Illusions and Constancies

Perceptual Interpretation• Learning Goals:

– Students should be able to answer the following:

1. What does research on sensory deprivation and restored vision reveal about the effects of experience on perception?

2. How adaptable is our ability to perceive?

3. How do our expectations, contexts and emotions influence our perceptions?

1

Rating Student Evidence

4.0 Expert

I can teach someone else about the components of perceptual interpretation In addition to 3.0 , I can demonstrate applications and inferences beyond what was taught

3.0Proficient

I can analyze the components of perceptual interpretation, and compare/contrast the Aspects of the learning goal.

2.0 Developing

I can identify terms associated with components of perceptual interpretation, but need to review this concept more.

1.0Beginning

I don’t understand this concept and need help!

Taste/Smell

The EarSound

Depth cuesGestaltPerceptionMovementTouch/Pain

SeeingThe EyeLightIgnoring CNS

Illusions

Stroboscopic Motion and Phi Phenomenon

• Stroboscopic Motion: 24 still pictures flashing within

one second create the illusion of motion (example:

flip books and cartoons)

• The phi phenomenon is the optical illusion of perceiving

continuous motion between separate objects viewed

rapidly in succession.(example: neon or scrolling

signs)

2

Sensation1.ppt#2. Links to Learning Objectives


http://www.apa.org/

http://www.apa.org/

http://www.google.com/


http://media.pearsoncmg.com/ph/hss/livepsych/start.htm


http://www.psychologicalscience.org/


http://wps.prenhall.com/hss_ciccarelli_psychology_1/0,7827,2748307-,00.html


Taste/Smell

The EarSound



Illusions

Phi Phenomenom



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Halloween Phi Phenomenon



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Shape Constancy

Perceiving objects as unchanging even as illumination and retinal images change. Perceptual constancies include constancies of shape and size.

5Shape Constancy



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Size Constancy

Stable size perception amid changing size of the stimuli. We know the one car is just farther away, but still the same size.

6



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Size-Distance Relationship

The distant monster (below, left) and the top red bar (below, right) appear bigger because of distance cues.

7

The moon appears larger

on the horizon because

of context effects make it look

farther away like the monster

Ponzo Illusion



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions


8



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions


9



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Ames Room

10

The Ames room is designed to demonstrate the size-distance illusion.



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Lightness Constancy

11

The color and brightness of square A and B are the same.

Lightness

constancy -

enables us to

perceive an

object as

having a

constant

lightness even

when the light

that falls on it

changes.



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Color Constancy

Objects will change color depending on the CONTEXT of surrounding objects or colors

12

Color Constancy



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Perceptual Adaptation

You have the ability to adapt to distortion goggles rather quickly. Usually in a couple of hours to days. Some animals can never adapt.

13



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Inverted Vision



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Muller-Lyer Illusion

15

Illusions provide good examples in understanding how perception is organized. Studying faulty perception is as important as studying other

perceptual phenomena.



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Culture and Perception

16



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Perceptual Set

A mental predisposition to perceive one thing and not another. What you see in the center picture is influenced by flanking pictures.

17

Half the class close your eyes while the other half looks at an image:



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Perceptual Set

18

(a)Loch ness monster or a tree trunk;

(b)Flying saucers or clouds?

(c) The face on mars because of perceptual schema

Other examples of perceptual set.

(c)



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Eye & Mouth Schemas

19



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Eye & Mouth Schemas

20



http://www.apa.org/

http://www.apa.org/









Taste/Smell

The EarSound



Illusions

Motivation and Emotion influence Perception

• Walking destinations look farther way when fatigued

• Hills look steeper when carrying a heavy backpack

• Targets seem father away when throwing a heavy object

• When you are driving you hate pedestrians, when you are a pedestrian you hate drivers

21

If you are rewarded

for seeing a farm

animal, you will see a

farm animal



http://www.apa.org/

http://www.apa.org/









Learning Goal:1. What does research on sensory deprivation and restored vision reveal about

the effects of experience on perception?

2. How adaptable is our ability to perceive?

3. How do our expectations, contexts and emotions influence our perceptions?

22

Rating Student Evidence

4.0 Expert

I can teach someone else about the components of perceptual interpretation In addition to 3.0 , I can demonstrate applications and inferences beyond what was taught

3.0Proficient

I can analyze the components of perceptual interpretation, and compare/contrast the Aspects of the learning goal.

2.0 Developing

I can identify terms associated with components of perceptual interpretatio, but need to review this concept more.

1.0Beginning

I don’t understand this concept and need help!

Illusions and Constancies

Education

Transcript of Illusions and Constancies