Processing symbolic information from a visual display: Interference from an irrelevant directional cue.

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Abstract
In a choice RT task, 64 undergraduates pressed either a right- or left-hand button in response to directional commands provided by colored lights. In Exp I, the command was presented both monocularly and binocularly. On monocular trials, RT was significantly faster when the symbolic content of the command corresponded to the eye stimulated (corresponding trials) that when it did not (noncorresponding trials). A comparison of monocular with binocular RT indicated that the Command * Eye Stimulated interaction was due to interference on the noncorresponding trials. Results of Exp. II indicated that the source of this interference was not the eye stimulated, but the spatial locus of the command. An initial tendency to react toward the source of stimulation was postulated to explain this interference with information processing. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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