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Autism
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Brief report: Inhibition of return in young people with autism and Asperger's disorder

Nicole J. Rinehart

Monash University, Victoria, Australia, nicole.rinehart{at}med.monash.edu.au

John L. Bradshaw

Monash University, Victoria, Australia

Simon A. Moss

Monash University, Victoria, Australia

Avril V. Brereton

Monash University, Victoria, Australia

Bruce J. Tonge

Monash University, Victoria, Australia

The aim of this study was to investigate whether the superior search abilities observed in autism/Asperger's disorder may in part be a consequence of a more pronounced inhibition of return (IOR). Contrary to our prediction, IOR in individuals with autism was comparable to the matched comparison group. However, the autism group committed more false alarm responses than the matched comparison group; this may reflect a possible inhibitory deficit, or suggest that individuals with autism rely more on probabilities to determine their behavioural responses. There was a borderline-significant trend (p = 0.052) to indicate that IOR may be more pronounced in individuals with Asperger's disorder. In contrast to the autism group, the Asperger's disorder group had a pattern of false alarm responses similar to that of the comparison group. The findings further inform Minshew's complex information processing theory which seeks to establish which areas of neuropsychological functioning are preserved and deficit in autism.

Key Words: Asperger's disorder • autism • inhibition of return • visual search

Autism, Vol. 12, No. 3, 249-260 (2008)
DOI: 10.1177/1362361307088754
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