Development and Evaluation of Validity Scales for the Neuropsychology Behavior and Affect Profile: A Dissembling Study.

The Neuropsychology Behavior and Affect Profile (NBAP) is a peer-rated inventory of behavioral and affective changes in brain injured individuals and consists of five Clinical Scales that have demonstrated strong external validity. A potential confound is the NBAP's susceptibility to rater bias. In the present investigation, four validity scales were developed and external validity and psychometric properties were examined through a dissembling paradigm. Study I describes item selection and construction of the validity scales. Study 2 demonstrates that various combinations of both the clinical and validity scales effectively differentiated dissemblers from informants of two groups of traumatic brain injury patients. Although results differed somewhat when dissemblers were grouped according to their level of neuropsychological training, highly trained dissemblers (licensed clinical neuropsychologists) could be detected.