Do Affirmations Actually Work? What the Research Says

Affirmations have a reputation problem. On one side, social media promises they’ll rewire your brain and manifest your dream life by Friday. On the other, skeptics call them self-deception with nicer fonts. The truth, as usual, is more useful than either.

So, do affirmations work? The short answer: some kinds do, for some things, especially when they’re believable. And a few popular kinds can actually make you feel worse. Here’s what the research says, and how to use it.

What we mean by “affirmations”

Part of the confusion is that “affirmation” means two different things.

Self-affirmation, as psychologists study it, usually means reflecting on values that matter to you. In a typical experiment, people rank values like family, creativity or honesty, then write a few sentences about why their top value is important. That’s it. No mirror, no “I am a magnet for abundance.”

Positive affirmations, as most people use them, are short first-person statements you repeat: “I am enough,” “I deserve good things,” “I am calm.”

These overlap, but they’re not the same, and the evidence for each is different. Most of the strong findings come from the first kind. That matters, because it tells us what makes affirmations work, and that’s what you want to copy.

The evidence that self-affirmation helps

Self-affirmation theory goes back to psychologist Claude Steele in 1988. The idea is that we’re all motivated to see ourselves as good, capable and coherent. When something threatens that picture, like criticism or failure or bad news about our health, we get defensive. Reminding ourselves of what we value gives us a wider sense of who we are, so a single threat feels less total.

Decades of studies have tested this. A few highlights:

• It can buffer stress. In a 2005 study published in Psychological Science, David Creswell and colleagues had people affirm a personal value before a stressful public-speaking and mental-arithmetic task. Those who affirmed showed lower cortisol responses than those who didn’t.
• It makes people more open to hard messages. A 2015 meta-analysis by Tracy Epton and colleagues in Health Psychology pooled studies on self-affirmation and health. It found small but reliable effects on how people accepted health messages, their intentions to change and, to a degree, their actual behavior.
• It shows up in the brain. A 2016 fMRI study by Christopher Cascio and colleagues found that self-affirmation activated brain regions linked to self-related processing and reward, particularly the ventromedial prefrontal cortex and ventral striatum.
• It can have lasting effects in the right context. In a well-known 2006 study in Science, Geoffrey Cohen and colleagues found that a brief values-affirmation writing exercise improved grades for students facing negative stereotypes, with effects that persisted over the term.

For an accessible overview, Cohen and David Sherman’s 2014 review in the Annual Review of Psychology is a good starting point.

None of this is magic. The effects are usually modest. But they’re real, and they point to a clear mechanism: affirmations help when they connect you to something true and important about yourself.

When affirmations backfire

Now the part the influencers skip.

In 2009, Joanne Wood, Elaine Perunovic and John Lee published a study in Psychological Science with a pointed title: “Positive self-statements: Power for some, peril for others.” They asked participants to repeat “I’m a lovable person.” People with high self-esteem felt slightly better afterwards. People with low self-esteem felt worse, worse even than those who didn’t repeat anything.

Why? When a statement is far from what you believe, saying it can trigger an internal rebuttal: no, I’m not. Instead of building you up, the line shines a light on the distance between where you are and where it says you should be.

This is the most important thing to know about affirmations, and it explains why so many people try them and quit. The lines they were given were too big to believe.

So what actually makes an affirmation work?

Put the research together and a few principles stand out.

1. Believable beats impressive

An affirmation should feel true, or at least almost true. “I am learning to trust myself” works on days when “I trust myself completely” would feel like a lie. Permission-based lines like “I am allowed to rest” or “I do not have to believe everything I say about myself” are especially gentle, because they don’t ask you to claim anything, just to allow it.

2. Values beat vague praise

The strongest evidence is for affirmations rooted in what you care about. “I show up for the people I love” or “I care about doing honest work” connect you to something real. Generic praise like “I am amazing” doesn’t give your mind anything to hold.

3. Process beats perfection

Lines about growth, like “I can be a work in progress and still be at peace,” avoid the gap problem entirely. You don’t have to be finished. You just have to be in motion.

4. Saying beats skimming

There’s good reason to say affirmations out loud. The production effect, documented by Colin MacLeod and colleagues in 2010, shows that we remember words we say aloud better than words we read silently. Speaking also forces a moment of attention, and attention is the whole game. (See our step-by-step guide on how to say affirmations out loud.)

5. Distance can help

Research on self-talk by Ethan Kross and colleagues (2014) found that talking to yourself in the second or third person, using “you” or your own name instead of “I,” helped people regulate emotions under stress. If “I am okay” feels hollow, try “You’re okay, you’ve handled hard things before.”

6. Consistency beats intensity

Most changes to how we habitually talk to ourselves happen slowly, through repetition across days. Two minutes most days does more than a long session once a month.

What affirmations can’t do

Affirmations won’t manifest a promotion, cure depression, or replace the hard, practical work of changing your circumstances. They aren’t a treatment for mental illness. If you’re dealing with persistent low mood, anxiety or thoughts of harming yourself, please reach out to a doctor, a therapist or someone you trust.

What affirmations can do is change the soundtrack. Most of us carry a running commentary that’s harsher than anything we’d say to a friend. A daily practice of saying believable, kind, specific lines out loud is a way of slowly adding a second voice to that commentary, one that’s on your side.

A research-informed routine

Here’s how to put all of this into practice in about two minutes a day:

1. Pick three to five believable lines tied to what you value or what you need today.
2. Say each one out loud, slowly, once. Whisper if you need to.
3. Pause after each line and notice whether it felt true. Soften any line that felt like a lie.
4. Check in at the end: how do you feel now, compared to before?
5. Repeat daily, ideally at the same time, attached to something you already do.

This is exactly the loop Out Loud is designed around: a few believable lines, said in your own voice, confirmed one by one, with a quick check-in at the end. If you’d like ready-made lines, start with our self-love affirmations or affirmations for anxiety.

The verdict

Do affirmations work? The research says: yes, when they’re believable, connected to what you value, and practised consistently. The “I am a billionaire” kind can do more harm than good, especially when you’re already struggling. The “I am learning to be kinder to myself” kind, said out loud and meant a little more each day, is one of the simplest things you can do for the way you treat yourself.

Studies mentioned

• Steele, C. M. (1988). The psychology of self-affirmation. Advances in Experimental Social Psychology, 21.
• Creswell, J. D., et al. (2005). Affirmation of personal values buffers neuroendocrine and psychological stress responses. Psychological Science, 16(11).
• Cohen, G. L., et al. (2006). Reducing the racial achievement gap: A social-psychological intervention. Science, 313(5791).
• Wood, J. V., Perunovic, W. Q. E., & Lee, J. W. (2009). Positive self-statements: Power for some, peril for others. Psychological Science, 20(7).
• MacLeod, C. M., et al. (2010). The production effect: Delineation of a phenomenon. Journal of Experimental Psychology: Learning, Memory, and Cognition, 36(3).
• Cohen, G. L., & Sherman, D. K. (2014). The psychology of change: Self-affirmation and social psychological intervention. Annual Review of Psychology, 65.
• Kross, E., et al. (2014). Self-talk as a regulatory mechanism: How you do it matters. Journal of Personality and Social Psychology, 106(2).
• Epton, T., et al. (2015). The impact of self-affirmation on health-behavior change: A meta-analysis. Health Psychology, 34(3).
• Cascio, C. N., et al. (2016). Self-affirmation activates brain systems associated with self-related processing and reward and is reinforced by future orientation. Social Cognitive and Affective Neuroscience, 11(4).