Perceptual Constancies

• Size Constancy-  within a certain range, people's perception of one particular objects' size will not change, regardless of changes in distance or the video size change on the retina.

  In the picture below, it looks as if a larger man is chasing a smaller man, but in reality, the two men are absolutely identical.
    

• Brightness Constancy- refers to our ability to recognize that color remains the same regardless of how it looks under different levels of light.

In the picture below, try to match one of the boxes to the right of the line that is the same shade of color to the box on the left side of the line.

• Shape Constancy- is the tendency to perceive an object as having the same shape regardless of its orientation or the angle from which we look at it.

An example of shape constancy is show in the picture below.