Title

Stimulus Overselectivity in a Match-to-Sample Paradigm bySeverely Retarded Youth

Document Type

Article

Journal/Book Title/Conference

Analysis and Intervention in Developmental Disabilities

Volume

2

Issue

4

Publication Date

1982

First Page

273

Last Page

304

Abstract

Exp 1 investigated the occurrence of overselectivity in 4 severely retarded 15–18 yr olds (MA 2.4–3.5 yrs) within a match-to-sample paradigm. Temporal delay between offset of the sample item and onset of choice items was systematically manipulated. The multiple cue stimulus used was a picture with dimensions of color, shape, and border. Probe trials were designed to delineate the factors controlling responding. Results suggest that overselective responding occurred and was most evident with increasing delays between removal of the sample and presentation of choices. Ss typically responded to only 1 dimension on probes designed to examine responding to individual dimensions of the compound stimulus. On other probes, however, Ss discriminated additional dimensions. Exp II, with 3 of the Ss from Exp I, examined the effect of training individual dimension discriminations and training on different temporal delays within 1 match-to-sample task on the remediation of overselectivity in another match-to-sample task. Generalized remediation on probes that examined responding to individual dimensions clearly increased after Ss (a) were trained to separately discriminate the individual components of a multiple cue stimulus and (b) had been taught this discrimination in the presence of a temporal delay. (16 ref)

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