School-age children’s environmental object identification in natural auditory scenes: effects of masking and contextual congruence
Krishnan, Saloni and Leech, Robert and Aydelott, Jennifer and Dick, Frederic (2013) School-age children’s environmental object identification in natural auditory scenes: effects of masking and contextual congruence. Hearing Research 300 , pp. 46-55. ISSN 0378-5955.
This study investigated the development of children’s skills in identifying ecologically relevant sound objects within naturalistic listening environments, using a non-linguistic analogue of the classic ‘cocktail-party’ situation. Children aged 7 to 12.5 years completed a closed-set identification task in which brief, commonly encountered environmental sounds were presented at varying signal-to-noise ratios. To simulate the complexity of real-world acoustic environments, target sounds were embedded in either a single, stereophonically presented scene, or in one of two different scenes, with each scene presented to a single ear. Each target sound was either congruent or incongruent with the auditory context. Identification accuracy improved with increasing age, particularly in trials with low signal-to-noise ratios. Performance was most accurate when target sounds were incongruent with the background scene, and when sounds were presented in a single background scene. The presence of two backgrounds disproportionately disrupted children’s performance relative to that of previously tested adults, and reduced children’s sensitivity to contextual cues. Successful identification of familiar sounds in complex auditory contexts is the outcome of a protracted learning process, with children reaching adult levels of performance after a decade or more of experience.
|Keyword(s) / Subject(s):||auditory scene analysis, development, context, masking, environmental sounds|
|School:||Birkbeck Schools and Departments > School of Science > Psychological Sciences|
|Research Centre:||Brain and Cognitive Development, Centre for (CBCD)|
|Date Deposited:||19 Mar 2013 07:38|
|Last Modified:||02 Dec 2016 11:18|
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