Abstract
Previous studies have indicated that scores on the Developmental Test of Visual Motor Integration correlate higher with Performance than Verbal and Full Scale IQs of the Wechsler Intelligence Scale for Children-Revised. WISC–III and Visual Motor Integration—3R scores from 99 boys and 46 girls ranging in age from 6 to 16 years were obtained by certified school psychologists to study the relationship between the two measures. Participants were drawn from six suburban Chicago school districts, two being very affluent. These Pearson correlations for standard scores ranging from .34 to .57 and following previous research, were ranked from highest to lowest and then transformed into an approximately normal Z statistic using Fisher Z. The highest correlation was compared to the next highest and so on, which yielded significant differences. Only four comparisons had to be made.
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