Perceptual Set

What is a perceptual set?

A perceptual set is a readiness to interpret sensory information in a particular way, influenced by expectations or prior learning.

Bruner (1957) describes perceptual readiness in terms of how accessible learned categories are when a person encounters sensory cues. A category that is readily available can guide identification of ambiguous input.

Perceptual set example

A blurred character among numbers may be interpreted as a number, while the same shape among letters may be interpreted as a letter. This illustrates how context can prepare an interpretation of ambiguous input.

Perceptual expectancy, context, and schemas

Perceptual expectancy is the expectation about what one is likely to encounter. Prior experience, the present task, and the surrounding context can prepare a particular interpretation. The APA dictionary describes both a temporary readiness and a perceptual frame or schema. A perceptual set concerns readiness to perceive; a broader schema organizes knowledge that can contribute to that readiness.

Expectations and perception

This is not necessarily an error: expectations can help interpret incomplete information. It is also important to distinguish an effect on a person's report or decision from proof that the earliest sensory processing itself has changed.