Correlations among the PPVT, CMMS, and RCPM were based on the performance of 38 cerebral palsied children whose mean age was 149.4 mo. The coefficients were all positive and significant ( p < .05). Considerable scatter in IQs was found among sets of data. The mean IQ on the PPVT was approximately 20 points higher than the mean IQs obtained from the CMMS and the RCPM, which were approximately equal. Comparison of scores for non-cerebral palsied children on these tests showed all three gave similar mean IQs. However, correlations among tests for non-cerebral palsied children differed from those for cerebral palsied children.
Forms 1, 2, and 3 of the Quick Test and the WISC-R were administered to 62 subjects, ages ranged between 72 mo. and 195 mo., M 138 mo., 52 black and 10 white children. Correlations between all forms of the Quick Test, the three scales of the WISC-R and the subtests, were all positive and significant, rs ranged from a low of .394 to a high of .790. As the mean IQs for the WISC-R scales were only approximately 5 IQ points below the Quick Test means, they were not significantly different.
A functional analysis of the Slosson Intelligence Test (SIT) was performed using the schema designed by Sattler for analyzing the Stanford-Binet (S-B). The two instruments were then compared. Analysis indicated that, despite the high correlations reported between the two instruments, they evaluate the various mental functions in different proportions, except at the adult level. There were significant correlations among the rank order of the categories evaluated at various age levels of the SIT.
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