Confirmation of Subjective Wellbeing Set-Points: Foundational for Subjective Social Indicators

The usefulness of subjective wellbeing (SWB) as a social indicator rests on understanding what controls its level when measured through self-report data. While the theory of SWB homeostasis provides a cogent explanatory framework for the control processes, this theory relies on set-points, and direct evidence for their existence rests on a single study. Cummins et al. (J Happiness Stud 15:183-206, 2014. doi:10.1007/s10902-013-9444-9) demonstrated a normal range of set-points between 71 and 90 points on a 0-100 scale, using data on global life satisfaction (GLS). These findings are consistent with homeostasis theory, which proposes that set-points account for the normal positivity of SWB while its stability is accounted for by homeostatic processes. The current paper extends the first report in two ways. First, by replicating the range of set-points using a different data set. Second, by extending the findings to homeostatically protected mood (HPMood), which is proposed to be the basic psychological molecule that homeostasis seeks to protect. Participants completed between 5 and 10 surveys. Data preparation involved the iterative elimination of scores based on significant deviation from their over-time mean score. It is confirmed that GLS and HPMood set-points are both normally distributed between 75 and 90 points. These results offer further support for the usefulness of SWB as a social indicator.