The psychometrically superior general procrastination measure, developed using IRT applied to a large item pool across multiple samples (total n>5,000) to select items that most efficiently measure the procrastination continuum. Alpha 0.89–0.91; strong convergent validity with Lay's (1986) GPS (r=0.87) and Tuckman's (1991) TPS (r=0.82). Unidimensional structure confirmed by CFA. Steel's (2007) temporal motivation theory meta-analysis (k=216, n=38,000) identified procrastination as arising from low self-efficacy, high task aversiveness, high impulsiveness, and low future orientation — PPS items were selected to capture this construct efficiently. The PPS does not support the popular typology of 'arousal,' 'avoidant,' and 'decisional' procrastinators: Steel's (2010) IRT analysis shows these are positions on a single continuum rather than empirically distinct types. In consumer contexts, higher PPS scores predict greater purchase delay for complex or high-involvement choices, lower savings behaviour, avoidance of product returns and complaints, and lower health screening compliance. The PPS is recommended when procrastination is the primary construct of interest and high measurement precision per item is needed.
Steel, P. (2010). Arousal, avoidant and decisional procrastinators: Do they exist? Personality and Individual Differences, 48(8), 926–934.
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