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Look carefully at the centre circles on both the left and right. Which circle is bigger?

Are you sure they aren't both the same size?

This relative size illusion is called the Ebbinghaus illusion. It was discovered by Hermann Ebbinghaus, a German psychologist, in the early 1900s.

• Visual perception is a creation in our own mind. • One person’s reality may not match another's. • We cannot assume that everybody sees things the same way. • Our brain determines “the best interpretation” of the available sensory information.

How many legs does this elephant have?

The impossible elephant was drawn by American cognitive scientist Roger N. Shepard.

What do you see below?

A lady or a musician?

See both?

Are the two purple lines parallel or are they bent?

Read the following passage:

Did you catch the two "The"s? Most people miss this obvious redundancy.

What do you see?

Pictographic Ambiguity

Leaning Towers

Which tower leans more and why?

Ames Room Illusion

Resources:: 377/visual-perceptionflash-cards/ Note: You can get quizlet as an app for your iPhone, iPad or Android.

Muller-Lyer Illusion

Rotating Window Illusion

Face Blindness

An Introduction to Visual Perceptiion  

A brief presentation which introduces visual perception. Highlights how not everybody sees the world in the same way, through exploring some...