A few years ago I did an EEG study of shifts of visual spatial
attention in autism. In the paradigm developed from that study, we
present red and green flashes in the left and right hemifields. At any
given time, one hemifield is attended and the other is ignored. A red
flash in the attended hemifield cues an overt behavioural response -- a
finger movement -- and also a covert shift of attention into the
opposite hemifield.
`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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