“…These scales were designed to quantify the two systems of the original RST, and thus, do not separate the BIS and FFFS, though attempts have been made to distinguish the systems from items in the BIS/BAS scale (Heym et al, 2008), which may prove useful in uniting findings from studies that examined original RST with the theoretical changes seen in revised RST. Nevertheless, these original scales are still being widely used since the revisions to RST to classify approach/avoidance tendencies (e.g., Balconi et al, 2019; Bossola et al, 2020; Sun et al, 2020). More recent scales have been designed based on the revised RST, such as the Reinforcement Sensitivity Theory Personality Questionnaire (RST-PQ; Corr & Cooper, 2016), Reinforcement Sensitivity Questionnaire (RSQ; Smederevac et al, 2014), Revised Reinforcement Sensitivity Questionnaire (rRST-Q; Reuter et al, 2015), and the Jackson 5 (Jackson, 2009).…”