Chapter 5 - Visual Illusion

Question 1

What is visual illusion?

Answer 1

A perception which consistently differs from objective reality

Question 2

Muller Lyer illusion

Answer 2

Whether the line has feathered ends or arrow heads changes your perception of the length of the line

Question 3

Ponzo illusion

Answer 3

The upper horizontal line is perceived as longer then the lower horizontal line. This is because it casts the same-size image on the retina, we perceive the ‘more distant’ line to be longer

Question 4

Ames Room illusion

Answer 4

The Ames Room illusion shows us that we maintain shape constancy at the expense of size constancy

Question 5

Gestalt Principles

Answer 5

Phi Phenomenon - eg cartoon
Figure Ground - contour line
Camouflage - blends into background
Closure - when we perceive an object as a whole despite it being incomplete
Similarity - group together to provide a ‘whole’ single unit. Rows of triangles and circles rather then individual
Proximity - individual parts are close to each other we tend to perceive them as ‘whole’