Author: Parks, Theodore; Natsoulas, Thomas
Affiliation: U. California, Davis
Title: Idiosyncratic Exceptions To the Probability-Matching Decision-Rule in Visual Discrimination.
Source: Perception & Psychophysics, 1969. 5 (4): p.209-210
Language: English
Subjects: Thesaurus terms: Expectations Probability Signal Detection (Perception) Visual Discrimination
Added Keywords: detection responses to nonsense stimuli, exposure to & expectation of neutral & taboo stimuli, idiosyncratic exceptions to probability-matching hypothesis
Classification Code: Human Experimental Psychology (2300)
Population Terms: Human
Abstract: Human "yes-no" signal-detection performance was tested under a modified perceptual-defense procedure. A majority of 124 undergraduates tended to match the relative frequency with which they gave affirmative responses to the relative frequency at which signals were presented. These Subjects thereby replicated the "probability-matching" behavior found in previous signal-detection and discrimination studies. In marked contrast to those results, another large set of Subjects showed a tendency toward preponderant use of 1 of the 2 responses (typically, of "no") rather than toward probability matching. Evidence failed to suggest that the latter effect was related to a lesser ability to make the requisite sensory discrimination or to response inhibition induced by taboo stimuli. ((c) 1999 APA/PsycINFO, all rights reserved)