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The More He Looked Inside, the More Piglet Wasn't There: Is Autism Really Blessed with Visual Hyperacuity?

      Ashwin et al. (
      • Ashwin E.
      • Ashwin C.
      • Rhydderch D.
      • Howells J.
      • Baron-Cohen S.
      Eagle-eyed visual acuity: An experimental investigation of enhanced perception in autism.
      ) claim that individuals with autism have significantly better visual acuity when compared with control subjects—acuity so superior that it lies in the region reported for birds of prey. The researchers suggested that their findings of significantly enhanced visual acuity in autism might be due to atypically high numbers of foveal cone cells.
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      Linked Article

      • Eagle-eyed Visual Acuity in Autism
        Biological PsychiatryVol. 66Issue 10
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          We thank Michael Bach and Steven Dakin and David Crewther and Alexandra Sutherland for their interesting commentaries with regard to the technical issues associated with use of the Freiberg Visual Acuity and Contrast Test (FrACT) (version 1.3) (1) in our study (2). We chose the FrACT for use in our study, because it is both quick and easy to implement and provides us with a quantitative measure of visual acuity (VA) that can be readily interpreted. As outlined in the commentaries, there are a number of settings within the FrACT that can be changed from their default values.
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      • Eagle-Eyed Visual Acuity: An Experimental Investigation of Enhanced Perception in Autism
        Biological PsychiatryVol. 65Issue 1
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          Anecdotal accounts of sensory hypersensitivity in individuals with autism spectrum conditions (ASC) have been noted since the first reports of the condition. Over time, empirical evidence has supported the notion that those with ASC have superior visual abilities compared with control subjects. However, it remains unclear whether these abilities are specifically the result of differences in sensory thresholds (low-level processing), rather than higher-level cognitive processes.
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