Mid-level vision and high-level vision are crucial for understanding a reality that is filled with ambiguous perceptual inputs.

The term is supposed to encompass any intentional change in the perceptual input.

Not, the constructivist argues, by the enrichment of perceptual input (in any case the evidence tells us that this is already rich): only through action itself.

Revonsuo holds that there is a "'double dissociation' between consciousness and perceptual input".

Though their eyes were open, and the perceptual input was accessible, the subjects could not see the stimuli and did not report dreaming of it.

It is the brain that is having the internal experience, independent of perceptual input.

In addition, they may show oscillatory responses to perceptual input or motor output.

These ongoing rhythms can change in different ways in response to perceptual input or motor output.

Information had to flow in just the right way, each perceptual input and internal feedback gently imprinting itself on the network's previous state.

Hume had given persuasive logical arguments that people cannot infer causality from perceptual input.