Document Detail

Infants' localization of sounds within hemifields: estimates of minimum audible angle.
MedLine Citation:
PMID:  2209194     Owner:  NLM     Status:  MEDLINE    
Infants' acuity in localizing sounds within hemifields was examined by determining the smallest sound shift off 60 degrees and along the horizontal axis that infants could discriminate reliably, that is, minimum audible angle (MAA). Infants 6, 12, and 18 months of age were tested using a Go/No-Go conditioned head-turn procedure in which infants received an equal number of no-change (control) trials and sound-shift (experimental) trials. A correct response (i.e., a head turn toward the loud-speakers) on an experimental trial resulted in visual reinforcement. Localization acuity for sounds within hemifields was fairly poor and improved systematically with increasing age. MAA estimates at each age were significantly higher, indicating poorer localization acuity, in comparison to those obtained previously in research examining infants' resolution of auditory space near midline. These findings are consistent with adult data and demonstrate a finer partitioning of auditory space near midline than within hemifields. The implications of these findings for our understanding of the development of auditory processing mechanisms in sound localization are discussed.
B A Morrongiello; P T Rocca
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Child development     Volume:  61     ISSN:  0009-3920     ISO Abbreviation:  Child Dev     Publication Date:  1990 Aug 
Date Detail:
Created Date:  1990-11-20     Completed Date:  1990-11-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372725     Medline TA:  Child Dev     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1258-70     Citation Subset:  IM    
Department of Psychology, University of Western Ontario, London, Canada.
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MeSH Terms
Age Factors
Child Psychology*
Dominance, Cerebral*
Pilot Projects
Sound Localization*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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