Does lexical information influence the perceptual restoration of phonemes?

Journal/Book: J Exp Psychol-Gen. 1996; 125: 750 First St NE, Washington, DC 20002-4242. Amer Psychological Assoc. 28-51.

Abstract: A critical issue in modeling speech perception is whether lexical representations can affect lower level (e.g., phonemic) processing. Phonemic restoration studies have provided support for such top-down effects, but there have also been a number of failures to find them. The present study provides an account of when such effects will and will not appear. A methodology is introduced that provides good approximations to the underlying distributions of perceived intactness that are assumed in signal detection analyses of restoration. This methodology provides a sensitive means to determine the necessary conditions for lexical feedback to occur. When these conditions are created, a reliable lexical influence on phonemic perception results. The experiments thus show that lexical activation does influence lower level processing, and that these influences are fragile. The theoretical implications of real but fragile lexical effects are discussed.

Note: Article AG Samuel, SUNY Stony Brook, Dept Psychol, Stony Brook, NY 11794 USA

Keyword(s): AUDITORY WORD PERCEPTION; PHONETIC CATEGORIZATION; SPEECH-PERCEPTION; TRACE MODEL; IDENTIFICATION; ILLUSION; CONTEXT; RECOGNITION; ATTENTION; STIMULUS

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