Abstract

Monaural and binaural soundbursts varying in intensity (60 to 105 dB(A)) were conjointly presented with a visual two-choice imperative signal that required either a left or right manual response. The soundbursts exerted two effects on reaction time (RT): (1) a facilitating or immediate arousing effect proportional to the intensity of the sound, and (2) an inhibiting or location effect depending on whether the ear of simulation corresponds to the left/right hand reaction. In a second experiment the location effect was investigated with more complex S-R mappings. A critical parameter with regard to occurrence and amount of inhibition appears to be whether the rule about the S-R relations is violated by the location of the accessory sound.

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