This study demonstrated the use of meta-analysis within a study to assess validity with samples of psychiatric aides from three state hospitals where the usual method of pooling samples was inappropriate. The mean weighted correlation between the modified Personnel Tests for Industry—Verbal Test and total scores on the work performance rating scale across samples (N = 173) was .23 (cumulative p = .001), which increased to .47 when corrected for restriction in range and error of criterion measurement. Although the number of samples was small for typical meta-analysis, the obtained validity was consistent with results from large meta-analyses with both similar and varied occupational groups.
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