Abstract
The test-retest reliability of the profile yielded by the four subscores of the California Test of Mental Maturity was determined. Subjects were 716 pupils in Grades K, 1, and 2 who were tested twice within 8 mo. Canonical correlational analysis gave four statistically significant interprofile correlations, each based on a successively weaker canonical variate. These canonical correlations ranged from a high of .688 to a low of .167, raising some doubts regarding the stability of the test profile. The test-retest correlations between individual subscores ranged between .43 and .56, further attesting to the questionable reliability of these measures, at least for the lower levels of the test. Principal components analysis suggests the existence of a single general factor which, however, accounts for only a little more than half the total variance yielded by the battery.
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