Temporal stability of the Wisconsin Card Sorting Test in an untreated patient sample

This study evaluates the temporal stability of the Wisconsin Card Sorting T est (WCST). The only previous similar study found unacceptably low test-ret est stability in a non-patient elderly sample. In contrast, the present stu dy utilizes 29 untreated obstructive sleep apnea patients who are more typi cal of persons Likely to receive the WCST clinically. The 11 WCST scores ex amined demonstrated test-retest correlations from .34 to .83 (mean = .64). Six of 11 correlations were within .10 of the .80 criterion for clinical ut ility and there was minimal change across sessions. The current findings ju stify greater optimism regarding the test-retest reliability of the WCST.