Evidence for Mental Practice #

Every substantive claim on the Mental Practice page is checked against current research. Here is each claim, how well today’s evidence supports it, and the sources. The full, de-duplicated source list lives on the references page.

Supported · moderate evidence — Mental practice — rehearsing a skill in imagination without physical movement — reliably improves performance compared with no practice.

Meta-analysis of controlled studies found a significant positive mean effect of mental practice on performance versus no practice; the basic finding that motor imagery aids skill acquisition is well replicated across later motor-imagery reviews.

Sources: Driskell, J. E., Copper, C., & Moran, A. (1994), Does mental practice enhance performance? A meta-analysis, Journal of Applied Psychology 79(4), 481-492 — https://doi.org/10.1037/0021-9010.79.4.481 · Schuster, C., et al. (2011), Best practice for motor imagery: a systematic literature review, BMC Medicine 9, 75 · full reference ›

Supported · moderate evidence — Physical (real) practice produces better performance than mental practice on a repetition-for-repetition basis.

Standard finding in the motor-learning literature and in the meta-analysis: physical practice carries proprioceptive and outcome feedback that imagery only approximates, so an equal amount of physical practice generally outperforms mental practice alone.

Sources: Schmidt, R. A., & Lee, T. D. (2011), Motor Learning and Performance: From Principles to Application, 5th ed. — Human Kinetics · Driskell, J. E., Copper, C., & Moran, A. (1994), Does mental practice enhance performance? A meta-analysis, Journal of Applied Psychology 79(4), 481-492 · full reference ›

Supported · moderate evidence — Combining mental practice with physical practice produces better performance than the same amount of physical practice alone.

Combined mental-plus-physical practice schedules generally outperform physical-only schedules of equal physical volume; this additive benefit is consistent across the meta-analysis and subsequent motor-imagery practice reviews, and is the strongest practical case for mental rehearsal.

Sources: Driskell, J. E., Copper, C., & Moran, A. (1994), Does mental practice enhance performance? A meta-analysis, Journal of Applied Psychology 79(4), 481-492 · Schmidt, R. A., & Lee, T. D. (2011), Motor Learning and Performance, 5th ed. — Human Kinetics · full reference ›

Supported · moderate evidence — Mental practice helps more for cognitive (decision/sequence) tasks than for purely physical (strength/motor) tasks.

Task type was a significant moderator in the meta-analysis: effects were larger for tasks with a greater cognitive/symbolic component than for predominantly physical tasks, consistent with symbolic-learning accounts of why imagery rehearsal works.

Sources: Driskell, J. E., Copper, C., & Moran, A. (1994), Does mental practice enhance performance? A meta-analysis, Journal of Applied Psychology 79(4), 481-492 · full reference ›

Supported · moderate evidence — The performance benefit of mental practice fades over time, so it needs to be refreshed rather than done once.

The meta-analysis reported that the mental-practice effect attenuated as the retention interval lengthened, indicating the benefit is not durable from a single session and supports distributed/refreshed practice.

Sources: Driskell, J. E., Copper, C., & Moran, A. (1994), Does mental practice enhance performance? A meta-analysis, Journal of Applied Psychology 79(4), 481-492 · full reference ›

Supported · moderate evidence — The psychoneuromuscular theory — that imagining a movement works by firing the same muscle pathways as performing it — is not the accepted explanation; current accounts treat the effect as primarily central (brain-based) rather than muscular.

The low-level EFMG muscle activity invoked by the psychoneuromuscular hypothesis is too small and inconsistent to account for the learning gains; contemporary motor-learning and neuroscience accounts attribute imagery effects to shared central motor representations (functional-equivalence / motor-simulation views) rather than peripheral muscle innervation. The manual now flags this theory as superseded.

Sources: Schmidt, R. A., & Lee, T. D. (2011), Motor Learning and Performance, 5th ed. — Human Kinetics · Jeannerod, M. (2001), Neural simulation of action: a unifying mechanism for motor cognition, NeuroImage 14(1), S103-S109 · full reference ›

Supported · weak evidence — A minimum level of real skill or familiarity with the task is usually needed before mental practice is effective, because imagery must reference correct performance.

Consistent with the motor-learning view and motor-imagery practice guidelines that imagery rehearses an existing (correct) movement representation, so some baseline competence and accurate instruction improve its value; this is a widely stated principle but rests on weaker direct experimental evidence than the core mental-practice effect.

Sources: Schmidt, R. A., & Lee, T. D. (2011), Motor Learning and Performance, 5th ed. — Human Kinetics · Schuster, C., et al. (2011), Best practice for motor imagery: a systematic literature review, BMC Medicine 9, 75 · full reference ›