Does mental rehearsal work? What forty years of research shows, and where it stops

The short version

Question	What the research says
Does it improve performance?	Yes, moderately. Classic meta-analyses report average effects of about d = 0.48 to 0.53
Is it as good as real practice?	Usually not. Physical practice generally does better; combining both does best
What kinds of tasks benefit most?	Tasks with more thinking, planning, and sequencing, rather than pure strength or speed
How long does the effect last?	It fades. In the largest early review, the benefit roughly halved by about two weeks
Does it work for everyone?	Most studies use people who can form images. Whether people with aphantasia benefit is unknown

The classic meta-analyses

Feltz and Landers, 1983. The first large review pooled 60 studies of mental practice and motor skill learning. Mental practice was better than no practice, with an average effect size of 0.48, and the effect was larger for tasks with more cognitive elements than for pure motor or strength tasks (Feltz and Landers, 1983).

Driskell, Copper, and Moran, 1994. This widely cited review in the Journal of Applied Psychology found that mental practice had “a positive and significant effect” on performance, moderated by the type of task, how long after practice performance was tested, and session length (Driskell and colleagues, 1994). Later reviewers report its average effect as about d = 0.53 and note that the benefit halved by about 14 days and was negligible by about 21 days without further rehearsal (Cole and colleagues, 2021).

An effect of about half a standard deviation means a typical person who rehearsed performed better than roughly two-thirds of comparable people who did not. That is meaningful, not miraculous.

Newer research in sport

Sport is where imagery has been studied most, and recent reviews broadly agree with the classics:

• A 2021 meta-analysis of imagery interventions in sport found an average effect of d = 0.43 on motor performance, with benefits for motivation and mood as well. Imagery combined with physical practice did better than physical practice alone (Simonsmeier and colleagues, 2021).
• A 2025 review of 86 studies with 3,593 athletes found a moderate effect (SMD 0.50), with the best results from about ten minutes, three times a week, over roughly three months (Liu and colleagues, 2025).
• Not every review is as positive. A 2020 analysis of 37 studies found a small effect (r = 0.13), a reminder that results depend on how imagery is taught and measured (Toth and colleagues, 2020).

What happens in the body and brain

Two small but famous experiments show why mental rehearsal is more than wishful thinking.

Piano practice in the head. In a 1995 study, people who mentally practiced a five-finger piano exercise showed changes in the motor areas of the brain similar to those of people who physically practiced. Their playing was not as good as the physical group’s, but a single physical session brought them close (Pascual-Leone and colleagues, 1995). A later study of expert pianists found the same pattern: mental practice helped, physical practice helped more (Bernardi and colleagues, 2013).

Strength from imagined contractions. Over 12 weeks, volunteers who imagined contracting a finger muscle for 15 minutes a day gained 35 percent in finger strength, compared with 53 percent for those who physically trained and no change in controls (Ranganathan and colleagues, 2004). The groups had only six to eight people each, so treat the exact numbers cautiously.

Beyond sport: surgery and everyday performance

In a small randomized study, novice surgeons who did 30 minutes of mental practice before each simulated operation received higher technical-skill ratings than controls (Arora and colleagues, 2011), and a companion study found they were less stressed (Arora and colleagues, 2011). But a meta-analysis of nine surgical trials found the pooled effect on overall performance fell just short of significance (Rao and colleagues, 2015). The consistent message: mental rehearsal is a useful supplement to hands-on training, not a replacement.

For everyday performances such as presentations, interviews, and hard conversations, there is less direct research. The principles from sport and skill learning are a reasonable guide, but we cannot point to trials showing a specific size of benefit for, say, a job interview.

What the research does not show

• That imagining success makes success happen. The studies rehearse the process of a task, not a picture of the outcome. Imagining the trophy is not the same as rehearsing the putt.
• That it replaces practice. Physical practice almost always wins head to head.
• That it works for everyone equally. People who report no visual imagery (aphantasia) may still have “felt” or movement imagery, but no trial has tested whether they benefit from mental rehearsal. Our guide to visualization without vivid pictures offers word-based alternatives.
• That more is always better. Rehearsal can tip into rumination when it becomes replaying what could go wrong. See when mental rehearsal becomes overthinking.

Five rules the research supports

1. Rehearse the process, not the result. Specific steps, at real speed, in the real setting.
2. Combine it with real practice. Use rehearsal to prepare for, or add to, the real thing.
3. Keep sessions short and regular. About ten minutes, a few times a week, is a well-supported dose.
4. Keep rehearsing until the event. Benefits fade within weeks, so rehearse in the days before, not only a month ahead.
5. Favor tasks with sequence and decisions. Planning-heavy tasks seem to benefit most.

Our fill-in mental rehearsal script puts these rules into a template, and our ten mental rehearsal examples show them applied from sport to everyday life.

Make a rehearsal you can replay

A recorded rehearsal makes the “short and regular” part easier, because the pacing and pauses are done for you. Manai can turn your scene into a narrated mental rehearsal: describe the setting, the steps, the feelings you expect, and one hiccup, and it writes and narrates the practice. You can create a mental rehearsal in Manai, check the script against reality, then replay it each day before the event. This is a way to make rehearsal convenient, not evidence that a Manai recording improves performance.

Original illustrative request, not a tested example:

Create a six-minute mental rehearsal of my first two minutes at the piano recital on Sunday. I walk on from the left, bow, sit, adjust the bench, and start the Chopin nocturne. Include my shaky hands as I sit and one slow breath before the first note. Rehearse the first eight bars at real tempo with a pause the length of the phrase. First person, present tense.

Frequently asked questions

Is mental rehearsal scientifically proven?

There is solid research that mental rehearsal improves performance, with moderate average effects in several meta-analyses since 1983. It is not proven to replace physical practice, and its effects depend on the task and fade without continued rehearsal.

How effective is mental rehearsal compared with physical practice?

Physical practice usually produces larger gains. Mental rehearsal adds to it: in sport research, imagery plus physical practice beat physical practice alone. When you cannot practice physically, rehearsal is much better than nothing.

How long does mental rehearsal take to work?

Effects can appear after a single session for short tasks, but most studies run for days or weeks. One recent review found the best results with about ten minutes, three times a week, over roughly three months.

Does mental rehearsal work if I cannot picture things?

It may, but this has not been tested. Many people with little visual imagery can still imagine movement, sound, or words. Try rehearsing the steps as a spoken sequence or as body sensations and see whether the real task feels more familiar.

Can mental rehearsal make anxiety worse?

It can if it turns into repeatedly imagining failure. Keep rehearsals short, rehearse your planned response to a problem rather than the problem itself, and stop if you notice yourself looping. If performance anxiety is severe, a psychologist can help.

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