The Psychoeducational Profile (PEP) offers a developmental approach to the assessment of autistic and psychotic children as well as children with related learning disabilities. Scores obtained are used in the planning of individualized special educational programs for these children. Most appropriately used with children functioning at a preschool age level within the chronological age range of 1 to 12 years, the PEP provides information on developmental functioning in the areas of imitation, perception, motor, eye-hand integration, cognitive performance, and cognitive verbal skills. As a diagnostic tool, the PEP identifies the degrees of behavioral pathology or psychosis in the areas of affect, relating, cooperating and human interest, play, and interest in materials, sensory modes, and language. The PEP consists of a set of toys and play activities presented to a child by an examiner who also observes, evaluates, and records the child's responses. The child's scores are distributed among seven function scales, thus yielding a profile depicting relative strengths and weaknesses in different areas of development and behavioral pathology. This publication provides information on the function areas, general testing considerations, administration, scoring, the manual, interpretation of scores and profiles, normal comparison sample, construction of the function score form, reliability, and validity. Appendices contain the test items, materials for the PEP, photographs of the materials, a function score form, and scoring keys. (RC)