warm up #8 how many pegs do you see? can you change your perception to see the other number? why...

Warm Up #8

• How many pegs do you see?

• Can you change your perception to see the other number? Why does this happen?

Unit 4 Perception Perception pt. 2

http://www.psychologie.tu-dresden.de/i1/kaw/diverses%20Material/www.illusionworks.com/index.html

Perceptiona process of organizing and interpreting

sensory information, enabling us to recognize meaningful objects and events

https://www.youtube.com/watch?v=ORoTCBrCKIQ

Perceptual set: a mental predisposition to perceive one thing and not another.

Stare at the dot in the middle. You should see the outer edges of the circle fade away!

Troxler’s fading

It occurs because even if our eyes move a little when we are fixating a point, away from that point, in the perception field, the movements aren’t large enough to observe other elements; in conclusion the neurons remain focused on the main object and our visual system doesn’t involve new ones for the other elements.

Chapter 8http://www.michaelbach.de/ot/

Are the red lines parallel?

http://www.thedesignwork.com/65-amazing-optical-illusion-pictures/

http://www.michaelbach.de/ot/col_lilacChaser/index.html

1 . P a s t e x p e r i e n c e s“ S t a r s p a n g l e d _ _ _ _ _ _ _ _ _ _ _ _ _ _ ”

2 . M o o d s , A t t i t u d e s , a n d V a l u e s

H a v i n g a b a d d a y a n d “ t h i n g s ” s e e m t o s n o w b a l l

3 . N e e d sI f y o u ’ r e h u n g r y , y o u t h i n k a b o u t …

4. What the group believes

W e h a v e a t e n d e n c y t o , “ g o a l o n g w i t h t h e c r o w d . ”

S E E I N G – H E A R I N G – T O U C H I N G – T A S T I N G – S M E L L I N G

'lateral inhibition' - the term used to describe the complex way in which the cells on the back of the retina respond to areas of black and white. There is, however, little point in explaining the theory. Why? Because a few years ago it was shown to be completely untrue, and thus the explanation for the illusion remains a mystery...

Auditory Illusions

If the sounds do not work click here for link.

http://www.appsychology.com/appsychPP/appsychology/Perceptual%20sounds/matchbox.mp3

http://www.appsychology.com/appsychPP/appsychology/Perceptual%20sounds/Phantom_Words.mp3

Depth Perception

• The ability to see 3D space and accurately judge distances…

Psychology, 4/e by Saul Kassin ©2004 Prentice Hall

• Proximity– Seeing 3 pair of lines in A

• Similarity– Seeing columns of orange

and red dots in B

• Continuity– Seeing lines that connect

1 to 2 and 3 to 4 in C

• Closure– Seeing a horse in D

Perceptual Organization Gestalt Laws of Grouping

Continuity• Continuation – Leads the eye along a path. The

principles of continuation is used to lead the viewers attention to a certain area or to connect an object to a specific action

• Closure – The eyes fill in the missing gaps to make the image/object whole.

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Binocular Cues: Depth cues such as retinal disparity that depends on the use of two eyes.

Retinal disparity: Images from the two eyes differ. Try looking at your two index fingers when

pointing them towards each other half an inch apart and about 5 inches directly in front of your eyes. You will see a “finger sausage” as shown in

the inset.

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Monocular CuesRelative Size: If two objects are similar in

size, we perceive the one that casts a smaller retinal image to be farther away.

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Monocular CuesInterposition: Objects that occlude (block)

other objects tend to be perceived as closer.

Rene M

agritte, The Blank Signature, oil on canvas,

National G

allery of Art, W

ashington. Collection of

Mr. and M

rs. Paul Mellon. Photo by R

ichard Carafelli.

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Monocular CuesLinear Perspective: Parallel lines, such as railroad tracks, appear to converge in the distance. The more the lines converge, the

greater their perceived distance.

© T

he New

Yorker C

ollection, 2002, Jack Ziegler

from cartoonbank.com

. All rights reserved.

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Perceptual Constancy

Perceiving objects as unchanging even as illumination and retinal images change.

Perceptual constancies include constancies of shape and size.

Shape Constancy

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Size-Distance Relationship

The distant monster (below, left) and the top red bar (below,

right) appear bigger because of distance

cues.

From Shepard, 1990

Alan C

hoisnet/ The Im

age Bank

Size Constancy:

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Perceptual Constancies

From Shepard, 1990

Alan C

hoisnet/ The Im

age Bank

Size Constancy: