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The uniqueness point effect in the shadowing of spoken words

par Radeau, Monique ;Morais, Jose
Référence Speech communication, 9, 2, page (155-164)
Publication Publié, 1990-04

Article révisé par les pairs

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Résumé :

Word shadowing was used in order to obtain evidence concerning the relevance of the uniqueness point (UP, i.e., the moment at which the acoustic-phonetic information already presented remains compatible with a single lexical entry) as a determinant of the point where spoken word recognition occurs. Taken as an average, response latencies showed a minimal but significant effect of the UP. However, there were important differences between items with early and late UPs. A multiple regression analysis, taking UP position, word length and word frequency into account, showed that UP position is the best predictor of the shadowing latencies of early-UP items, but that it does not contribute at all to the shadowing of words with late UP. We conclude that the UP strongly mediates the recognition of spoken words with early UP. In addition, the shadowing of late-UP items is best predicted by word length in slower, and by word frequency in faster subjects; this suggests the intervention of different mechanisms. © 1990.