Abstract:
:A combination of lexical bias and altered auditory feedback was used to investigate the influence of higher-order linguistic knowledge on the perceptual aspects of speech motor control. Subjects produced monosyllabic real words or pseudo-words containing the vowel [ε] (as in "head") under conditions of altered auditory feedback involving a decrease in vowel first formant (F1) frequency. This manipulation had the effect of making the vowel sound more similar to [I] (as in "hid"), affecting the lexical status of produced words in two Lexical-Change (LC) groups (either changing them from real words to pseudo-words: e.g., less-liss, or pseudo-words to real words: e.g., kess-kiss). Two Non-Lexical-Change (NLC) control groups underwent the same auditory feedback manipulation during the production of [ε] real- or pseudo-words, only without any resulting change in lexical status (real words to real words: e.g., mess-miss, or pseudo-words to pseudo-words: e.g., ness-niss). The results from the LC groups indicate that auditory-feedback-based speech motor learning is sensitive to the lexical status of the stimuli being produced, in that speakers tend to keep their acoustic speech outcomes within the auditory-perceptual space corresponding to the task-related side of the word/non-word boundary (real words or pseudo-words). For the NLC groups, however, no such effect of lexical status is observed.
journal_name
Front Hum Neuroscijournal_title
Frontiers in human neuroscienceauthors
Bourguignon NJ,Baum SR,Shiller DMdoi
10.3389/fnhum.2014.00208subject
Has Abstractpub_date
2014-04-17 00:00:00pages
208issn
1662-5161journal_volume
8pub_type
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