Full Idea
Psychologists have a lot of evidence to show that perception is a function of expectation.
Gist of Idea
Perception is a function of expectation
Source
John Searle (The Rediscovery of the Mind [1992], Ch. 6.I.7)
Book Reference
Searle,John R.: 'The Rediscovery of the Mind' [MIT 1999], p.136