A short version of the original TPQ was included as part of the Health and Lifestyle Questionnaire. Although the TPQ originally measured only three dimensions, subsequent revisions of the measure resulted in the addition of an extra dimension, Persistence. As such, we analysed five items that originally contributed to Reward Dependence as a separate Persistence scale. Additionally, after revision of the scale, one of the Reward Dependence items was assigned to Novelty Seeking. Our final personality measure included 18 Harm Avoidance, 19 Novelty Seeking, 12 Reward Dependence, and 5 Persistence items.
