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.

Psychology 1011

Perception

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

Are squares A and B the same colour?

Squares A and B are the same colour

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.

ALL the lines are straight!

Do the middle circles appear to be of the same size?

Are the two table tops identical?

Perception

• A selective filtering system, not a simple replication of what is out there.

• Visual illusions – our senses are fallible (even when we KNOW & EXPECT illusions, we may still be mistaken.)

• How & what we perceive influences how we think and vice versa.