The Wechsler Intelligence Scale for Children-Third Edition (WISC-III) is an individually administered test of intelligence for assessing children aged 6 through 16 years, 11 months. The WISC-III consists of several subtests, each classified into a verbal or performance scale. The child's performance on these measures is summarized in three composite scores, Verbal, Performance, and Full Scale intelligence quotient (IQ). Use of the WISC-III requires an examiner trained in administration and interpretation of standardized clinical instruments. Major features of the previous versions have been retained in the third edition, with changes described in detail in the manual. The new manual also includes a full discussion of validity issues. For the majority of items, scoring is objective, and little interpretation is necessary. Computerized scoring is available. Norms for this edition are from a standardization sample representative of the United States population of children (2,200 cases from 31 states). A practical evaluation of the WISC-III indicates that complexity of use is a major drawback to this widely used test. (Contains 7 references.) (SLD)