Whalen, D. H. (1991). Subcategorical phonetic mismatches and lexical access. Perception and Psychophysics, 50(4), 351-360.
Presentation: Renee
Summary: Shelly
This study intended to investigate the status of phonetic detail and lexical access in speech perception. There have been controversies about how the two phases are processed in perception. Some assumed that phonetic detail processing is prior to lexical retrieval, while some others proposed that when lexical access is available, the sensitivity toward phonetic detail is not necessary. Two experiments were done in this study to see which of the two propositions was more likely. Experiment 1 used the lexical decision task to examine the effect of phonetically mismatched words on speech process. Sound s and sh were used for mismatching (eg., substitute the s in mess to the sh in mesh). The result showed that phonetic mismatches indeed affected the decision times for distinguishing words and non-words. Subjects needed more time to judge whether the stimulus was a word or not when it was a phonetically mismatched word, indicating that the phonetic processing was prior to lexical processing. Experiment 2 used the auditory naming task, requiring subjects to repeat what they heard. The stimuli were those used in Experiment 1. Results showed that mismatched stimuli would slow down the naming task, which supported the finding in Experiment 1, suggesting that phonetic processing would come first whether or not the lexical information was available. Both experiments supported the proposition of phonetic involvement in speech process.
Summary: Shelly
This study intended to investigate the status of phonetic detail and lexical access in speech perception. There have been controversies about how the two phases are processed in perception. Some assumed that phonetic detail processing is prior to lexical retrieval, while some others proposed that when lexical access is available, the sensitivity toward phonetic detail is not necessary. Two experiments were done in this study to see which of the two propositions was more likely. Experiment 1 used the lexical decision task to examine the effect of phonetically mismatched words on speech process. Sound s and sh were used for mismatching (eg., substitute the s in mess to the sh in mesh). The result showed that phonetic mismatches indeed affected the decision times for distinguishing words and non-words. Subjects needed more time to judge whether the stimulus was a word or not when it was a phonetically mismatched word, indicating that the phonetic processing was prior to lexical processing. Experiment 2 used the auditory naming task, requiring subjects to repeat what they heard. The stimuli were those used in Experiment 1. Results showed that mismatched stimuli would slow down the naming task, which supported the finding in Experiment 1, suggesting that phonetic processing would come first whether or not the lexical information was available. Both experiments supported the proposition of phonetic involvement in speech process.
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