title: Expectation both helps and hinders object perception.
abstract: We examined how expectation influences perception of complex objects. Participants discriminated between normal and distorted images of famous faces or places. Word cues (mostly valid) indicated either the general category or the exact identity of the upcoming image pair. Whereas category cues did not affect performance, valid exemplar expectation led to performance benefits. Furthermore, discrimination was slower after exemplar cues from the incorrect category than after invalid exemplar cues from the correct category, indicating costs of invalid category expectation. Thus, expectation of a specific exemplar facilitates perception of that object, but hinders perception of an object from a different category.
authors.affiliation: Center for Neuroscience, University of California, Davis, CA 95618, USA. ampuri@ucdavis.edu
authors.forename: Amrita M
authors.initials: AM
authors.lastname: Puri
authors.forename: Ewa
authors.initials: E
authors.lastname: Wojciulik
mesh_terms: D000328:Adult; D001288:Attention / Q000502:physiology*; D003463:Cues; D004192:Discrimination, Psychological / Q000502:physiology; D005145:Face; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time