Instead, he investigated what information is actually presented to the perceptual systems.

A recent example of a perceptual system is given by D. Hall.

They are based on opposing views of how the perceptual system computes size and distance.

Biological perceptual systems have evolved in response to physical properties of natural environments.

So any perceptual system that helps detect an angry man is an advantage.

They observed that the human perceptual system almost completely operates outside of conscious awareness.

Also it seems that modulatiy is learned in perceptual systems.

Without perceptual systems to provide us with knowledge of the outside world we are impotent.

Other issues have derived directly from the study of perceptual systems.

The human perceptual system is not capable of precise color memory.