Subliminal Affirmations: Do They Actually Work?

Search YouTube or Spotify for “subliminal” and you’ll find millions of plays: subliminals for confidence, clear skin, wealth, even changing your eye color. The promise is that affirmations hidden under music or rain sounds will reprogram your subconscious mind without any effort from you.

It’s an appealing idea. But subliminal messages are one of the most thoroughly tested claims in psychology. Here’s what the research found.

What “subliminal” actually means

A subliminal message is one that’s below the threshold of conscious perception. You can’t consciously hear or see it, but the theory says your brain still processes it.

Most “subliminal affirmation” videos online use one of three methods:

1. Affirmations mixed very quietly under music or white noise.
2. Affirmations sped up, reversed or pitch-shifted.
3. Affirmations spoken at normal volume over music, which aren’t subliminal at all.

The famous popcorn study that never happened

Subliminal advertising became a public fear in 1957, when market researcher James Vicary claimed that flashing “Eat Popcorn” and “Drink Coca-Cola” during a film had boosted sales. It caused a sensation.

In 1962, Vicary admitted the study had been fabricated, or at least that he had too little data to support it. But the idea had already taken hold.

The self-help tape experiment

The most direct test of subliminal self-help came in 1991. Psychologist Anthony Greenwald and colleagues gave volunteers commercially sold subliminal tapes, designed to improve either memory or self-esteem, and had them listen daily for five weeks. Here’s the clever part: half the tapes were deliberately mislabeled, so some people with “memory” tapes actually had self-esteem tapes, and vice versa.

The results:

• Neither tape improved memory or self-esteem on objective tests.
• But many people believed they had improved, in line with the label on the tape, not its actual content.

In other words, the effect people felt came from expectation, not from the hidden messages. Researchers called it an illusory placebo effect. Similar studies found the same pattern.

Can subliminal messages do anything?

In carefully controlled lab conditions, very brief subliminal cues can nudge behavior slightly, but only in narrow situations. In a 2006 study, Johan Karremans and colleagues subliminally flashed a drink brand name. It made people more likely to choose that drink, but only if they were already thirsty.

That’s a far cry from reprogramming your self-esteem, wealth or appearance. Lab effects like this are small, short-lived and depend on a need you already have. Nobody has shown that a YouTube video can change your beliefs about yourself, let alone your body.

Why subliminals still feel like they work

If people feel better after listening, is that so bad? Not necessarily. Several real things are going on:

• Expectation. Believing something will help can genuinely shift your mood and motivation for a while.
• Relaxation. Calming music and rain sounds lower stress on their own.
• Ritual. Setting time aside for self-improvement can make you more aware of your goals.

The risk is cost and distraction: spending hours on hidden messages, or expecting a recording to do what only action can.

What works better than subliminal affirmations

If you like listening to affirmations, keep doing it, just make them audible and meaningful.

1. Listen to affirmations you can actually hear

Conscious affirmations let you engage with the words, and that engagement is where the benefits seem to come from. Research on self-affirmation suggests that reflecting on your values and strengths lowers stress and makes people more open to change. (See Do Affirmations Work?)

2. Make them believable

Affirmations that clash with what you believe can make you feel worse. Specific statements grounded in your real life work better: “I’ve learned hard things before, and I can learn this.”

3. Say them yourself

Speaking affirmations aloud, especially to yourself as “you,” engages you more actively. Our guide to mirror work explains how.

4. Use bedtime wisely

You can’t learn new beliefs in deep sleep, but the minutes before sleep are a calm time to reflect. Try reading a few affirmations as part of a wind-down routine: see Bedtime Affirmations.

5. Pair affirmations with one action

The fastest way to believe “I’m confident” is to do one slightly brave thing. Combine your affirmation with a small step each day.

The bottom line

Subliminal affirmations are mostly harmless, and the music can be relaxing. But the research is clear: hidden messages don’t reprogram your mind. The words you consciously hear, believe and act on are the ones that can change how you see yourself.

How Ananda can help

Ananda writes seven affirmations from your own story and reads them aloud in a calm voice, so you can listen in the morning, on a walk or before bed. Because they’re built on your real accomplishments, they’re the kind of affirmations your mind can actually accept, in any of 70 languages.

Sources

• Greenwald, A. G., Spangenberg, E. R., Pratkanis, A. R., & Eskenazi, J. (1991). Double-blind tests of subliminal self-help audiotapes. Psychological Science, 2(2), 119–122.
• Pratkanis, A. R. (1992). The cargo-cult science of subliminal persuasion. Skeptical Inquirer, 16(3).
• Karremans, J. C., Stroebe, W., & Claus, J. (2006). Beyond Vicary’s fantasies: The impact of subliminal priming and brand choice. Journal of Experimental Social Psychology, 42(6), 792–798.
• Cohen, G. L., & Sherman, D. K. (2014). The psychology of change: Self-affirmation and social psychological intervention. Annual Review of Psychology, 65, 333–371.