Hedonic adaptation
Hedonic adaptation is the drift back toward your ordinary level of happiness after your circumstances change, for better or for worse.
Somewhere in your flat is an object that was, briefly, the best thing you owned. You can probably name it. What you cannot do is recover the feeling, and you almost certainly stopped noticing the object within a month of getting it.
That drift is hedonic adaptation. It runs in both directions — the pay rise stops feeling like a pay rise, and so does the commute you dreaded when you first moved.
The strong version turned out to be wrong
The idea entered psychology through a 1978 study by Brickman, Coates and Janoff-Bulman, which compared lottery winners with people paralysed in accidents and reported that both groups' happiness sat far closer to ordinary than the events would predict. That became the hedonic treadmill — run as hard as you like, you end up back at a fixed set point.
Nearly thirty years later, Diener, Lucas and Scollon went back over the accumulated evidence in Beyond the Hedonic Treadmill, and most of that paper is corrections. Set points are not the same for everyone. They are not fixed — some people's baselines move over the course of years. Adaptation is frequently incomplete, and long-term unemployment and severe disability are the standard examples of averages that never return to where they began. And people adapt to different events at different rates, and differ from one another in how much they adapt at all.
So the accurate statement is weaker than the slogan and more useful. Circumstances count for less over time than they do at the moment they change, and how much less depends on the event and on the person. That is a claim about averages, not about you.
Why this is the mechanism a journal is aimed at
Adaptation explains one specific failure mode: good things that are still true stop being felt. Nothing has gone wrong. The flat is still the good flat. It has simply stopped arriving as information, and become the floor instead of the news.
Noticing is the only lever anyone has here. You cannot un-adapt on purpose, and an entry does not restore the first-week feeling. What an entry does is make the thing an object of attention for the thirty seconds it takes to write, and leave it retrievable later, which it otherwise would not be. That is also the reason three good things asks for specifics — a named detail is a thing you had to look at, and a slogan is not.
What is not established
That writing things down slows adaptation is plausible and thinly evidenced. No study shows that three lines at night keep a good circumstance feeling good, and it would be a hard thing to show. The claim worth making is the modest one — adaptation operates through inattention, and a journal is a cheap way of directing attention at the part of your life that has gone quiet.
Where it sits among the other terms
Three different things decay across this glossary, and hedonic adaptation is the one people most often merge with the other two. Negativity bias is about weighting at the moment of impact, where bad lands harder than good of the same size. The fading affect bias is about a single memory, and how the feeling attached to it drains — faster, usually, for the unpleasant ones. Adaptation is about neither the moment nor the memory, but the baseline you come back to after your circumstances have genuinely changed.
A journal has some purchase on the memory, a little on the noticing, and none at all on the weighting.
Research
- Lottery winners and accident victims: is happiness relative?Brickman, P., Coates, D., & Janoff-Bulman, R. (1978)
- Beyond the hedonic treadmill: revising the adaptation theory of well-beingDiener, E., Lucas, R. E., & Scollon, C. N. (2006)
Common questions
- What is hedonic adaptation?
- It is the tendency for a change in circumstances to stop registering once it becomes the new normal. A better flat, a pay rise, a new phone all feel like something for a while and then feel like the floor. The same happens to unwelcome changes, which is the more consoling half of the finding. Adaptation is about the baseline you settle back toward, not about any single memory or moment.
- Is the hedonic treadmill real?
- The phrase overstates a real effect. The strong version — a fixed set point that everyone returns to no matter what happens — was substantially revised by Diener, Lucas and Scollon in 2006. Their review found that baselines differ between people, that some people's baselines shift over years, and that adaptation to some events is never complete. What survives is the weaker claim that circumstances count for less over time than they do at the moment they change.
- How is hedonic adaptation different from the fading affect bias?
- They describe different things decaying. The fading affect bias is about one memory, and the feeling that was attached to it draining away as the years pass. Hedonic adaptation is about a durable change in your situation ceasing to affect how you feel day to day, even though the situation itself has not reversed. You can adapt to a good flat you still live in, which is not a memory effect at all.
- Can gratitude journaling stop hedonic adaptation?
- There is no good evidence that it stops adaptation, and pages that say otherwise are overselling. The defensible version is narrower. Adaptation works by things ceasing to be noticed, and writing something down is a way of noticing it for as long as it takes to write. Whether that measurably slows the fade of a real change in circumstances has not been established, so it is best treated as a plausible mechanism rather than a result.
- Do people adapt to bad events too?
- Often, but unevenly, and this is where the averages hide the most. Diener and colleagues found that adaptation to some negative events — long-term unemployment and severe disability among them — tends to be incomplete, with group averages settling below where they started. Individuals also vary widely around whatever the average is. Adaptation is a description of a population trend, not a promise about any particular person or any particular loss.