Happiness often feels like something we are always chasing. A new purchase, a big achievement, or even an unexpected setback can shift our mood in profound ways, yet those feelings rarely last forever. Psychologists call this pattern the hedonic treadmill, which describes the way people adapt to both highs and lows and eventually return to their usual level of happiness.
What Is the Hedonic Treadmill?
The term describes how humans tend to return to a relatively stable baseline of happiness, no matter what major life events occur. Imagine walking, or even running, on a treadmill. You may move faster or slower for a while, but you stay in the same place. In emotional terms, both extreme highs and extreme lows often give way to an eventual return to a usual mood range.
Hedonic adaptation is the process behind this pattern. When something positive happens, such as winning the lottery, getting married, or landing your dream job, our happiness spikes. As the novelty wears off, we adapt, and our emotional state drifts back toward baseline. The same thing happens in the opposite direction when life takes a hard turn.
The Classic Lottery Winners Study
One of the most cited examples of this comes from a 1978 study by psychologists Philip Brickman and Donald Campbell. They compared happiness levels in three groups: recent lottery winners, people who had experienced a disabling accident, and a control group with neither event. Surprisingly, they found that lottery winners were not significantly happier than the control group after the initial excitement faded. Likewise, those who had experienced a life-altering accident reported higher levels of happiness than expected after some time had passed (Brickman et al., 1978). The key takeaway is that our emotional systems are resilient and adaptable.
Adapting to Disability: Silver’s 1982 Study
A similar insight came from psychologist Ralph Silver’s 1982 research on individuals with severe spinal cord injuries. Within roughly eight weeks of their injuries, participants reported experiencing more positive emotions than negative ones. This does not mean the challenges disappeared, but it does suggest that even after profound loss, people often find ways to adjust and regain life satisfaction (Silver, 1982).
Why This Matters
The hedonic treadmill can be both comforting and frustrating. On one hand, it explains why adversity does not necessarily doom us to permanent unhappiness. We are wired to adapt. On the other hand, it shows why “more” is never enough when chasing material possessions or status. The boost these things bring often fades.
Knowing this gives us an advantage. If we understand that adaptation is inevitable, we can focus on habits and experiences that bring lasting meaning rather than short-lived thrills. Research suggests practices such as gratitude, nurturing relationships, and engaging in purposeful work can help slow hedonic adaptation and sustain higher levels of well-being.
References
Brickman, P., Coates, D., & Janoff-Bulman, R. (1978). Lottery winners and accident victims: Is happiness relative? Journal of Personality and Social Psychology, 36(8), 917–927. https://doi.org/10.1037/0022-3514.36.8.917
Silver, R. L. (1982). Coping with an undesirable life event: A study of early reactions to physical disability. Unpublished doctoral dissertation, Northwestern University.