A wellbeing definition, in the research, is not "feeling good." It is a measure of how well someone's life is going for them — the balance of everything positive and negative in it, from health and income to relationships and a sense of purpose. That is the broad version. The narrow version covers only the positive side and stands opposite "ill-being," which covers the negative.
The qualification matters: no single model owns the word. Philosophers and psychologists have argued about what wellbeing essentially is for centuries, and the empirical research only picked up in the second half of the twentieth century. What follows are the three frameworks you will actually meet in studies, plus the practical five-part breakdown that turns them into something you can act on.
What does hedonic wellbeing actually measure?
Hedonic wellbeing measures the balance of pleasure over pain. That is the whole claim: a life goes well to the extent that good feelings outweigh bad ones. In its modern form this shows up as "subjective wellbeing" — how a person feels about and evaluates their own life, usually through life-satisfaction questions and mood reports. This connects to our earlier piece, Screen-time reports are measurement, not judgment — here's how to use one.
It is the easiest model to measure and the easiest to overrate. A pleasant week is not the same as a good life, and researchers know it. That gap is exactly why the second model exists.
What is eudaimonic wellbeing, and why does it matter?
Eudaimonic wellbeing asks a different question: not "do you feel good?" but "are you functioning well?" The word traces back to Aristotle, but the modern version is simpler. It covers whether you can respond to challenges, make meaning in your life, and function well in society — even as things change.
The What Works Centre for Wellbeing describes this as wellbeing as "flourishing": feeling positive emotions, functioning well, and making meaning. In positive psychology, the best-known version is Martin Seligman's PERMA model, which treats positive emotion, engagement, relationships, meaning, and accomplishment as separate ingredients rather than one feeling.
The two models are not rivals so much as two dials on the same dashboard. One tracks how life feels. The other tracks whether the machinery underneath is working.
Which model do researchers actually use?
In practice, most working frameworks blend the two, and philosophy gives them a tidy map. According to Wikipedia's overview of well-being, theories of wellbeing fall into three families: hedonism, which grounds wellbeing in the pleasure-over-pain balance; desire theories, which locate it in getting what you want; and objective list theories, which hold that a combination of diverse elements — health, relationships, achievement, meaning — is what makes a life go well.
Most applied research lands in the third camp. The What Works Centre's model treats wellbeing as dynamic: your external conditions (job, income, environment) interact with your internal resources (health, resilience) to produce both good feelings and good functioning. It changes as your life changes, which is why a single snapshot rarely tells the whole story.
What are the five domains of wellbeing?
For everyday use, the models compress into five types. As Psychology Today lays them out, the major types are emotional, physical, social, workplace, and societal wellbeing — the ability to manage stress, keep your body working, build real relationships, find meaning in your work, and take part in a thriving community.
The author's own framing is the useful part: a car with a great engine and broken brakes still doesn't drive. If everything else is going well but you are lonely or run down, the whole system underperforms. Each domain needs to work "to an extent" — not perfectly, just not broken.
What this means at your desk: a wellbeing check that only asks "how happy are you?" is reading one dial. A better check touches all five. Our sister guide on what a wellbeing check should actually ask follows that logic.
What actually improves wellbeing, per the evidence?
The NHS distills the research into five steps, and they map neatly onto the domains above. Per the NHS's guide to mental wellbeing, the steps are: connect with other people, be physically active, learn new skills, perform acts of kindness or giving, and pay attention to the present moment — mindfulness, in plain terms.
Notice what is missing: nothing on the list requires an app, a subscription, or a streak counter. The NHS notes that physical activity helps through raised self-esteem and mood-changing brain chemistry, that learning boosts confidence and purpose, and that giving creates feelings of reward and self-worth. Small, unglamorous, repeatable.
The What Works Centre adds the equity caveat that vendors rarely mention. Its analysis of what affects wellbeing lists physical and mental health, close relationships, job quality, income, daily activities, environment, and autonomy — and notes that the same factor matters less the more of it you already have. An extra £10 means far more to someone on minimum wage than to someone on £35k. Wellbeing support that ignores starting conditions is measuring the wrong thing.
Our analysis: why the definition matters more than the word
Here is the part worth keeping. The word itself is contested — we have covered the spelling debate in "Wellbeing or well-being?" — but the substance is not. Every serious model agrees on one thing: wellbeing is plural. It is feelings plus functioning plus conditions, and no single number captures it. Readers following this should also see Wellbeing or well-being? The spelling matters less than what the word actually covers.
That has a practical consequence for anyone selling you wellbeing. A tool that optimizes only your mood — another hit of pleasant content, another soothing notification — is working the hedonic dial while the brakes squeal. The research-backed definition is a filter: before trusting any wellbeing claim, ask which of the five domains it actually touches, and whether the evidence covers more than one.
What the sources here do not establish is a single best intervention for a specific person. The evidence supports the domains and the broad steps, not a personalized prescription — and if low wellbeing is persistent or severe, the right next step is a clinician, not an article.
For more in this thread, the full wellbeing section collects the research-backed guides, and our tools coverage applies the same evidence-first filter to the apps that promise all of this in one tab.
