"During the past 39 years of conducting psychophysiological veracity (PV) examinations, this author observed a phenomenon wherein the responsivity of the confi rmed deceptive and truthful examinees remained constant and often increased with each chart collected on the relevant questions if deceptive or the control questions if truthful. Th is author suspected that the reason for this occurrence was due to the truthful examinee’s habituation to the relevant questions and the deceptive examinee’s habituation to the control questions, as a result of their psychological set being focused on the tests questions having the greatest threat to their security."(...)