This study examined the individual difference correlates of the validity scale from the Hogan Personality Inventory (HPI) which measures the extent to which a respondent has reported in a careless, erratic or random way. The aim was to determine the typical response profile of a careless and erratic respondent. Over 10,000 adults completed three measures: one of normal “bright-side” personality (HPI), one of “dark-side” personality (Hogan Development Survey, HDS) and one of motivation (Motives, Values, Preferences Inventory, MVPI). Scores on these measures were related to the validity scale scores using correlations and regressions. Bright and dark side measures were more strongly and logically related to validity scores than motives and values. Implications and limitations are discussed.