To determine the test-retest reliability of the Barron Ego Strength Scale (Es) administered out of the context of the MMPI, two groups of college males were given the test twice over a 2-mo. interval. Test-retest correlations of .75 and .81 are equivalent to those reported for the Es scale administered in the context of the MMPI, supporting the use of the 68-item scale as an independent measure.
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