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ERIC Number: EJ815848
Record Type: Journal
Publication Date: 2008-Oct
Pages: 6
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0010-0277
Lexical Effects on Speech Perception in Individuals with "Autistic" Traits
Stewart, Mary E.; Ota, Mitsuhiko
Cognition, v109 n1 p157-162 Oct 2008
It has been claimed that Autism Spectrum Disorder (ASD) is characterized by a limited ability to process perceptual stimuli in reference to the contextual information of the percept. Such a connection between a nonholistic processing style and behavioral traits associated with ASD is thought to exist also within the neurotypical population albeit in a more subtle way. We examined this hypothesis with respect to auditory speech perception, by testing whether the extent to which phonetic categorization shifts to make the percept a known word (i.e., the "Ganong effect") is weakened as a function of autistic traits in neurotypicals. Fifty-five university students were given the Autism-Spectrum Quotient (AQ) and a segment identification test using two word-to-nonword Voice Onset Time (VOT) continua ("kiss-giss" and "gift-kift"). A significant negative correlation was found between the total AQ score and the identification shift that occurred between the continua. The AQ score did not correlate with scores on separately administered VOT discrimination, auditory lexical decision, or verbal IQ, thus ruling out enhanced auditory sensitivity, slower lexical access or verbal intelligence as explanations of the AQ-related shift in phonetic categorization. (Contains 2 figures and 3 tables.)
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A