Coherent versus Component Motion Perception in Autism Spectrum Disorder
- 365 Downloads
Research on visual perception in Autism Spectrum Disorder (ASD) tries to reveal the underlying mechanisms of aberrant local and global processing. Global motion perception is one way to study this aspect of ASD. We used plaid motion stimuli, which can be perceived as a coherently moving pattern, requiring feature integration, or as two transparent gratings sliding over each other. If global motion detection is impaired in ASD, this would lead to a decrease of the total time that a coherent pattern is perceived. However, in contrast to other studies in the literature, our results gave no evidence of impaired global motion perception in people with ASD. A reconciliation of the different outcomes is proposed based on spatial frequency processing in ASD.
KeywordsAsperger Integration Synchronization Global Stimulus rivalry
The work described was supported by an Innovational Research Incentives grant (VIDI-scheme, 402-01-094) of the Netherlands Organization for Scientific Research (NWO) to Chantal Kemner. We would like to thank Maarten van der Smagt for his suggestions on the analysis and interpretation of the data.
- Boeschoten, M. A., Kenemans, J. L., van Engeland, H., & Kemner, C. (in press) Face processing in Pervasive developmental disorder (PDD): the roles of expertise and spatial frequency. J Neural Transm.Google Scholar
- Wickens, T. (2002). Elementary signal detection theory. New York: Oxford University Press.Google Scholar