what abilities and skills will you need to be successful ... · 3) self-control having the...
TRANSCRIPT
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What abilities and skills
will you need to be
successful in the 21st
century?
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What will it likely take to be successful in the
21st century?
1) Creativity
• Coming up with new ideas, hypotheses and
Inventions.
• If one way of solving a problem isn’t
working, how else might we succeed here?
Can we think outside the box to come up
with a way of attacking this no one else has
considered before?
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2) Flexibility
• Seeing opportunities and seizing them:
I was planning to do X, but an amazing
opportunity has arisen to do Y, do I have
the flexibility to take advantage of
serendipity?
• My opinion was X, but now that I see this
new information, I’m able to change my
opinion.
• Being able & willing to change course
when it seems you were wrong
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When one door closes, another
door opens;
but we often look so long and so
regretfully upon the closed door,
that we do not see the ones which
open for us.
- Alexander Graham Bell
An example of poor
cognitive flexibility:
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3) Self-control
Having the self-control to resist temptations and
not act impulsively -- be able to:
• think before you speak or act -- give a con-
sidered response instead of an impulsive one
• not over-indulge or indulge in the wrong things
• resist saying something socially inappropriate
(or hurtful)
• resist ‘tit for tat’ (hurting someone because
that person hurt you)
• resist jumping to an interpretation of what
something meant or why it was done
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4) Discipline / Perseverance
Having the discipline to stay on task…
seeing it through to completion despite
unexpected problems, some aspects
being boring or perhaps frustratingly
difficulty, & tempted by lots of things far
more fun
continuing to work at something though the
reward may be a long time in coming
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Evidence shows that discipline
accounts for over twice as
much variation in final grades
as does IQ, even in college.
(Duckworth & Seligman, 2005)
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Question:
How do creativity,
flexibility, self-control, &
discipline map onto the 3
core EFs?
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ALL of the above are
“Executive Functions”
or rely on them
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The 3 core Executive Functions are:
• Cognitive Flexibility
(including being able to switch perspectives
& see things in a new light)
• Inhibitory Control
(which includes self-control & discipline)
• Working Memory
Higher-order Executive Functions are:
• Problem-solving
• Reasoning
• Planning
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Inhibitory control includes being able to
(1) stay focused despite distraction
SELECTIVE or FOCUSED ATTENTION
(2) stay on task (& complete task)
though tempted not to - DISCIPLINE
(3) inhibit acting impulsively & instead
make a more considered response (not
putting your foot in your mouth, not
hitting, not drinking too much, dieting)
SELF-CONTROL
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Inhibition can be critical in helping
students to wait before speaking or
acting
so that they think before they act
instead of impulsively reacting, and
so that they resist the temptation to
answer quickly, instead taking the time
they need.
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THE DAY-NIGHT TASK
“Day”
“Night”
Semantically conflicting labels
(Gerstadt , Hong, & Diamond, 1994)
Requires holding 2 rules in mind, and inhibiting
saying what the images really represent, saying
the opposite instead.
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Experimenter sings a little ditty
think about the answer, don’t tell me
before the child responds.
Imposes time between presentation of stimulus
and response to make children take the time
they need to ‘compute’ the answer
DITTY
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8 9 %
5 6 %
0%
20%
40%
60%
80%
100%
Song Standard
Percentage of Correct Responses by 4-Year-
Old Children on the Song and Standard
Conditions of the Day-Night Task
Pe
rce
nt
Co
rre
ct
Chance
~ 90%
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VIDEO VIDEO
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Inhibition allows us a measure of control
over our attention and our actions, rather
than simply being controlled by external
stimuli, our emotions, or old habits of mind
or behavior.
Thus it helps make it possible for us to
change & to CHOOSE how we react and
how we behave rather than being “unthink-
ing” creatures of habit. It doesn’t make
overriding habits or automatic responses
easy, but it creates the possibility.
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Children with less inhibitory control (i.e.,
children who were less persistent, more
impulsive, and had poorer attention regulation)
as adults 30 years later have…
worse health
earn less
and commit more crimes
than those with better inhibitory control as
young children,
controlling for IQ, gender, social class, & home
lives & family circumstances growing up
across diverse measures of inhibitory control.
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That’s based on a study of 1,000 children born
in the same city in the same year followed for 32
years with a 96% retention rate.
by Terrie Moffitt et al. (2011)
Proceedings of the Nat’l Academy of Sci.
Interventions that achieve even small improve-
ments in [inhibitory control ] for individuals
could shift the entire distribution of outcomes in
a beneficial direction and yield large improve-
ments in health, wealth, and crime rate for a
nation.”
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Nowhere in their data, did Moffitt et
al. find any hint of a discontinuity or
cutoff between those clinically
diagnosed with a self-control
impairment (like ADHD) and
everyone else. For wealth, health,
and crime the gradients are linear
and continuous.
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Those ADULTS, who as children had worse inhibitory
control, have worse HEALTH Moffitt et al., 2011
Childhood Inhibitory Control in Quintiles
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What does that
imply about
disorders like
ADHD?
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(b) Working Memory:
Holding information in mind
and mentally working with it
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Working memory is critical for
making sense of anything that
unfolds over time, for that always
requires holding in mind what
happened earlier & relating that
to what is happening now.
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relating one idea to another
relating what you read (or learned /
heard) earlier to what you are reading
(learning / hearing) now
mental math calculations
understanding cause and effect
remembering multi-step instructions
& executing them in the correct order
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Reasoning would not be possible
without working memory, for
reasoning requires holding bits of
information in mind and seeing
how they relate. Working memory
enables us to consider the past
and possible future in making
plans and decisions.
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What some people call
“working memory” could also
be termed:
Keeping your ATTENTION
focused on specific mental
contents while mentally
working with them
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Empirically, selective attention and
working memory are very tightly
linked.
The same prefrontal system that
helps us selectively attend to
stimuli in our environment also
helps us selectively keep our mind
focused on the information we want
to hold in mind in working memory
(e.g., Ed Awh; Adam Gazzaley).
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The distinction between
attention and working memory
may be arbitrary.
They appear to be similar in
many ways, including neural
basis.
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• Need to remember your goal
(what’s relevant) in order to
know what to inhibit
• Need to inhibit distraction to
be able to concentrate on the
relevant info held in mind
Inhibition and Working Memory
are tightly linked (each needs
the other).
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being able to easily & quickly switch
perspectives or the focus of attention,
flexibly adjusting to changed demands
or priorities,
being able to think outside the box.
(c) COGNITIVE FLEXIBILITY
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For example, try to think of as
many uses for a TABLE as you
can.
What are all the things you might
use a table for?
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A table might be used to write on or to
eat food on.
It might be turned on its side and used
to keep a door closed or used as a
shield against bullets or snowballs.
You could get under it to hide or to keep
dry.
You could cut it up for firewood.
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(c) COGNITIVE FLEXIBILITY
Note that shifting mental sets involves both:
activating the new set (WM)
& de-activating the old one (inhibition)
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Cognitive Flexibility
appears years later than
working memory or
inhibition.
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When sorting by COLOR,
Correct Response is the Blue Star.
Card to be sorted:
Model Cards:
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When sorting by SHAPE,
Correct Response is the Red Truck.
Card to be sorted:
Model Cards:
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3-year-olds sort the cards
perfectly
by either
color or shape
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20%
70%
0%
20%
40%
60%
80%
100%
3 Year Olds 4 Year Olds
Pe
rce
nta
ge
of
Ch
ild
ren
wh
o
Su
cc
es
sfu
lly
Sw
itc
h D
ime
ns
ion
s
but, very few 3-yr-olds
can switch how they sort
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2 VIDEOS
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The child has clearly in mind
what the new sorting criterion
is and the appropriate rules for
that dimension.
BEFORE the stimulus appears
the child is all set to perform
correctly.
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Then a stimulus appears
that is relevant to both
tasks, in incompatible ways.
That CREATES a problem,
triggering the mindset the
child is trying to inhibit.
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The core problem for 3-year-olds in
switching appears to be:
Attentional Inertia
Once they have focused their attention on a
dimension, their attention gets STUCK
there. They need to disengage from, or
inhibit, their previous way of thinking about
the stimuli.
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Helping Children Apply their Knowledge
to their Behavior on a
Dimension-Switching Task
Natasha Kirkham, Loren Cruess
& Adele Diamond
Developmental Science 2003
vol 6, pages 449-467
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It is not enough to know
something or remember it;
you must get that knowledge
into your behavior.
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Each dimension is an
intrinsic part of the
stimulus object.
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What if both dimensions
are not properties of the
stimulus?
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0 10 20 30 40 50 60 70
2½ -year-olds 3 -year-olds 3½ -year-olds
Age Groups
Pe
rce
nta
ge
of
Ch
ild
ren
Su
cc
es
sfu
lly
Sw
itc
hin
g D
ime
ns
ion
s
Integrated
Dimensions
Separated
Dimensions
10.5%
15.8%
12.5%
37.5% 35.7%
64.3%
Roughly twice as many pass separated
as pass integrated (3x at 3 years)
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0 10 20 30 40 50 60 70
29.3 – 34.4 35.8 – 40.4 41.2 – 45.7
mean = 32.1 mean = 37.6 mean = 43.1
N = 19 N = 24 N = 14
Age in Months
Po
sts
wit
ch
P
erc
en
t C
orr
ec
t
10% 17% 18% 44% 41% 63%
*
* Roughly 6 months ahead
on Separated vs. Integrated Dimensions
Integrated
Dimensions Separated
Dimensions
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Children’s performance on the
dimensional change card sort task:
Separation aids ability to switch
dimensions
Adele Diamond,
Stephanie Carlson, & Danielle Beck
(2005)
Developmental Neuropsychology
vol 28, p.689-729
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Patricia Brooks, Julie B. Hanauer, Barbara
Padowska, & Heidy Rosman
(2003)
The role of selective attention in preschoolers’
rule use in a novel dimensional card sort.
Cognitive Development
vol 117, p 1-21
Josef Perner & Birgit Lang
(2002)
What causes 3-year olds' difficulty on the
dimensional change card sorting task?
Infant & Child Development
vol 11, p. 93-105
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Developmental Progression
Succeed at…. at Age
Reversals (intra-dimensional shift) 2½
- extra-dimensional switches (1 dimen. to another) -
DCCS - Separated Dimensions 3½
DCCS (Standard) - Integ. Dimen. 4½
DCCS - Mixed Block…………….... 7½
(switching dimensions randomly
across trials)
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Why are Executive Functions
important?
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Executive Function skills
are more important for
school readiness than are
IQ or entry-level reading or
math.
(e.g., Blair, 2002; 2003; Blair & Razza,
2007; Normandeau & Guay, 1998)
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Executive Functions are also
important for school success.
Working memory and inhibitory
control each independently
predict both math and reading
competence throughout the
school years.
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Executive Functions are also
critical for job success.
Poor EFs lead to poor
productivity and difficulty
finding and keeping a job (Prince
et al. 2007).
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Executive Functions are also
important for marital harmony.
People with poor EFs are more
difficult to get along with, less
dependable, and more likely to
act on impulse (Eakin et al. 2004).
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Executive Functions are also
important for making and keeping
friends, for being accepted by other
children.
Children with poor EFs often respond
impulsively, have trouble resisting
urges, & are forgetful; they don’t wait
their turn, forget the rules that all
agreed to, etc.
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Poor EFs cause social problems such
as disinhibited or criminal behavior.
The incidence of social problems
reflecting poor EFs (crime, incarcer-
ation, and being unemployable) is
increasing dramatically and the cost is
staggering (Atkinson et al. 2005).
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EFs are impaired in many mental
health disorders e.g., addictions, ADHD, OCD, depression,
conduct disorder, & schizophrenia (Verdejo-
García et al. 2006; Penadés et al. 2007; Diamond 2005;
Lui and Tannock 2007; Taylor-Tavares et al.2007; Barch
2005).
Such disorders are increasing at alarming
rates (Moffitt et al. 2010; Robinson et al. 1999) &
account for more lost years of life &
productivity than any other illness including
cancer (Prince et al. 2007).
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Poor EFs can also lead to poor physical
health including obesity, over-eating,
poor food choices, substance abuse, &
poor sustained adherence to doctors’
orders (Crescioni et al. 2011; McAuley
2011; Riggs et al. 2010).
In a large sample of >14,000, Miller et al.
(2011) found that youths with poorer self-
control were “exponentially more likely”
to suffer from 9 of the 10 adverse health
conditions they examined.
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In short, EFs are core skills
• critical for cognitive, social, and
psychological development,
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In short, EFs are core skills
• critical for cognitive, social, and
psychological development,
• success in school and in life,
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In short, EFs are core skills
• critical for cognitive, social, and
psychological development,
• success in school and in life, &
• for mental & physical health.
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Many issues are not simply
Education issues or Health
issues. They are both.
EFs are important for
academic achievement and
for mental & physical health.
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“Executive Functions”
depend on Prefrontal
Cortex and the other
neural regions with which
it is interconnected.
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Central Sulcus
Frontal Cortex
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Central Sulcus
Prefrontal
Cortex
Frontal Cortex
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Unusual properties of the
prefrontal dopamine system
contribute to PFC’s
vulnerability to environmental
and genetic variations that
have little effect elsewhere.
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The best mechanism from clearing
away released dopamine is by
dopamine transporter (DAT)
protein.
Dopamine transporter is abundant
in the striatum but sparse in
prefrontal cortex.
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Striatum
= DA Transporter
= DA Receptor
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Prefrontal Cortex
= DA Transporter
= DA Receptor
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Give an example of a gene
that might directly affect the
striatum.
Why?
What evidence supports
that?
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Polymorphisms of the
dopamine transporter
(DAT1) gene should be
important for the striatum.
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In ADHD that includes
hyperactivity there is a
primary problem in which
brain region?
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In ADHD (combined type &
primarily hyperactive) there
is a primary problem in the
striatum
(PFC-striatal circuit)
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Caudate
Nucleus
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Caudate
Nucleus
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Z=116 Head of the Caudate
Putamen
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Z=116 Head of the Caudate
Putamen
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Polymorphisms of the dopamine
transporter (DAT1) gene
should affect which brain region?
and therefore should be linked to
which types(s) of ADHD?
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Polymorphisms of the dopamine
transporter (DAT1) gene should
be important for the striatum
and for the forms of ADHD linked
to the striatum (ADHD that
includes hyperactivity -- combined
type & primarily inatentive)
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Levels of hyperactive-
impulsive symptoms are
correlated with the number
of DAT1 high-risk alleles
but levels of inattentive
symptoms are not
(Waldman et al., 1998)
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DAT binding specifically in
the striatum has been found
to be related to motor
hyperactivity but not to
inattentive symptoms
(Jucaite et al., 2005)
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In ADHD there is a primary
problem in the striatum
(PFC-striatal circuit)
I hypothesize that
in ADD there is a primary
problem in PFC (in
the PFC-parietal network)
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The dopamine receptor
subtype, DRD4, is present in
prefrontal cortex in humans,
but not in the striatum.
(Meador-Woodruff et al., 1996)
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the 7-repeat polymorphism of the
DRD4 gene should be
more strongly linked to which
brain region?
and therefore be linked to
which types(s) of ADHD?
ADD (inattentive ADHD)
and to prefrontal cortex
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Polymorphisms of the DRD4 gene
should affect prefrontal cortex
and therefore should be linked to
ADD (inattentive type of ADHD)
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DAT1 gene expression
preferentially affects
caudate volume,
while DRD4 gene expression
preferentially affects
prefrontal gray matter volume
(Durston et al., 2005)
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A link between the DRD4 gene and
ADD is consistent with the finding of
Auerbach et al. (2001)
Significant relation between
individual differences in sustained
attention & working memory and
polymorphism of the DRD4 gene
in normal infants (those with the 7-
repeat-allele performing worse)
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ADD is a different disorder from ADHD.
They have….
• different cognitive & behavioral
profiles,
• different patterns of comorbidities,
• different responses to medication,
and
• different underlying neurobiologies.
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ADHD children tend to be
frenetic and hyperactive.
A significant proportion of
ADD children are exactly the
opposite - hypoactive,
sluggish, & very slow to
respond.
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ADHD children tend to
be insufficiently self-
conscious.
ADD children tend to be
overly self- conscious.
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Both groups tend to have social problems,
….but for different reasons.
An ADHD child alienates other children by
butting in, taking their things, failing to
wait his or her turn, & acting without
having first considered others’ feelings.
An ADD child is likely to have social
problems because of being too passive or
shy.
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ADD children are not so
much as easily distracted
as easily bored.
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Their problem is more in motivation
(under-arousal) than in inhibitory
control.
It is not so much that distraction
derails them… as that they go
looking for distraction because
their interest in what they had
started has dwindled.
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Challenge or risk, something to literally get their
adrenaline pumping, can be key to keeping
their attention and to eliciting optimum
performance.
(Note, the beneficial effects of Amphetamines,
which release more DA & NE.)
ADD adults sometimes say they can focus better
when driving if they speed than if they drive
slowly.
ADD children often perform better on the
continuous performance tasks when
challenged by a fast presentation rate.
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The dopamine transporter
moves dopamine from the synapse back into the sending neuron.
Methylphenidate blocks the
dopamine transporter (1.e.,
blocks re-uptake), causing an increase in dopamine concentration at the synapse.
Synapse
Dopamine
Dopamine receptor
Methylphenidate’s Mechanism of Action
at Moderate to High Doses
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The dopamine transporter
moves dopamine from the synapse back into the sending neuron.
Methylphenidate blocks the
dopamine transporter (1.e.,
blocks re-uptake), causing an increase in dopamine concentration at the synapse.
Synapse
Dopamine
Dopamine receptor
Methylphenidate’s Mechanism of Action
at Moderate to High Doses
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Most children with ADHD that
includes hyperactivity respond
positively to methylphenidate (Ritalin)
in moderate to high doses.
Barkley et al., 1991; Barkley, 2001;
Milich et al., 2001; Weiss et al., 2003
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On the other hand, a significant
percentage of children with
ADD are not helped by methyl-
phenidate and those who are
helped often do best at low
doses.
(Barkley et al., 1991; Barkley, 2001;
Milich et al., 2001; Weiss et al., 2003)
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Recent research suggests that
low doses of MHP (dosages
likely to be effective in treating
ADD) preferentially increase
dopamine release where in the
brain?
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Recent research suggests that
low doses of MHP (dosages
likely to be effective in treating
ADD) preferentially increase
dopamine release in the
prefrontal cortex.
(Berridge et al., 2006)
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A role for polymorphisms of the
DAT1 gene in ADHD is consistent
with the efficacy of high to
moderate dose methylphenidate in
treating ADHD, as methylphenidate
acts directly on DAT function.
(Dresel et al., 2000; Seeman &
Madras, 1998; Shenker, 1992;
Volkow et al., 1998)
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ADD (ADHD without hyperactivity), a
neurobiologically and behaviorally distinct
disorder from ADHD (with hyperactivity)
Adele Diamond (2005)
Development and Psychopathology,
vol. 17, p. 807-825
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Prefrontal Cortex
= DA Transporter
= DA Receptor
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This makes prefrontal cortex more
dependent on secondary
mechanisms (such as the COMT
[catechol-O-methyltransferase]
enzyme) for clearing dopamine
from extracellular space than are
other brain regions, such as the
striatum.
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COMT Gene
catechol-O-methyltransferase
gene
codes for the COMT enzyme,
which methylates released
dopamine.
It’s located on chromosome 22.
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A single base pair substitution
CGTG to CATG
translates into a substitution of
Methionine for Valine at codon 158
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Why is COMT more important
in prefrontal cortex than in
other regions of the brain
such as the striatum?
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Prefrontal cortex is more likely to be
affected by differences in the COMT
gene or how fast the COMT enzyme
clears dopamine than other brain
regions because other brain regions
have a lot of the best mechanism for
clearing released dopamine (DAT
protein) but poor PFC does not, so
PFC needs to rely on alternative
ways to clear DA, like COMT.
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What effect does having
methionine at codon-158 of
the COMT gene have on
level of dopamine in
prefrontal cortex? Why?
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Catechol-O-methyltransferase (COMT) Val158 Met
High dopamine
Zalsman et al.
Low activity enzyme
High activity enzyme
Low dopamine
SYNAPSE
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Which variant of the COMT
gene is associated with
better PFC function and
better executive functions?
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The Methione variant of the
COMT gene is associated
with better PFC function
and better executive
functions.
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The Optimum Level of
Dopamine in PFC is an
Intermediate Level
too little too much
Arnsten & Li, 2005
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Differences in COMT Genotypic
lead to Differences in PFC DA Levels
too little too much Met-158
Val-158
Optimal level of DA in PFC
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too little too much Met-158
Val-158
Optimal level of DA in PFC
Differences in COMT Genotypic
lead to Differences in PFC DA Levels
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This effect is specific to PFC
function:
There is no relation between the
Met vs. Val allele of the COMT
gene with IQ or other non-PFC
functions.
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Dots - Congruent
Push Left
Push Right Push Left
Push Right
Dots - Incongruent
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Diamond et al. (2004)
American
Journal of
Psychiatry
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What’s the downside
of Met variant of
COMT?
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Even mild stress increases DA release in
PFC but not elsewhere in the brain
Stress and Prefrontal Cortex
(Roth et al., 1988)
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Genotypic Difference in PFC DA Levels
leads to Genotypic Differences in Stress
Reactivity
too little too much Met-158
Val-158
Effect
of Mild
Stress
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Persons homozygous for the MET
variant of the COMT gene (which
results in more DA in PFC), while they
tend to have better executive function,
also tend to be more sensitive to
stress, have higher anxiety, & higher
pain stress responses.
Zubieta et al., Science (2003)
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Buckert et al. (2012): When stressed, young adults homozygous for COMT-
Met158 showed worse EFs (performed worse on the 2-back test) than young
adults homozygous for COMT-Val158 (the reverse of what is usually found).
The presence of stress was confirmed by heartrate and salivary cortisol.
When the task was too easy (1-back) or too difficult (3-back) there were no
group differences.
Val / Val COMT
Met / Met COMT
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Genotypic Difference in PFC DA Levels
leads to Genotypic Differences in Stress
Reactivity
too little too much Met-158
Val-158
Effect
of Mild
Stress
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It has long been known that some of
the brightest people also have the
most fragile personalities and are
highly reactive to stress.
Here is a possible mechanism for
why the two might go together.
re: dandelion & orchid children
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‘Dandelions’ are children who do okay
wherever they are planted. They are
often seen as models of resilience.
Perhaps children homozygous for
COMT Val-158 are the dandelions;
they will do okay even in a stressful
environment, but might lack the
exquisite fine-tuning of prefrontal
cortex needed to achieve the
brilliance of which a COMT Met-158
child might be capable.
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Research shows that some of the
children who look the worst when they
are in an unsupportive, stressful
environment are exactly those who
blossom the most when in a good
environment.
Perhaps some children homozygous
for COMT Met-158 are among the
orchids -- they might look like a
disaster when in a stressful
environment, yet might blossom
brilliantly in the right environment.
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The COMT Met-158 genotype, which
confers risk on individuals when they
are in adverse, stressful
circumstances, holds out promise of
extraordinary potential if only the
right fit of circumstances can be
found for the individual.
A child who is not doing well in
one environment, or with a particular
instructional style, might shine in
another environment or with a
different teaching approach.
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GENDER DIFFERENCES
Why might the story (about
which variant of the COMT gene
is generally better for cognitive
function) be different for women
than for men?
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NO Stress STRESSED
Males Females 0
20
40
60
80
100
% o
f C
on
dit
ion
ed
R
es
po
ns
es
Effect of Stress on Trace Eyeblink Conditioning
in Male and Female Rats
Shors & Leuner, 2003
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Even mild stress increases DA release in
PFC but not elsewhere in the brain
Stress and Prefrontal Cortex
(Roth et al., 1988)
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The Optimum Level of
Dopamine in PFC is an
Intermediate Level
too little too much
Arnsten & Li, 2005
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Hypothesis:
Gender Difference in Baseline
Level of Dopamine in PFC
too little
DA
too much
DA Females
Males
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Hypothesis:
Gender Difference in Baseline
Level of Dopamine in PFC
too little
DA
too much
DA Females
Males
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Hypothesis:
Gender Difference in Baseline
Level of Dopamine in PFC
too little
DA
too much
DA Females
Males
Female animals perform superbly at baseline (i.e., unstressed).
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Gender Difference in Effect of
Mild Stress on Level of
Dopamine in Prefrontal Cortex
too little too much Females Males
Effect
of Mild
Stress
Male animals perform better when slightly stressed.
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WHY?
Why might Females have
higher baseline levels of
DA in PFC than Males?
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Estrogen down-regulates
human COMT transcription
(Ho, 2006).
COMT activity is 30% lower in
women than men.
Varies with estrus cycle in rats;
inverse relation between COMT
activity and estrogen levels.
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Stress & PFC
(Shansky et al., 2004) Delayed Alternation
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Stress & PFC (Females only)
(Shansky et al., 2004) Delayed Alternation
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Congruent
Push Left
Push Right Push Left
Push Right
Incongruent
HEARTS & FLOWERS
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Jeanette Evans
John Fossella, Elizabeth Hampson,
Clemens Kirschbaum, C., & Adele Diamond
Jan. 15, 2009
Gender Differences in the Cognitive
Functions Sensitive to the Level of
Dopamine in Prefrontal Cortex.
Presented at inaugural conference of a
series on "Executive Function &
Dysfunction," University of Boulder, CO
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What are possible
implications of this
gender difference?
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If women have higher baseline
levels of DA in PFC that would have
implications for gender and
menstrual-phase differences in the
optimal dosage levels of
medications that affect PFC DA
levels.
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But whether women have
higher baseline levels of DA
in PFC than males is
ONLY A HYPOTHESIS.
There are no data on this yet.
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Congruent
Push Left
Push Right Push Left
Push Right
Incongruent
HEARTS & FLOWERS
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HEARTS – CONGRUENT Each time you see a HEART, press with the thumb or forefinger on the SAME side as the stimulus. For example, if the heart appears on the left, press with your left hand. Remember:
PRESS ON THE SAME SIDE AS THE HEART
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FLOWERS - INCONGRUENT Now you’ll see a flower. Press on the side OPPOSITE the flower. For example, if a flower appears on the left, press with your right hand.
(Here, you’ll need to inhibit on every trial the natural tendency to respond on the same side as the stimulus) Remember:
PRESS ON THE SIDE OPPOSITE THE FLOWER
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HEARTS & FLOWERS-MIXED: Now you will sometimes see a heart and sometimes a flower. On only half the trials will you have to inhibit the tendency to press on the same side as the stimulus, BUT you’ll have to switch between the same-side and opposite-side rules.
The rules stay the same:
For HEARTS, press on the SAME side.
For FLOWERS, press on the OPPOSITE side.
HEARTS – SAME SIDE
FLOWERS – OPPOSITE SIDE
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It is not that children forget the rules.
Indeed, children often call out the
correct higher-order rule on trials in the
mixed condition (e.g., “same,”
“opposite,” “opposite,” “same”) even as
they are making errors.
The problem seems to be in quickly
translating the rule into the correct
response.
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60
70
80
90
100
4 5 6 6 7 8 9 10 11 13 26
Pe
rce
nt
Co
rre
ct
Hearts and Flowers Task: Accuracy
Stimuli presented for 2500 ms Stimuli presented for 750 ms
Age in Years
Davidson et al. (2006). Neuropsychologia, 44, 2037 - 2078
Congruent Incongruent
Mixed
Adults
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60
70
80
90
100
4 5 6 6 7 8 9 10 11 13 26
Pe
rce
nt
Co
rre
ct
Dots Conditions: Accuracy
Stimuli presented for 2500 ms Stimuli presented for 750 ms
Age in Years
Davidson et al. (2006). Neuropsychologia, 44, 2037 - 2078
Congruent Incongruent
Mixed
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60
70
80
90
100
4 5 6 6 7 8 9 10 11 13 26
Pe
rce
nt
Co
rre
ct
Stimuli presented for 2500 ms Stimuli presented for 750 ms
Age in Years
Congruent Incongruent
Mixed
At every age
studied,
children were
slower & less
accurate on
the Flower
block than on
the Heart
block.
That effect is completely absent in adults.
Hearts and Flowers Task: Accuracy
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Even very young children have
excellent memories. Inhibition
is a far greater challenge for
them than holding information
in mind.
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Abstract Figures - Center Presentation
Push Left
Push Right
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Increasing demands on
INHIBITION (the Flower block
vs. the Heart block) are more
difficult for young children
(ages 4-9 years) than increasing
demands on how much
information they must hold in
mind (2 to 6 items).
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The opposite is true for us
adults:
Increasing MEMORY demands
is far more difficult for us than
increasing demands on
inhibition.
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The costs associated with
increasing MEMORY demands
are greater for adults,
the costs associated with
increasing INHIBITORY demands
are greater for young children.
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We adults may not appreciate
how inordinately difficult
inhibition is for young children
because it is so much less
taxing for us.
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BREAK
hooray!
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Nowhere is the importance of social,
emotional, and physical health for
cognitive health more evident than with
PFC & EFs.
EFs are the first to suffer, and suffer
disproportionately, if we are lonely, sad,
sleep-deprived, or not physically fit.
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To show the EFs they are capable of, to
achieve the academic outcomes of which
they are capable, students…
• need to feel joyful
• need to feel they are in a supportive
community they can count on, and
• their bodies need to be fit and healthy.
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Amy Arnsten, 1998 The biology of being frazzled
Science
This is particularly true for PFC & EFs.
Our brains work better
when we are not in a
stressed emotional state.
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Even mild stress increases DA release
in PFC but not elsewhere in the brain
Stress and Prefrontal Cortex
(Roth et al., 1988)
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Stress impairs EFs and can cause
anyone to look as if he or she has
an EF impairment when that’s not
the case.
(You may have noticed that when
stressed you cannot think as
clearly or exercise as good self-
control.)
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In college students, one month of stress in
preparation for a major exam disrupts
prefrontal cortex functional connectivity.
Stress decreases coupling between left DL-PFC and right DL-
PFC, and between DL-PFC and premotor cortex, the ACC, the
insula, posterior parietal cortex (PPC), and the cerebellum.
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Stress impairs their attention shifting (shifting
between attending to color or motion).
Liston et al. (2009) PNAS
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Desseilles et al., 2009 von Hecker & Meiser, 2005
When we are sad we’re worse at
filtering out irrelevant information
(i.e., worse at selective attention).
When we are happy we are better at
selective attention.
Gable & Harmon-Jones, 2008
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THE most heavily researched predictor of
creativity in social psychology is mood.
The most robust finding is that a happy mood
leads to greater creativity (Ashby et al. 1999).
It enables people to work more flexibly (Murray
et al. 1990) & to see potential relatedness
among unusual & atypical members of
categories (Isen et al. 1985, 1987).
People show more creativity
when they are happy
Hirt et al. 2008: 214
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Parents & teachers need to nurture
themselves & find ways to help
relieve their stress
and
students need ways to help relieve
their stress & help them relax.
We need to reduce stresses in
children’s lives. Children need to do
things that give them JOY.
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You’re not perfect.
You are going to make
mistakes.
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And, that’s OK.
You don’t need to be perfect.
Besides, no one ever is.
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I can guarantee 100% that
worrying about whether you are
a great student will NOT
improve your performance – it
will only make it worse.
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It’s okay to make mistakes;
everyone makes mistakes.
The only alternative is to
stay with what you already
know, to stop growing.
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Anyone who has never
made a mistake has never
tried anything new.
- Albert Einstein
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When we find out we were right, we’re
not learning anything new.
It is only when we are surprised -- when
we were wrong -- that we learn
something we didn’t know before.
Venture into the unknown, take the risk
of making a mistake or being wrong!
Be thrilled when your hypothesis is
disconfirmed!
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You've never failed until you've tried for the
last time, and you've never lost until you quit.
-- Samuel Proctor Massie
Few people have attained the respect, admiration, and degree of excellence achieved by Samuel Massie, born in the segregated South. Born in Little Rock, Arkansas in 1919, Samuel Massie was the grandson of slaves. In 1966 he became the first African-American professor at the US Naval Academy. He was named 1 of the 6 best college chemistry professors in the US & one of the 75 premier chemists of the 20th century, along with Marie Curie, James Watson, and Francis Crick. In 1995 Dr. Massie’s portrait was hung in the National Academy of Science gallery and in 2002 the US Dept. of Energy chose to name its Chairs of Excellence in the environmental sciences in his honour.
It’s never over
‘til it’s over
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PFC Stress
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P F C
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Putting Feelings Into Words
Produces Therapeutic Effects
on the Brain
When you put feelings into words, you
increase activation in prefrontal cortex and
that produces a reduced response in the
amygdala.
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Matt Lieberman et al., 2007
Amygdala activation went up in ALL conditions when an
angry or fearful face was shown, but ONLY in the one
condition (a) where subjects had to assign a verbal label
to the emotion, did amygdala activation GO DOWN.
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Inverse Relation between Activation in PFC and
the Amygdala in the Lieberman et al. study
(When activation in PFC goes up, activation in the
amygdala goes down.)
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If you can get people to talk or
write about their problems, their
psychological and physical health
improves.
--- James Pennebaker,
Opening Up: The Healing Power
of Expressing Emotions
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Translating an emotional
experience into language,
talking or writing about, alters
the way it is represented and
understood in our mind and our
brain (gets prefrontal cortex
more involved).
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We are not just intellects,
we have emotions
we have social needs
& we have bodies.
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Our brains work better when we are
not feeling lonely or socially
isolated.
Loneliness: Human Nature and
the Need for Social Connection 2008
a book by John Cacioppo & William Patrick
This is particularly true for PFC & EFs.
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Roy Baumeister et al. (2002, Journal of Personality and Social Psychology)
- One group of subjects were told beforehand they’d
have close relationships throughout their lives;
- another group was told the opposite;
- a third group was told unrelated bad news.
On simple memorization questions, the groups were
comparable.
On sections involving logical reasoning (EF),
subjects told they’d be lonely performed much worse.
Campbell et al. (2006) found that during math tests
there was Prefrontal Cortex worked less efficiently
among participants who felt isolated.
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One of the best ways to
support friends is to take
the time to give them your
undivided attention.
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The most basic and powerful way to
communicate that we care is to listen
to them. Truly listen.
Give your time and your attention.
The quality of our listening, rather
than the wisdom of our words, is often
what has the most impact.
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“Perhaps the most important thing
we ever give each other is our
attention. And especially if it's given
from the heart…”
“Listening is the oldest and perhaps
the most powerful tool of healing.”
-- Dr. Rachel Naomi Remen
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“The greatest gift
I can conceive of
having
from anyone
is
to be seen by them,
heard by them,
to be understood.”
-- Virginia Satir
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It's important is to be heard /
understood –
and to be liked anyway
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When we interrupt to try to show
we understand, we move the focus of
attention to ourselves.
Because we care, we are tempted
to want to do ‘more’ than ‘just’ listen.
But often what a friend needs most is
not for you to go into problem-solving
mode, but just for you to listen - truly
listen and care.
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Fire
What makes a fire burn
is space between the logs,
a breathing space.
Too much of a good thing,
too many logs
packed in too tight
can douse the flames
almost as surely
as a pail of water would.
So building fires
requires attention
to the spaces in between,
as much as to the wood.
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When we are able to build
open spaces
in the same way
we have learned
to pile on the logs,
then we can come to see how
it is fuel, and absence of the fuel
together, that make fire possible.
We only need to lay a log
lightly from time to time.
A fire
grows
simply because the space is there,
with openings
in which the flame
that knows just how it wants to burn
can find its way. - Judy Brown
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In Gottman’s studies, if a wife felt she was
being heard the marriage was essentially
divorce-proof.
Gottman JM & Levenson RW. (1999). Rebound
from marital conflict and divorce prediction.
Family Process. 38(3):287-92.
“Differences must be grasped, even if no
problems are solved. One of the reasons
empathy works so well is because it does
not require a solution. It requires only
understanding.”
John Medina, Brain Rules for Baby
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We are not just intellects,
we have emotions
we have social needs
& we have bodies
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You need your sleep.
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Lack of sleep will produce
deficits in EF skills, and cause
someone to look as if he or she
has an EF
impairment,
like ADHD.
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Our brains work better when our
bodies are physically fit.
Nature Reviews Neuroscience (January 2008)
“Be Smart, Exercise Your Heart: Exercise Effects on Brain and Cognition”
Charles Hillman, Kirk Erickson & Art Kramer
“There is little doubt that leading a sedentary life
is bad for our cognitive health.”
This is particularly true for PFC & EFs.
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Nature Reviews Neuroscience (January 2008)
“Be Smart, Exercise Your Heart:
Exercise Effects on Brain and Cognition”
Charles Hillman, Kirk Erickson & Art Kramer
Evidence shows that physical activity (especially aerobic
exercise) robustly improves cognition and brain function.
In particular, the frontal lobe and the executive functions
that depend on it show the largest benefit from improved
fitness.
The positive effects of aerobic physical activity on
cognition and brain function are evident at the molecular,
cellular, systems, and behavioral level.
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and there have been many more review papers
since 2008 including:
Streiner, D. L. (2009). The effects of exercise programs
on cognition in older adults: A review. Clinical Journal of
Sport Medicine, 19(5), 438.
Tseng, C. N., Gau, B. S., & Lou, M. F. (2011). The
effectiveness of exercise on improving cognitive function
in older people: A systematic review. The Journal of
Nursing Research, 19(2), 119-130.
Voss, M. W., Nagamatsu, L. S., Liu-Ambrose, T. , &
Kramer, A. F. (2011). Exercise, brain, and cognition across
the lifespan. Journal of Applied Physiology, 111(5), 1505-
1513.
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The brain doesn’t recognize the
same sharp division between
cognitive and motor function that
we impose in our thinking.
The SAME or substantially
overlapping brain systems subserve
BOTH cognitive and motor function.
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For example, the pre-Supplementary
Motor Area (SMA) is important for
sequential tasks,
whether they are sequential motor
tasks or
sequential numerical, verbal, or
spatial cognitive tasks.
Hanakawa et al., 2002
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Most cognitive tasks that activate
dorsolateral prefrontal cortex also activate
the cerebellum.
When dorsolateral prefrontal cortex activity
increases so does activity in the contralateral
cerebellum.
When dorsolateral prefrontal cortex activity
decreases (e.g., when a task has been
practiced and requires less concentration) so
does cerebellar activation.
Activation in these two regions is strikingly
correlated and closely coupled.
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Motor development and
cognitive development appear
to be fundamentally intertwined.
Diamond, A. (2000)
Close interrelation of motor development and cognitive development
and of the cerebellum and prefrontal cortex.
Child Development, 71, 44-56
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When cognitive development
is perturbed,
as in a neurodevelopmental
disorder,
motor development is often
adversely affected as well.
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For example……
At least half of all children with ADHD have
poor motor coordination & fit the diagnosis
for developmental coordination disorder.
At least half of all children with develop-
mental coordination disorder have ADHD.
Similarly for dyslexia, autism, and other
disorders.
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Diamond, A. & Lee, K.
(2011)
Interventions shown to Aid
Executive Function Development
in Children 4-12 Years Old
Science, vol. 333
accompanying online tables
Science asked me to write a review of all interven-
tions shown to improve EFs in young children
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Diverse activities including
computer training, aerobics,
martial arts, yoga, mindfulness,
& school curricula have all been
shown to improve children’s
executive functions..
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Many studies have found that aerobic
exercise seems to improve prefrontal
cortex function and EFs but all but 3
of those studies have either involved
adults and/or examined effects of a
single bout of aerobic exercise,
where benefits may be transient.
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Exercise alone appears not to
be as effective in improving EFs
in children as exercise-plus-
character-development (tradi-
tional martial arts) or exercise-
plus-mindfulness (yoga).
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Lakes & Hoyt (2004) randomly
assigned children in grades K
thru 5 (roughly 5-11 years-old)
by homeroom class to Tae-
Kwon-Do martial arts (N = 105)
or standard physical education
(N = 102).
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Children who had been assigned to Tae-
Kwon-Do training showed greater gains
than children in standard phys. ed. on all
dimensions of EFs studied (e.g., cognitive
[distractible —focused] and affective
[quitting —persevering] - subtests of the
Response to Challenge Scale). This
generalized to multiple contexts and was
found on multiple measures. They also
improved more on mental math (which
requires working memory).
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Traditional martial arts
emphasize self-control,
discipline (inhibitory control),
and character development.
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In a study with adolescent juvenile
delinquents (Trulson, 1986), one
group was assigned to traditional
Tae-Kwon-Do (emphasizing qualities
such as respect, humility,
responsibility, perseverance, honor
as well as physical conditioning).
Another group was assigned to
modern martial arts (martial arts as a
competitive sport).
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Those in traditional Tae-Kwon-Do
showed less aggression and anxiety
and improved in social ability and
self-esteem.
Those in modern martial arts
showed more juvenile delinquency
and aggressiveness, and decreased
self-esteem and social ability.
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Whether EF gains are
seen depends on the
way an activity is done.
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Regardless of the
program to improve EFs,
a few principles hold:
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1. Those with initially poorest EFs
gain the most.
e.g., lower-income, lower WM
span, or ADHD children
generally show the most EF
improvement from any program
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Children at-risk start school with
worse EFs than more advantaged
children and fall progressively
farther behind each school year
(O'Shaughnessy et al. 2003).
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Thus early EF training is an
excellent candidate for reducing
social inequality (because it
should improve the EFs of the
most needy children most) -- thus
heading off gaps in achievement
and health between
more- and less-
advantaged children.
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2. EF training appears to transfer,
but the transfer is not wide.
Computerized working memory
training improves working
memory but not inhibition or
speed & probably not
reasoning in children.
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EF gains from training in traditional
martial arts (Lakes & Hoyt, 2004) and
school curricula (Raver et al., 2011;
Riggs, Greenberg, Kusché, & Pentz,
2006) are wider, perhaps because the
programs themselves address EFs
more globally, so the transfer may not
be wider but the programs address
more EF components.
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3. The largest differences between
intervention groups and controls
are consistently found on the most
demanding EF tasks and task
conditions.
Often differences are not found except
on the hardest EF condition. It is in
pushing the limits of children’s EF skills,
that group differences emerge.
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4. EFs need to be
continually challenged
to see improvements -
not just used, but
challenged.
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Groups assigned to the same
program, but without difficulty
increasing, do not show EF gains.
Setting aside a time to work on EFs
is less effective than working on
EFs as part & parcel of everything
you do.
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The Importance of
Repeated Practice
Whether EF gains are seen
depends on the amount of time
spent practicing, working on
these skills, pushing oneself to
improve.
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Consistent with: what Ericsson reports is
key for being truly excellent at anything --
10,000 hours of deliberate practice
trying to master what is just beyond
your current level of competence and
comfort
(working in what Vygotsky would call the
‘zone of proximal development’)
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To learn something new, we need
prefrontal cortex.
But after something is no longer
new, persons who perform best
recruit prefrontal cortex least.
Prefrontal cortex
(what I specialize in)
is over-rated.
Prefrontal
Cortex
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TT
NS MT
DO
DC KO
RB
The DLPFC Slice for
8 Individuals
CB
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When something is new, those who
recruit PFC most, usually perform
best.
(Duncan & Owen 2000, Poldrack et al. 2005)
But when you are really good at it,
you are NOT using PFC.
(Chein & Schneider 2005, Garavan et al. 2000,
Landau et al. 2007, Milham et al. 2003, Miller et
al. 2003)
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Older brain regions have had far longer to
perfect their functioning; they can subserve
task performance ever so much more
efficiently than can prefrontal cortex (PFC).
A child may know intellectually (at the level of
PFC) that he shouldn’t hit another, but in the
heat of the moment if that knowledge has not
become automatic (passed on from PFC to
subcortical regions) the child hit another
(though if asked, he knows he shouldn’t do
that).
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knowing what one should do
vs.
2nd nature (automatic)
(i.e., NOT dependent on PFC)
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The only way something
becomes automatic
(becomes passed off from
PFC) is through action,
repeated action.
Nothing else will do.
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“We are what we repeatedly do.
Excellence, then, is not an act, but a habit.
We don’t act rightly because we have virtue
or excellence, but we rather have these
because we have acted rightly; these
virtues are formed in a person by doing the
actions;
we are what we repeatedly do.”
Aristotle, Ethica Nicomachea, 4th century BC
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The Importance of
…Action for Learning
…Learn through Doing
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Hands-on Learning
We evolved to be able to learn to help us
act, to help us do what we needed to do.
If information is not relevant for action,
we don’t pay attention in the same way
(hence the difference in route memory
for the driver, versus the passenger, of a
car).
You learn something when you NEED it
for something you want to DO.
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(My son teaching me to program
the VCR)
The same is true when we teach
children in school. They need
opportunities to concretely
apply what they are taught.
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We all know this, so why is
so much of schooling still
didactic instruction by the
teacher, rather than active
and hands on?
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Almost any activity can be the
way in, can be the means for
disciplining the mind and
enhancing resilience.
MANY activities not yet
studied might well improve EFs.
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It depends on the way an activity is
done and the amount of time spent
doing it, pushing oneself to do better.
The most important element is
probably that the child really want to do
it, so s/he will spend a lot of time at it.
It’s the discipline, the practice, that
produces the benefits.
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Might as well do
something you can put
their heart and soul into.
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Circus Arts
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could be caring for an animal….
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SERVICE ACTIVITIES
activities where the children are working to help
their community or people elsewhere
a goal larger than oneself --
helping children in Haiti, helping a
local family whose home burned
down, lobbying to get a new
playground for the neighborhood
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These are acts of caring and generosity,
They require forethought , planning, and
perseverance even in the face of setbacks,
creativity and flexibility when unexpected
obstacles or opportunities arise, and
putting into use what they’ve learned in school.
Each is a member of a group working toward
an important shared goal.
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Dancing Makes You Smarter
Verghese et al. (2003) examined the
relation between leisure-time
cognitive activity or physical activity
on the incidence of dementia. At the
study’s outset all participants were
at least 75 years and dementia-free.
Five years later…..
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Reading or doing crossword puzzles
was associated with 35% reduced risk
of dementia.
Almost none of the physical activities
offered protection against dementia –
except dance.
Dance conferred the greatest risk
reduction of any activity studied,
cognitive or physical – a whopping 76%
reduced risk of dementia.
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For 10's of 1,000's of years, across all
cultures, storytelling, dance, art, & play
have been part of the human condition.
People in all cultures made music,
sang, danced, did sports, and played
games. There are good reasons why
those activities have lasted so long and
been found so ubiquitously.
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Storytelling requires and invites
a child’s rapt attention for
extended periods (sustained,
focused attention), and,
working memory to
hold in mind all that has
happened thus far,
different characters’
identities, and to relate
that to the new info
being revealed.
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I predict that while Story-reading is wonderful
Storytelling should tax EFs
more & so im-
prove them more
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Music-making, singing,
dancing, & playing sports
address our physical, cogni-
tive, emotional, & social needs.
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These activities
…challenge our executive functions,
…make us happy & proud,
…address our social needs, and
…help our bodies develop
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Because they challenge EFs directly,
and indirectly support EFs by
increasing joy,
a sense of belonging, &
physical exercise,
I predict they should improve EFs.
(and we’re hoping to get funding to test my prediction for
El Sistema Orchestra & for social, communal dance)
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to recap this last portion:
‘Executive Functions’ are
needed for the top-down control
of behavior in the service of a
goal.
EFs are needed whenever going
‘on automatic’ would be
insufficient or detrimental.
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Executive Functions (reasoning,
creative problem-solving, self-
control, discipline, attentional
control) are critically important
for school success throughout
all the school years.
Improving EFs improves
Academic Outcomes
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“Brain-based” does NOT mean
immutable or unchangeable.
Experience and activity change the
brain.
EFs depend on the brain --
but they can be improved
by the proper activities
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“We are what we repeatedly do.”
Aristotle
• The importance of repeated practice.
The only way something becomes automatic
(becomes passed off from PFC) is through
practice, repeated practice.
Nothing else will do.
Scaffolds can help someone practice a skill
that he or she could not perform unaided.
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We are not just intellects,
we also have emotions
social needs
& bodies.
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The different parts of the
human being are fundamentally
interrelated.
Each part (cognitive, spiritual,
social, emotional, & physical)
probably develops best when
no part is neglected.
Diamond, 2000
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Our brains work better, and we have
better EFs, when
• we’re not stressed or sad
• we’re not feeling lonely or isolated
• we’re physically fit
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Translating an emotional
experience into language,
talking or writing about, alters
the way it is represented and
understood in our mind and our
brain (gets prefrontal cortex
more involved).
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• What nourishes the human spirit may
also be best for Executive Functions.
Perhaps we can learn something from
the traditional practices of people
across many cultures & 1,000’s of
years.
• The arts, play, and physical activity may
be critical for achieving the outcomes
we all want for our children.
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The most effective way to improve
EFs and academic achievement is
probably not to focus narrowly on
those alone, but to also address
children’s emotional and social
development (as do all curricular-
based programs that improve EFs)
and children’s physical development
(as do aerobics, martial arts, & yoga).
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While it may seem logical that if
you want to improve academic
outcomes you should
concentrate on academic
outcomes alone, not everything
that seems logical is correct.
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Thanks for your
attention
The End