Reaction time to onset and offset of lights and tones: Reactions toward the changed element in a two-element display.

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Abstract
Conducted 2 RT experiments with 20 male and 20 female undergraduates in each. In Exp. I, Ss responded to the onset or offset of one light in a 2-light display. On onset trials, RTs were faster toward the light which went on (changed element) than toward the light which remained off (unchanged element). Similarly, on offset trials, RTs were faster toward the light which went off than toward the light which remained on. Exp. II involved an analogous auditory task which consisted of pressing right- or left-hand keys in response to the onset or offset of a tone in 1 ear. On onset trials, results paralleled Exp. I, while on offset trials RTs were faster on the side of the unchanged element. Results indicate a potent stereotypic tendency to react toward the apparent source of stimulation. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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