4.5 Article

Differences in the production and perception of communicative kinematics in autism

期刊

AUTISM RESEARCH
卷 14, 期 12, 页码 2640-2653

出版社

WILEY
DOI: 10.1002/aur.2611

关键词

autism; gesture; kinematics; motion tracking; movement

资金

  1. NWO Language in Interaction Gravitation Grant [024.001.006]

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The study found differences in communicatively relevant kinematic features of gestures between autistic and neurotypical individuals, as well as variations in how autistic individuals process repetition and complexity in gesture recognition compared to neurotypicals. These findings highlight how subtle aspects of behavior may be experienced differently by individuals with autism spectrum disorder and demonstrate the interaction between movement kinematics and social behavior in high-functioning autistic individuals.
In human communication, social intentions and meaning are often revealed in the way we move. In this study, we investigate the flexibility of human communication in terms of kinematic modulation in a clinical population, namely, autistic individuals. The aim of this study was twofold: to assess (a) whether communicatively relevant kinematic features of gestures differ between autistic and neurotypical individuals, and (b) if autistic individuals use communicative kinematic modulation to support gesture recognition. We tested autistic and neurotypical individuals on a silent gesture production task and a gesture comprehension task. We measured movement during the gesture production task using a Kinect motion tracking device in order to determine if autistic individuals differed from neurotypical individuals in their gesture kinematics. For the gesture comprehension task, we assessed whether autistic individuals used communicatively relevant kinematic cues to support recognition. This was done by using stick-light figures as stimuli and testing for a correlation between the kinematics of these videos and recognition performance. We found that (a) silent gestures produced by autistic and neurotypical individuals differ in communicatively relevant kinematic features, such as the number of meaningful holds between movements, and (b) while autistic individuals are overall unimpaired at recognizing gestures, they processed repetition and complexity, measured as the amount of submovements perceived, differently than neurotypicals do. These findings highlight how subtle aspects of neurotypical behavior can be experienced differently by autistic individuals. They further demonstrate the relationship between movement kinematics and social interaction in high-functioning autistic individuals.

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