Use of the CBDI to detect malingering when malingerers do their "homework"

Previous research has demonstrated the ability of the Cognitive Behavioral Driver's Inventory (CBDI) to detect neuropsychological malingering [Arch. Clin. Neuropsychol. 12 (5) (1997) 491.], however, the present study tests if the CBDI can discern malingerers when they are "coached" on how brain-damaged patients actually perform on neuropsychological tests. Ninety-eight college student participants were given financial incentive to fake brain damage on the CBDI. Fifty-three of these subjects were "coached" and 45 were not. The coached and uncoached subjects performed indistinguishably on the CBDI. Both types of malingerers were discernable from real brain-damaged patients (99.2% accuracy area under the sensitivity-specificity curve). Further, CBDI profiles of five actual plaintiffs judged to be malingering were compared to CBDI profiles of experimental subjects. In each case, the malingering plaintiff's CBDI profile was indistinguishable from that of malingering experimental subjects and was clearly discernable from that of actual brain-damaged patients.