title: Unitary classification in a comparison task.
abstract: Sequential effects were used to diagnose whether elements in a two-object comparison task are represented as a perceptual unit or separately. The presence of sequential effects and absence of influences of individual elements on the subsequent trial in a successive comparison task favor the hypothesis that the elements in a pair are represented as a unit, and that a response is made to the perceptual unit. The patterns of response times on same and different trials differed in several ways; these suggested that the quality of the representations of same and different trials may differ.
authors.affiliation: State University of New York, Binghamton.
authors.forename: X
authors.initials: X
authors.lastname: Li
authors.forename: A F
authors.initials: AF
authors.lastname: Smith
mesh_terms: D000328:Adult; D001288:Attention; D004193:Discrimination Learning; D006801:Humans; D011939:Mental Recall; D010364:Pattern Recognition, Visual; D011340:Problem Solving; D011601:Psychophysics; D011930:Reaction Time