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Gepubliceerd in: Journal of Autism and Developmental Disorders 1/2008

01-01-2008 | Original Paper

How do Individuals with Autism Plan Their Movements?

Auteurs: Cheryl M. Glazebrook, Digby Elliott, Peter Szatmari

Gepubliceerd in: Journal of Autism and Developmental Disorders | Uitgave 1/2008

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Abstract

Two experiments investigated how persons with and without autism plan manual aiming movements when advance information is direct and when strategic planning is required. In Experiment 1 advance information about hand, direction, and/or movement amplitude was manipulated. Reaction times suggested both groups adopted a hierarchical pattern of movement planning. In Experiment 2, participants performed aiming movements to one of two targets that were the same or different size. Participants without autism varied the starting location in anticipation of specific target stimuli whereas participants with autism consistently selected the midpoint. Overall, individuals with autism used advance information to plan their movements when this information was direct. However, their performance became stereotyped when strategies were self-generated.
Voetnoten
1
Fitts law states that the time to execute an aiming movement is a function of the target amplitude and target width. Specifically MT = a + b log2ID where index of difficulty (ID) = 2 × target amplitude/target width.
 
2
Participants returned on another day to complete a similar experiment where the start location was predetermined. This protocol allowed detailed kinematic analysis of the movements. A paper reporting the results of this study is published in Motor Control (Glazebrook et al., 2006).
 
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Metagegevens
Titel
How do Individuals with Autism Plan Their Movements?
Auteurs
Cheryl M. Glazebrook
Digby Elliott
Peter Szatmari
Publicatiedatum
01-01-2008
Uitgeverij
Springer US
Gepubliceerd in
Journal of Autism and Developmental Disorders / Uitgave 1/2008
Print ISSN: 0162-3257
Elektronisch ISSN: 1573-3432
DOI
https://doi.org/10.1007/s10803-007-0369-1