I'm going to briefly show you the results of this original
experiment just to give you an idea of what has motivated the
adaptation of this work to fMRI. The behavioural data are no big
surprise: when people with autism have less than about two seconds to
reorient their attention, they start performing significantly worse
than normal.
`fMRI Evidence for Generalised Arousal as a Substitute for Early Selection in Autism during Conditions of Shifting Visual Spatial Attention', Matthew Belmonte, 10 November 2001
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