Shortcomings in A. M. Leslie's nondevelopmental, nonsocial, and restrictively cognitive account of young children's "theory of mind" and capacity to pretend are noted, and the alternative thesis that a young child's metarepresentational capacity arises from, rather than forms the basis of, an understanding that humans have mental states…

Three possibilities for the pathogenesis of childhood autism are considered. Little evidence exists for autism as a basic affective disorder, as proposed by R. P. Hobson, but growing evidence supports childhood autism as a basic cognitive disorder, as the author argues. The author's original theoretical perspectives are revised. (SLD)