The external world, understood in the first instance as the world of natural objects, is independent of conceptual schemes and perceptual apparatuses.

Since music exists in part to tweak the human perceptual apparatus, that should be fun.

"Binoculars," a perceptual apparatus that the viewer peers into, blends five different colors with the aid of mirrors and fluorescent light fixtures.

An image (C mod R) captures the notion of an observed Configuration, as opposed to one which exists independently from any perceptual apparatus.

A deformation is a transformation of the original image that accounts for the noise in the environment and error in the perceptual apparatus.

The only errors noted were presumed to have been a misunderstanding of the task during the first few trials, and not an inability of the dolphin's perceptual apparatus.

Our perceptual apparatus picks up this sort of signal all of the time.

The four parts are the perceptual apparatus, the input analysers, the motivational and behavioural controllers, and the energy regulator.

As he did so, something even more unsettling was happening to my perceptual apparatus.

Our perceptual apparatus, ever alert for novel stimuli, responds to the rough edges.