Homeostatically Protected Mood (HPMood)

HPMood is a stable, low-intensity, object-free, neuro-physiologically generated positive mood state that serves as the foundational component of subjective wellbeing. Developed by Cummins, it represents a genetically determined set-point, analogous to the biological systems that regulate temperature or pH.

Set-point theory

Longitudinal studies (Cummins et al., 2014; Capic et al., 2018) provide empirical evidence for subjective wellbeing set-points. Set-points are normally distributed between roughly 71 and 90 points on a 0–100 scale, with individuals typically experiencing a normal range of 16–20 points of variance around their personal set-point.

External buffers — the “Golden Triangle”

Three primary external resources protect wellbeing:

• Money — particularly protective for lower-income individuals, with diminishing returns above roughly $91,000–$120,000 annually in Australian contexts.
• Personal Relationships — “the mutual contribution of intimacies and support,” showing strong associations with wellbeing.
• Achieving in Life — “the process of active engagement, providing purpose in life.”

Internal buffers

Cognitive buffers include self-esteem (measured via the Rosenberg Self-Esteem Scale), optimism (assessed through the Life Orientation Test-R) and perceived control. Adaptive mechanisms include habituation and adaptation, whereby individuals become desensitised to repeated or permanent stimuli.

Homeostatic breakdown

When chronic stressors overwhelm the protective system, individuals may experience homeostatic failure — indicated by wellbeing scores below 50 points, often correlating with clinical depression.