The article indicates the contradiction that has existed in the scoring and interpretation of test batteries. The multifactor tests of intelligence measure many different human attributes, yet the interpretation of the results of testing with these instruments is based, almost universally, on a single index. (Author)

Fifty-six school psychologists reviewed a hypothetical case study designed to investigate their interpretations of different norm-referenced test scores. Subjects were more likely to recommend special education programs for normal students when percentile scores were used. School psychologists need to become more familiar with the properties of…