Eighty-three children and adolescents referred because of learning difficulties were tested using the Peabody Individual Achievement Test (PIAT) and one or more standard measures of intelligence as part of a larger array of evaluations. Moderate positive correlations were found between the PIAT and the three measures of intelligence employed. These correlations increased significantly when statistical adjustments were made for age differences. Reliability coefficients and standard errors of measurement were calculated for all PIAT subtests. Clinical aspects of the PIAT are discussed.
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