Pitch memory, labelling and disembedding in autism.
Heaton P.
Department of Psychology, Goldsmiths College, University of London, New Cross,
London, UK. P.Heaton@gold.ac.uk
BACKGROUND: Autistic musical savants invariably possess absolute pitch ability
and are able to disembed individual musical tones from chords. Enhanced pitch
discrimination and memory has been found in non-savant individuals with autism
who also show superior performance on visual disembedding tasks. These
experiments investigate the extent that enhanced disembedding ability will be
found within the musical domain in autism. METHOD: High-functioning children
with autism, together with age- and intelligence-matched controls, participated
in three experiments testing pitch memory, labelling and chord disembedding.
RESULTS: The findings from experiment 1 showed enhanced pitch memory and
labelling in the autism group. In experiment 2, when subjects were pre-exposed
to labelled individual tones, superior chord segmentation was also found.
However, in experiment 3, when disembedding performance was less reliant on
pitch memory, no group differences emerged and the children with autism, like
controls, perceived musical chords holistically. CONCLUSION: These findings
indicate that pitch memory and labelling is superior in autism and can
facilitate performance on musical disembedding tasks. However, when task
performance does not rely on long-term pitch memory, autistic children, like
controls, succumb to the Gestalt qualities of chords.
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