Expectancy and stimulus frequency: A comparative analysis in rats and humans

Kevin Pang; Fred Merkel; Howard Egeth; David S. Olton

doi:10.3758/BF03211657

Expectancy and stimulus frequency: A comparative analysis in rats and humans

Kevin Pang, Fred Merkel, Howard Egeth, David S. Olton

Krieger School of Arts and Sciences

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We examined whether expectancy, one of several factors influencing attention, is similarly affected in rats and humans by manipulation of relative stimulus frequency, A two-choice reaction time (RT) task was developed for rats, and an analogous task was used for humans. Errors, RTs, discriminability, and response bias were measured. Both rats and humans shifted their response bias to the more frequent stimulus, with no change in overall discriminability. As stimulus probability or stimulus repetition increased, RTs and errors decreased. These results illustrate the similarity of expectancy in rats and humans. This two-choice RT task for rats can be used in future studies to examine the neuronal mechanisms of expectancy and attention.

Original language	English (US)
Pages (from-to)	607-615
Number of pages	9
Journal	Perception & Psychophysics
Volume	51
Issue number	6
DOIs	https://doi.org/10.3758/BF03211657
State	Published - Nov 1992

ASJC Scopus subject areas

Experimental and Cognitive Psychology
Sensory Systems
Psychology(all)

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Expectancy and stimulus frequency: A comparative analysis in rats and humans

Abstract

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