A five to fifteen year follow-up study of infantile psychosis. I. Description of sample.

Age Factors Autistic Disorder/diagnosis Behavior Birth Order Brain Damage, Chronic/diagnosis Child Child Behavior Child Behavior Disorders Child, Preschool Family Characteristics Female Follow-Up Studies Humans Infant Intelligence Interpersonal Relations Male Parents Psychological Tests Psychotic Disorders/diagnosis Schizophrenia, Childhood/diagnosis Sex Factors Sibling Relations Social Class Socioeconomic Factors