1. Diagnostic and statistical manual of mental disorders;American Psychiatric Association,1980
2. Detroit test of learning aptitude;Baker,1959
3. Pathophysiologic findings in non-retarded autism and receptive developmental language disorder;Courchesne;Journal of Autism and Developmental Disorders,1989
4. Event-related potentials;Courchesne,1987
5. Peabody picture vocabulary test-revised;Dunn,1981