Perception and the Temporal Properties of Speech.
Final rept. Jul 1989-Jul 1992,
HARVARD UNIV CAMBRIDGE MA DEPT OF PSYCHOLOGY
Pagination or Media Count:
This research examines the interaction of acoustic and lexical information in the identification of words in lexically ambiguous phoneme sequences. In Experiment 1, subjects show priming for the meaning of a large word like tulips when presented with a sequence of combinable short words like two lips. In Experiment 2 priming is found for the meaning of the second short word in similar sequences e.g. lips in two lips . Finally, Experiment 3 demonstrates that listeners do not show priming for a short word like lips when it is pronounced as part of a larger word like tulips. The results of these experiments show that listeners sometimes access words other than those intended by speakers, and that they may simultaneously access words associated with several alternative parses of ambiguous sequences. Furthermore, they suggest that acoustic marking of word onsets places constraints on the success of lexical access. To account for these results, we present a new model of lexical access and segmentation, the Good Start model, which gives a principled account of these properties.
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