| Abstract | Synthesized nonspeech stimuli that could constitute second-formant transitions in CV syllables, with either ascending or descending resonance frequencies. These were presented monaurally with contralateral noise to sixteen 18-25 yr old strongly right-handed subjects, and reaction times for stimulus identification were measured. Results show that reaction times were 12.8 msec faster when the stimulus was presented to the left ear than to the right ear, suggesting right-hemisphere involvement in the processing of these stimuli. This result suggests that rapid temporal variation is not a sufficient stimulus property to invoke left-hemisphere processing. The roles of acoustic structure of the stimulus and coding strategies of the subject are considered as factors that may determine lateralized hemispheric processing. |
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