Do Affirmations Work? An Honest Look at the Research

Affirmations can work, but the research splits in two. Reflecting on your core values, which psychologists call self-affirmation, has a large body of supporting studies (Cohen & Sherman, 2014). Repeating positive sentences about yourself has thinner evidence, and one well-known study found that it made people with low self-esteem feel worse (Wood, Perunovic & Lee, 2009). The difference mostly comes down to what you say and how far it sits from what you already believe about yourself.

If you have tried affirmations and felt nothing, or felt a little worse, that fits the research. This guide covers what the studies show and how to word affirmations so they have a fair chance of working for you.

What counts as an affirmation?

The word covers two different practices, and the research on each is different.

The first is the one most people picture: a short positive sentence about yourself, repeated, such as “I am confident” or “I am enough.” You might read it on a sticky note, say it in the car, or repeat it in your head before a difficult conversation.

The second is what psychologists call self-affirmation. In most studies it is a short writing exercise. You pick a value that matters to you, such as your family or a craft you care about, and spend a few minutes writing about why it matters. Nobody repeats anything or claims to be confident or lovable. The point is to remind yourself of the parts of your life that stay solid when one area feels shaky.

Most of the strong evidence is about the second practice. The first has less direct research behind it, and the best-known study on it is a caution. Repeated statements can still be useful, but they need more care than most online advice suggests.

Are affirmations scientifically proven?

Self-affirmation is well supported. Repeated positive self-statements have much less evidence behind them, and the results are mixed.

In a 2014 review in the Annual Review of Psychology, Geoffrey Cohen and David Sherman summarized the research on self-affirmation (Cohen & Sherman, 2014). Across many studies, affirming core values made people less defensive when they faced threatening information, and it could soften their stress responses.

In a 2016 brain imaging study, Christopher Cascio and colleagues scanned people while they reflected on their values (Cascio et al., 2016). Self-affirmation activated the ventromedial prefrontal cortex and the ventral striatum, regions linked to thinking about yourself and to reward. Brain activity alone doesn’t show that anyone’s life got better. It does suggest that reflecting on what you value registers in the brain as personal and rewarding.

Why don’t affirmations work for some people?

The main reason is the distance between the words and what you believe. In a 2009 study in Psychological Science, Joanne Wood, Elaine Perunovic and John Lee asked people to repeat the statement “I am a lovable person” (Wood, Perunovic & Lee, 2009). People with high self-esteem felt slightly better afterwards. People with low self-esteem felt worse, so the affirmation hurt the people most likely to reach for it.

The authors’ explanation is easy to recognize. When a statement is far from what you believe about yourself, your mind tends to argue with it. You say “I am a lovable person” and a second voice starts listing the reasons you’re not. Each repetition gives that voice another turn, and by the end the exercise has mostly reminded you of the gap.

That finding explains why the same sentence can feel lovely to one person and hollow to another, and it points to a fix: start with words you can believe.

A few other reasons affirmations fall flat come from how they are practiced. These are practical observations, and no single study backs them:

• The statement promises an outcome you don’t control, like “Money comes to me easily,” so every unpaid bill counts as evidence against it.
• There are so many affirmations that none of them gets enough attention to sink in.
• The words get rushed or mumbled on autopilot while your mind is somewhere else.
• The practice lasts a few days and stops before the words have a chance to feel familiar.
• The hope is that the words will change your circumstances. Realistically they can shift how you talk to yourself, which is slower and smaller, and still worth having.

When do affirmations tend to help?

Putting the research together with ordinary experience, affirmations seem to work best when:

• the words feel at least partly true to you today
• they connect to something you value, like being a steady friend or treating yourself fairly
• they describe how you want to think or act, which is something you can practice
• you say them slowly and pay attention to the meaning
• you keep going for weeks, long enough for the sentences to stop feeling strange

How should you word affirmations?

Start with a version you can believe today, and move to a stronger one when it starts to feel true. If “I am confident” makes you wince, you don’t have to force it. A gentler sentence with the same idea gives your inner critic less to argue with, which is the problem Wood and her colleagues found.

One way to do this is to write each affirmation at three strengths:

Strength	Example	When it fits
Gentle	I’m learning to trust myself	Kind words about yourself feel hard to believe
Steady	I trust myself to figure it out	You have some evidence on your side, even on bad days
Bold	I trust myself completely	The steady version already feels true and you want to stretch

The gentle version is about direction. It doesn’t claim you have arrived, so there is less to push back against. The steady version makes a claim you can usually back up with something that happened. The bold version is the kind you see on posters, and it suits people who are already most of the way there.

Here are a few more plain examples in the same spirit:

• “I’m learning to be kind to myself when I make mistakes.”
• “I can handle today one step at a time.”
• “I’m allowed to rest.”
• “I’ve done hard things before, and I can do this one.”
• “My worth doesn’t depend on how much I got done today.”

You’ll find more in the self-worth and confidence collections, and across the full affirmations library.

A quick test for any affirmation

Say it out loud once and listen to what your mind does next. If the reply is a calm “yes, mostly,” keep it. If it’s a sharp “yeah, right,” soften the wording. Adding “I’m learning to,” “I can” or “I’m allowed to” at the start often does the job. If your mind stays silent, that’s usually fine too, because a sentence that has become familiar often feels like nothing much.

Does saying “you” instead of “I” help?

It can. In a 2014 study, Ethan Kross and colleagues found that people who talked to themselves in the second or third person, using “you” or their own name, handled stress better than people who used “I” (Kross et al., 2014). “You can do this” can land differently from “I can do this,” so it’s worth trying both. If you tend to spiral into worry, the affirmations for overthinking are a good place to experiment.

What can’t affirmations do?

Affirmations are a way of practicing how you talk to yourself. They won’t change your bank balance, and they aren’t a substitute for treatment if you’re dealing with depression or anxiety. If low mood or worry is getting in the way of daily life, a therapist or doctor is the right next step, and affirmations can sit alongside that help.

It also helps to drop the expectation of a big shift. The realistic result is smaller. A sentence you once found ridiculous starts to sound reasonable, and on a bad day you have something kinder ready to say to yourself.

How can you test whether affirmations work for you?

Keep the test small and give it time:

1. Pick three affirmations at the gentle or steady level, from one or two areas that matter to you right now.
2. Say each one out loud five to ten times, once a day, at the same point in your routine.
3. Keep going for at least a few weeks before you decide anything.
4. Change the wording whenever a line starts an argument in your head.

For more on dose and timing, see how many times to repeat affirmations. For why your voice matters, see the guide on saying affirmations out loud. If you’d like help keeping count, the free affirmation counter listens in your browser and counts your spoken repetitions for you.

Where does Mantrify fit?

Mantrify, an iPhone app for saying affirmations out loud, is built around this approach and is coming soon to iPhone (iOS 18+). Its library has about 190 affirmations in eight areas, and each one comes in gentle, steady and bold wording, so you can start with what you can believe and move up over time. You can also write your own. You say each affirmation out loud, on-device speech recognition counts each repetition, and a glass sphere fills as you get closer to your daily goal.