The investigation of ear asymmetry by simple and disjunctive reaction-time tasks

In a disjunctive reaction-time task in which Ss responded to clicks presented to one ear while white noise was presented to the other, RT was significantly faster to stimuli presented to the left ear than to the right ear. In a simple reaction-time task, using the same stimuli. there was no difference in R T to stimuli presented to right or left ear. The results were discussed in relation to functional asymmetry of the cerebral hemispheres. and were taken to support a perceptual interpretation of the ear asymmetry effect.