Rd. Wetzel et S. Yutzy, EFFECT OF REDUCING CUTOFF SCORES ON KEANE POSTTRAUMATIC-STRESS-DISORDER SCALE, Psychological reports, 75(3), 1994, pp. 1296-1298
Application of cut-off scores of 30, 35, and 40 on Keane's 46- and 49-
item PK scales of the MMPI for a convenience sample of 1708 psychiatri
c patients shows a cut-off of 28 endorsed items of a 46-item scale inc
reases classification as test positives by less than 3%.