Duplex perception: Some initial findings concerning its neural basis

Jacquelyn Cranney, Carol A. Fowler, Frank Musiek

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Duplex perception is the simultaneous perception of a speech syllable and of a nonspeech "chirp" and occurs when a single formant transition and the remainder (the "base") of a synthetic syllable are presented to different ears. The current study found a slight but nonsignificant advantage for correct labeling of the fused syllable when the chirp was presented to the left ear. This advantage was amplified in the performance of a "split-brain" subject. A subject with a left pontine lesion performed at chance level when the chirp was presented to her left ear. These findings suggest that some, if not complete, ipsilateral suppression does occur in the dichotic fusion procedure, and that identification of the fused syllable is maximal when the left hemisphere fully processes the linguistic characteristics of the base (through contralateral presentation), and at least minimally processes the frequency transition information of the chirp (through ipsilateral presentation).

Original languageEnglish (US)
Pages (from-to)48-56
Number of pages9
JournalBrain and Cognition
Volume9
Issue number1
DOIs
Publication statusPublished - 1989
Externally publishedYes

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ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Experimental and Cognitive Psychology
  • Neuropsychology and Physiological Psychology

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