Citation

Klingstone A, Klein R. J. Exp. Psychol. Hum. Percept. Perform. 1991; 17(2): 512-519.

Affiliation

Age and Cognitive Performance Research Center, University of Manchester, England.

Copyright

(Copyright © 1991, American Psychological Association)

DOI

unavailable

PMID

1830089

Abstract

Two experiments report the effects of generating a concurrent position expectancy and form expectancy. Ss were precued to a stimulus position where 1 target shape was most probable, and they made a speeded 2-choice response to the orientation of the displayed shape. Response time (RT) was faster for an expected position than an unexpected position and faster for a likely shape than for an unlikely shape. This replicates the work of Lambert and Hockey (1986). It was also observed, however, that when a stimulus appeared at an unexpected position where 2 shapes were equally improbable, RT was slower for the shape that had been likely rather than unlikely at the cued position. This finding is incompatible with the probability-matching hypothesis of Lambert and Hockey. The data support a hierarchical-expectancy model of attentional selectivity.

Language: en