Abstract

Twenty-eight subjects (15 male, 13 female) performed a visual/auditory cross-modal matching task involving same/different judgements of CVC nonsense syllables. In the visual modality stimuli were presented either unilaterally or at the midline, and in the auditory modality, binaurally or monaurally—giving nine combinations of simultaneous input. Predictions for RT under each condition were derived by aggregating the assumed effects of single modality lateralized presentation on the basis of a simplistic anatomical model. An unpredicted ear X visual-field interaction emerged which, it is speculated, may in part reflect the operation of transcallosal inhibitory effects. Cross-modal matching is proposed as a paradigm for future investigations of interhemispheric integration.

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