biological and experimental...
TRANSCRIPT
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Biological and Experimental PsychologySchool of Biological and Chemical Sciences
Michael Pluess, PhDCYFS Signature Event Series, University of Nebraska-Lincoln April 11 2018
Individual Differences in Environmental Sensitivity
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Lincoln, 11.04.2018
Slide 2
Individual Differences in Environmental Sensitivity
Overview
Environmental Sensitivity
Individual Differences
• Diathesis-Stress
• Differential Susceptibility
• Vantage Sensitivity
Mechanisms of Environmental Sensitivity
• Neurosensitivity Hypothesis
Phenotype of Environmental Sensitivity
• Sensory Processing Sensitivity
Sensitivity Types
Implications
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Lincoln, 11.04.2018
Slide 3
Individual Differences in Environmental Sensitivity
Environmental Sensitivity
Environmental Sensitivity is a fundamental trait found in most species, including humans:
• Ability to register and process external stimuli
Do all people have the same degree of Environmental Sensitivity?
• Differences in Environmental Sensitivity are widely observable and are reflected in many psychological concepts
E.g.: Personality traits, stress reactivity etc.
→ Some people are generally more and some people generally less sensitive
Pluess, M. (2015). Individual Differences in Environmental Sensitivity. Child Development
Perspectives, 9(3), 138-143.
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Lincoln, 11.04.2018
Slide 4
Individual Differences in Environmental Sensitivity
Diathesis-Stress/Dual Risk Model
Resilient
Vulnerable
Le
vel
of
Fu
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high
low
Time
Individual A
Individual B
Negative
InfluenceProtective Factors
Risk Factors
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Lincoln, 11.04.2018
Slide 5
Individual Differences in Environmental Sensitivity
Canli, T., & Lesch, K. P. (2007). Long story short: the serotonin transporter in emotion regulation
and social cognition. Nature Neuroscience
Serotonin Transporter Polymorphism
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Lincoln, 11.04.2018
Slide 6
Individual Differences in Environmental Sensitivity
Serotonin Transporter Polymorphism
L/L S/L S/S
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Lincoln, 11.04.2018
Slide 7
Individual Differences in Environmental Sensitivity
Example: Genetic Factors
Serotonin Transporter (5-HTTLPR)
Caspi, A., Sugden, K., Moffitt, T. E., Taylor, A., Craig, I. W., Harrington, H., et al. (2003). Influence of life
stress on depression: moderation by a polymorphism in the 5-HTT gene. Science, 301(5631), 386-389.
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Lincoln, 11.04.2018
Slide 8
Individual Differences in Environmental Sensitivity
From Diathesis-Stress to Differential Susceptibility
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Lincoln, 11.04.2018
Slide 9
Individual Differences in Environmental Sensitivity
Differential Susceptibility
Jay Belsky (1997;2005); Belsky & Pluess (2009; 2013)• Related to Biological Sensitivity to Context (Boyce & Ellis, 2005)
Based on evolutionary theory
1. People differ in their degree of environmental sensitivity
2. Some are generally more and some generally less susceptible
3. To effects of both negative and positive environmental experiences
Belsky, J. & Pluess, M. (2009). Beyond Diathesis-Stress: Differential Susceptibility to
Environmental Influences. Psychological Bulletin, 135(6), 885-908.
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Slide 10
Individual Differences in Environmental Sensitivity
Differential Susceptibility
Time
Lev
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high
low
Time
Negative
Influence
Positive
Influence
Individual A
Individual B
Individual A
Individual BLow
Sensitivity
High
Sensitivity
Sensitivity Factors
Belsky, J. & Pluess, M. (2009). Beyond Diathesis-Stress: Differential Susceptibility to
Environmental Influences. Psychological Bulletin, 135(6), 885-908.
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Slide 11
Individual Differences in Environmental Sensitivity
Sensitivity Factors
Extensive review of empirical studies revealed associations between heightened environmental sensitivity and three categories of individual characteristics:
1. Psychological Factors
e.g., infant temperament
2. Physiological Factors
e.g., cortisol reactivity
See Boyce & Ellis (2005) Biological Sensitivity to Context
3. Genetic Factors
e.g., serotonin transporter polymorphism
Belsky, J. & Pluess, M. (2009). Beyond Diathesis-Stress: Differential Susceptibility to
Environmental Influences. Psychological Bulletin, 135(6), 885-908.
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Slide 12
Individual Differences in Environmental Sensitivity
Empirical Evidence for Differential Susceptibility
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Slide 13
Individual Differences in Environmental Sensitivity
Empirical Evidence
Serotonin Transporter (5-HTTLPR)
Caspi, A., Sugden, K., Moffitt, T. E., Taylor, A., Craig, I. W., Harrington, H., et al. (2003). Influence of life
stress on depression: moderation by a polymorphism in the 5-HTT gene. Science, 301(5631), 386-389.
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Lincoln, 11.04.2018
Slide 14
Individual Differences in Environmental Sensitivity
Empirical Evidence
Serotonin Transporter (5-HTTLPR)
Taylor, S. E. et al. (2006). Early family environment, current adversity, the serotonin transporter promoter
polymorphism, and depressive symptomatology. Biological Psychiatry, 60(7), 671-676.
(Figure 1, redrawn)
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Lincoln, 11.04.2018
Slide 15
Individual Differences in Environmental Sensitivity
Empirical Evidence
Serotonin Transporter (5-HTTLPR)
Drury, S. S., Gleason, M. M., Theall, K. P., Smyke, A. T., Nelson, C. A., Fox, N. A., & Zeanah, C. H. (2012).
Genetic sensitivity to the caregiving context: The influence of 5httlpr and BDNF val66met on
indiscriminate social behavior. Physiology and Behavior, 106(5), 728-735.
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Lincoln, 11.04.2018
Slide 16
Individual Differences in Environmental Sensitivity
Empirical Evidence
Difficult Temperament in Infancy
Pluess, M., & Belsky, J. (2009). Differential Susceptibility to Rearing Experience: The Case of Childcare.
Journal of Child Psychology and Psychiatry and Allied Disciplines, 50(4), 396-404.
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Slide 17
Individual Differences in Environmental Sensitivity
From Differential Susceptibility to Vantage Sensitivity
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Slide 18
Individual Differences in Environmental Sensitivity
Two Sides to Differential Susceptibility
Time
Lev
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low
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Negative
Influence
Positive
Influence
Individual A
Individual B
Individual A
Individual B
Diathesis-Stress
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Slide 19
Individual Differences in Environmental Sensitivity
Vantage Sensitivity short for advantage a position, condition, or opportunity that is likely to
provide superiority or an advantageThe American Heritage Dictionary of the English Language, 2000
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Slide 20
Individual Differences in Environmental Sensitivity
Vantage Sensitivity
Lev
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high
low
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Individual A
Individual B
Positive
Influence
Vantage Sensitivity Factors
Vantage Resistance Factors
Vantage Sensitivity
Vantage Resistance
Pluess, M., & Belsky, J. (2013). Vantage Sensitivity: Individual Differences in Response to Positive
Experiences. Psychological Bulletin, 139(4), 901-916. doi: 10.1037/a0030196
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Slide 21
Individual Differences in Environmental Sensitivity
Empirical Evidence for Vantage Sensitivity
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Slide 22
Individual Differences in Environmental Sensitivity
Empirical Evidence
Serotonin Transporter (5-HTTLPR)
Morgan, B., Kumsta, R., Fearon, P., Moser, D., Skeen, S., Cooper, P., ... & Tomlinson, M. (2017). Serotonin
transporter gene (SLC6A4) polymorphism and susceptibility to a home-visiting maternal-infant attachment
intervention delivered by community health workers in South Africa: Reanalysis of a randomized
controlled trial. PLoS medicine, 14(2), e1002237.
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Lincoln, 11.04.2018
Slide 23
Individual Differences in Environmental Sensitivity
Empirical Evidence
Infant Temperament
Ramchandani, P. G., van IJzendoorn, M. H., & Bakermans-Kranenburg, M. J. (2010). Differential
susceptibility to fathers' care and involvement: The moderating effect of infant reactivity. Family Science,
1(2), 93-101
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Slide 24
Individual Differences in Environmental Sensitivity
Mechanisms of Environmental Sensitivity
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Slide 25
Individual Differences in Environmental Sensitivity
Mechanisms of Environmental Sensitivity
Genes Psychology
Physiology
The „Neurosensitivity“ Hypothesis
• Some individuals have a more sensitive central nervous system on which experiences register more easily and more deeply (Aron, 1996; Belsky, 2005; Belsky & Pluess, 2009)
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Slide 26
Individual Differences in Environmental Sensitivity
Amygdala
Genes and Amygdala Reactivity
• Amygdala is part of the limbic system with primary role in the processing and memory of emotional reactions
• Sensitivity genes are related to amygdala reactivity: 5-HTTLPR short allele
MAOA low activity allele
COMT met allele
Hariri, A. R., E. M. Drabant, K. E. Munoz, B. S. Kolachana, V. S. Mattay, M. F. Egan, et al. A
susceptibility gene for affective disorders and the response of the human amygdala. Archives of
General Psychiatry 2005; 62(2), 146-152.
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Slide 27
Individual Differences in Environmental Sensitivity
The Neurosensitivity Hypothesis
http://brainspan.co.uk/index.htm
Psychology
Physiology
Genes BehaviourSensitivity
Pluess, M., Stevens, S., & Belsky, J. (2013). Differential Susceptibility: Developmental and Evolutionary
Mechanisms of Gene-Environment Interactions. In M. Legerstee, D. W. Haley & M. H. Bornstein (Eds.), The
Infant Mind: Origins of the Social Brain. New York: Guilford.
5-HTTLPR
DRD2
BDNF
Environment
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Slide 28
Individual Differences in Environmental Sensitivity
Empirical Evidence
Amygdala Volume
Pluess, M., De Brito, S. A., Jones, A., Plomin, R., McCrory, E., & Viding, E. (in preparation). Differential
Susceptibility to the Early Environment as a Function of Individual Differences in Brain Structure.
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Slide 29
Individual Differences in Environmental Sensitivity
Phenotype of Environmental Sensitivity
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Slide 30
Individual Differences in Environmental Sensitivity
• Common personality trait:
more aware of subtleties in his/her surroundings
processing experiences more deeply
is more easily overwhelmed when in a highly stimulating environment
• Facets of SPS:
Behavioural Inhibition
Sensory Sensitivity
Depth of Cognitive Processing
Emotional/Physiological Reactivity
Phenotype of Environmental Sensitivity
Aron, E. N., Aron, A., & Jagiellowicz, J. (2012). Sensory processing sensitivity: a review in the light of the
evolution of biological responsivity. Personality and Social Psychology Review, 16(3), 262-282.
Sensory Processing Sensitivity
• Elaine Aron (1996)
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Slide 31
Individual Differences in Environmental Sensitivity
High Sensitive Personality Scale
Original scale with 27 items (Aron & Aron, 1997)
• Brief versions for adults and children (Pluess et al., 2017)
Pluess, M., Assary, E., Lionetti, F., Lester, K. J., Krapohl, E., Aron, E., & Aron, A. (2017). Environmental
Sensitivity in Children: Development of the Highly Sensitive Child Scale and Identification of
Sensitivity Groups. Developmental Psychology.
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Slide 32
Individual Differences in Environmental Sensitivity
Heritability of Environmental Sensitivity
• Born to be Sensitive? (Assary et al., in preparation)
47% explained by heritable factors
53% explained by environmental factors
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Slide 33
Individual Differences in Environmental Sensitivity
Dandelions
• Less sensitive
• Majority (80%)
Orchids
• Highly sensitive
• Minority (20%)
Boyce, W. T., & Ellis, B. J. (2005). Biological sensitivity to context: I. An evolutionary-developmental theory
of the origins and functions of stress reactivity. Development and Psychopathology, 17(2), 271-301.
Sensitivity Groups
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Slide 34
Individual Differences in Environmental Sensitivity
Sensitivity Groups
Evidence for different sensitivity groups?
• Latent Class Analysis (N = 901 undergraduate students)
30.5% 40.3% 29.2%
Lionetti, F., Aron, A., Aron, E., Burns, G. L., Jagiellowicz, J. & Pluess, M. (2018). Dandelions, Tulips,
and Orchids: Evidence for the Existence of Low, Medium, and High Sensitive Individuals in the
General Population. Translational Psychiatry.
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Slide 35
Individual Differences in Environmental Sensitivity
Does High Sensitivity Moderate Environmental
Effects?
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Slide 36
Individual Differences in Environmental Sensitivity
HSC and Response to Intervention
Resilience Intervention
**
Pluess, M., & Boniwell, I. (2015). Sensory-Processing Sensitivity predicts treatment response to a
school-based depression prevention program: Evidence of Vantage Sensitivity. Personality and
Individual Differences, 82(0), 40-45.
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Slide 37
Individual Differences in Environmental Sensitivity
HSC and Response to Intervention
Anti-Bullying Intervention (Kiva)
• N = 931 (control = 461; treatment = 460)
• Significant interaction: group X time X HSC X gender
Nocentini, A., Menesini, E., & Pluess, M. (in revision). Environmental Sensitivity Predicts Treatment
Response to Anti-Bullying Intervention: Evidence of Vantage Sensitivity.
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Slide 38
Individual Differences in Environmental Sensitivity
Sensitivity Types
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Slide 39
Individual Differences in Environmental Sensitivity
Differential Susceptibility
Patterns of Environmental Sensitivity
Time
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high
low
Time
Negative
Influence
Positive
Influence
Genotype A
Genotype B
Gennotype A
Genotype B
Pluess, M. (2015). Individual Differences in Environmental Sensitivity. Child Development Perspectives.
Diathesis-Stress Vantage Sensitivity
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Slide 40
Individual Differences in Environmental Sensitivity
Sensitivity Types
Empirical evidence for Vulnerability, Differential Susceptibility and Vantage Sensitivity
• Are there four types of individuals?
1. Generally low sensitive low susceptibility to both negative and positive influences
2. Generally high sensitive high susceptibility to both negative and positive influences
3. Vulnerable high sensitivity to exclusively negative influences
4. Vantage Sensitive high sensitivity to exclusively positive influences
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Lincoln, 11.04.2018
Slide 41
Individual Differences in Environmental Sensitivity
Sensitivity Types
Empirical evidence for Vulnerability, Differential Susceptibility and Vantage Sensitivity
• Are there four types of individuals?
Pluess, M. (2015). Individual Differences in Environmental Sensitivity. Child Development Perspectives.
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Lincoln, 11.04.2018
Slide 42
Individual Differences in Environmental Sensitivity
Development of Sensitivity Types
Environmental Sensitivity has a significant genetic component
• Several hundred GxE studiesprovide evidence that candidate genes are associated with Environmental Sensitivity
However...
• Meta-analysis suggests that 5-HTTLPR moderates effects of early but not late adversity (Karg et al., 2011)
• Findings extend to positive childhood experiences (van IJzendoorn et al., 2012)
→ Importance to consider developmental aspects
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Lincoln, 11.04.2018
Slide 43
Individual Differences in Environmental Sensitivity
good poor
Development of Sensitivity Types
Hypothesis: Quality of early environment predicts sensitivity to later environmental quality in individuals that carry sensitivity genes
Study:• Data: NCDS
N = 7,075-13,927
• Environmental Quality:
Social class
Employment
Financial problems
Owning house
• Outcome: Malaise
• Assessments
7, 11, 16 years
23, 33, 42, 50 yearsKeers, R., & Pluess, M. (2017). Childhood quality influences genetic sensitivity to environmental
influences across adulthood: A life-course Gene × Environment interaction study. Development and
Psychopathology, 29(5), 1921-1933.
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Lincoln, 11.04.2018
Slide 44
Individual Differences in Environmental Sensitivity
More genetically sensitive
good poor
Development of Sensitivity Types
Genetic Moderation
• Polygenic candidate gene score based on nine polymorphisms previously associated with sensitivity: 5-HTTLPR, BDNF, HTR2A, NR3C2, COMT, NGF, OPRM1, DRD2, FKBP5
• Significant ExExG interaction (p<.001)
Less genetically sensitive
good poor
Keers, R., & Pluess, M. (2017). Childhood quality influences genetic sensitivity to environmental
influences across adulthood: A life-course Gene × Environment interaction study. Development and
Psychopathology, 29(5), 1921-1933.
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Lincoln, 11.04.2018
Slide 45
Individual Differences in Environmental Sensitivity
Implications
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Lincoln, 11.04.2018
Slide 46
Individual Differences in Environmental Sensitivity
Implications
Given that individuals differ in their degree of Environmental Sensitivity:
• Some individuals will be less affected by environmental influences:
More resilient to adverse experiences
Less responsive to positive experiences
• Some individuals will be more affected by environmental influences:
More vulnerable to adverse experiences
More responsive to positive experiences
→ Adverse experiences will not harm all individuals to the same degree!
→ Supportive experiences will not benefit all individuals to the same degree!
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Lincoln, 11.04.2018
Slide 47
Individual Differences in Environmental Sensitivity
Conclusion
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Slide 48
Individual Differences in Environmental Sensitivity
→ Suggesting a more sensitive central nervous system as a mechanism of heightened Environmental Sensitivity
→ Substantial variability in response to environmental influences should be expected (norm rather than exception)!
→ As a function of genetic, physiological and psychological factors
→ People differ in their Environmental Sensitivity with some being more affected by negative and/or positive environmental influences
Conclusion
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Michael Pluess, Ph.D.Department of Biological and Experimental Psychology, Queen Mary University of London, United Kingdom
Email: [email protected] Website: www.michaelpluess.com
Thank you for your attention!