Event-related potentials and selective attention to tones moving in location and pitch: an examination of movement velocity.
Event-related potentials (ERPs) were recorded from subjects who listened selectively to one of two classes of tone pips that arose from separate, virtual sound sources moving in spatial location and pitch. In different runs the speeds of the moving sources were varied; for the slow speed, the two classes of tones were easily separable, but for the moderate and fast speeds selective listening was difficult without practice. A prolonged negative shift of the ERP, beginning around 60 ms poststimulus and lasting over 300 ms, was observed when the eliciting tones were selectively attended. However, no differences at any phase of the negative ERPs were found as a function of movement velocity, in contrast to the decline of target detection performance for the fast speed. The results were interpreted as indicating that anticipation, based on contextual information, can play an important role in early input selection.
Okita
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Department of Science of Behavior, Hyogo College of Medicine, Nishinomiya, Japan.
D000328:Adult; D001288:Attention; D001307:Auditory Perception; D004569:Electroencephalography; D005072:Evoked Potentials, Auditory; D005260:Female; D006801:Humans; D008297:Male; D010897:Pitch Discrimination; D013017:Sound Localization