Editing Cognitive science (section)

===Perception and action===
{{Main|Perception}}
[[Image:Necker cube.svg|thumb|150px|[[The Necker cube]], an example of an optical illusion]]
[[File:Checker shadow illusion.svg|thumb|right|An optical illusion. The square A is exactly the same shade of gray as square B. See [[checker shadow illusion]].]]

Perception is the ability to take in information via the [[senses]], and process it in some way. [[Visual perception|Vision]] and [[hearing]] are two dominant senses that allow us to perceive the environment. Some questions in the study of visual perception, for example, include: (1) How are we able to recognize objects?, (2) Why do we perceive a continuous visual environment, even though we only see small bits of it at any one time? One tool for studying visual perception is by looking at how people process [[optical illusion]]s. The image on the right of a Necker cube is an example of a bistable percept, that is, the cube can be interpreted as being oriented in two different directions.

The study of [[Haptic perception|haptic]] ([[Touch|tactile]]), [[olfactory]], and [[gustatory]] stimuli also fall into the domain of perception.

Action is taken to refer to the output of a system. In humans, this is accomplished through motor responses. Spatial planning and movement, speech production, and complex motor movements are all aspects of action.