slides tutorial 6_week_5_(perecption)_updated_with_results
TRANSCRIPT
Information for Research Report• Participants: 252 First year undergraduates
• Allocated to one of three conditions according to tutorial group
• 80 participants in each of Ancestral and Future, 92 in Modern
• Results: mean proportion of words recalled (standard deviation)
– Ancestral Hunter: .31 (.11)
– Modern Hunter: .28 (.10)
– Future Hunter: .35 (.12)
The mean proportion of words recalled in the Ancestral Hunter condition was significantly higher than the mean for the Modern Hunter condition, t(170) = 2.16 p < .05; and the mean for Future Hunter was significantly higher than for Ancestral Hunter, t(158) = 2.73 p < .05.
NB: You can cut and paste the words written in RED (and only those) in to your research report. Please put the other information into your own words and decide on the best way to display the results.
Dichotic listening task
• What was the information you attended to about?
• What was the information you did not attend to about?
• Complete the following sentences:
– Shortly before presenting the…………
– Why did such a…………
– Consider whether you have ever been……
Dichotic listening task
LEFT EAR: ignore
“Learning.......................
......................................
......................................
......................................
......................................
...................................
RIGHT EAR: shadow
“Perception....................
......................................
......................................
......................................
......................................
......................................
......................................
Dichotic listening task
LEFT EAR: ignore
“Learning.......................
......................................
...YOUR NAME
......................................
.............YOUR NAME
......................................
RIGHT EAR: shadow
“Perception....................
......................................
......................................
......................................
......................................
......................................
......................................
Dichotic listening task
• Can focus attention on a single source ignoring the other sources
• Highly salient (important) information such as your name captures your attention – the “cocktail party” effect
The mirror demonstration illustrates that the visually specified location of a hand
viewed in a mirror significantly biased the felt location of that hand.
This visual recalibration of hand position is greater under active visuomotor experience
than under passive visual experience alone, and increased with increasing duration of
exposure to the multisensory conflict.
This recalibration process depends upon multisensory interactions in brain areas such
as the posterior parietal cortex and premotor cortex, which are sensitive to both the
visually and proprioceptively specified position of the hands in space.
Sensory Interaction: Vision and somatosensation/proprioception
Real
position of
the seen
hand
Real position of
the unseen
hand
Felt position of
the unseen
hand
Mirror
Blind Spot Demonstrations• All demonstrations have a fixation point or a cross on one side and the pattern on the
other side.
• See where the fixation point is and close or cover your eye on that side. Then look at the
fixation point with your other eye.
– Move your head slowly either toward the paper or away from the paper until the
pattern disappears
– When the pattern disappears, you have found your blind spot in that eye.
If fixation point is on
the left side, close
your left eye and
look at the fixation
point with your right
eye.
If fixation point is on
the right side, close
your right eye and look
at the fixation point
with your left eye.
Further things to consider:
1)Once you have succeeded in finding the blind spot for one eye, open the eye
that was kept closed during that period. What happens to the disappeared
image?
2)By applying the same procedure as above, can you make something else (i.e.
any “real” object or part of the scene) disappear in the blind spot?
Stare at the center of the flag for a minute and then shift your eyes to the dot in the white
space beside it. What do you see? (After tiring your neural response to black, green, and
yellow, you should see their opponent colors.) Stare at a white wall and note how the
size of the flag grows with the projection distance!
Change blindness
http://www.gocognitive.net/demo/change-blindness
The following graphic is NOT animated. You may verify this by staring at each of the black centers individually for a few seconds. Its corresponding circle will be seen as it
really is – static.