A survey of school psychologists' practices for identifying mentally retarded students

Abstract

Surveys containing questions about identifying mentally retarded students were mailed to 500 randomly selected school psychologists, of whom 160 (32%) returned completed, usable forms. The Wechsler scales were the most frequently used tests for deriving IQ scores, which together with adaptive behavior scale scores were rated as most influential in identification-placement decisions. The Vineland Adaptive Behavior Scales were rated as the most used instruments for assessing adaptive delays. School psychologists were in less accord on issues such as the use of alternative norms for minority and lower SES students (35% confirmed their use), the application of an adaptive behavior standard score of 70 (47.7% indicated such use), and whether an established IQ score, such as 70, could be treated flexibly (27.2% stated they sometimes identified students with scores above the cut-off value). Suggestions are made for future research and current practice.