“…While psychophysiolocal indices (e.g., heart rate, salivation, skin conductance) have been proposed as scientific measurements of craving, participants' subjective self-report that a craving is present/absence may affect findings (Cooney, Baker, Pomerleau, & Josephy, 1984;Kozlowski & Wilkinson, 1987;Laberg & Ellertsen, 1987;Nirenberg & Miller, 1982;Wooley & Wooley, 1973 Ballard (1996aBallard ( , 1996b identifies personality as the most significant individual difference in human factors research. Studies have reported that individual differences in human factors experiments can be explained by personality traits such as field dependence (Moore & Gross, 1973),…”