Evidence for Immediate Review #

Every substantive claim on the Immediate Review 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 · strong evidence — Feedback given while you work is among the strongest influences on learning, but its benefit is highly variable—well-aimed feedback helps substantially while vague, late or poorly directed feedback helps little or not at all.

Hattie & Timperley’s synthesis and Wisniewski, Zierer & Hattie’s 2020 meta-analysis of 435 studies both report feedback is on average one of the larger influences on achievement while stressing that its impact varies widely with type and conditions; the variability finding is well established.

Sources: Hattie & Timperley (2007), The power of feedback, Review of Educational Research — https://doi.org/10.3102/003465430298487 · Wisniewski, Zierer & Hattie (2020), The power of feedback revisited: A meta-analysis of educational feedback research, Frontiers in Psychology — https://doi.org/10.3389/fpsyg.2019.03087 · full reference ›

Supported · moderate evidence — Feedback is most useful when it arrives while the learner can still act on it—while the attempt and reasoning are still fresh—which is why building feedback into practice (e.g. checking against a worked solution right after attempting a problem) beats saving it all for the end.

Shute’s review of formative-feedback research concludes feedback should be timed so learners can use it; the general principle that actionable, well-timed feedback matters is well supported, even though the precise immediate-versus-delayed question is itself nuanced.

Sources: Shute (2008), Focus on formative feedback, Review of Educational Research — https://doi.org/10.3102/0034654307313795 · Hattie & Timperley (2007), The power of feedback, Review of Educational Research — https://doi.org/10.3102/003465430298487 · full reference ›

Supported · moderate evidence — Specific feedback that supplies a clear next step—and especially process-level feedback about the method used, such as ’try working backwards from the answer instead’—is more effective and more transferable than a bare verdict that something is wrong.

Hattie & Timperley distinguish task, process, self-regulation and self levels and argue task- and process-level feedback is most productive, with process-level feedback aiding transfer; the 2020 meta-analysis similarly finds high-information feedback (information for improvement) outperforms simple verification, consistent with this ordering.

Supported · strong evidence — Feedback aimed at the person (general praise such as ‘you’re a natural’) does little for learning and can be counterproductive because it diverts attention from the task; keeping feedback on the work and the method is what helps.

Kluger & DeNisi’s meta-analysis of 607 effect sizes found feedback cueing attention to the self (rather than the task) was among the least effective, and roughly a third of interventions reduced performance; Hattie & Timperley reach the same conclusion about self-level praise. The harm of person-focused versus task-focused feedback is one of the more robust findings in this area.

Sources: Kluger & DeNisi (1996), The effects of feedback interventions on performance: A historical review, a meta-analysis, and a preliminary feedback intervention theory, Psychological Bulletin — https://doi.org/10.1037/0033-2909.119.2.254 · Hattie & Timperley (2007), The power of feedback, Review of Educational Research — https://doi.org/10.3102/003465430298487 · full reference ›

Supported · moderate evidence — A bare score or verdict conveys little information for improvement; comments that say what to do next teach more than a grade alone.

Butler’s classic experiment found students given only comments improved subsequent performance and interest, whereas those given grades—or grades together with comments—did not; the result is well known and broadly replicated in spirit, though it is a single study line whose effect sizes vary by context.

Sources: Butler (1988), Enhancing and undermining intrinsic motivation: The effects of task-involving and ego-involving evaluation on interest and performance, British Journal of Educational Psychology — https://doi.org/10.1111/j.2044-8279.1988.tb00874.x · full reference ›

Supported · moderate evidence — Relying on frequent external (augmented) feedback can prop up performance during practice yet impair longer-term independent performance once the feedback is withdrawn; deliberately fading the feedback so the learner takes over monitoring builds more durable skill.

The motor-learning ‘guidance hypothesis’ (Salmoni, Schmidt & Walter) shows frequent knowledge-of-results can boost practice performance yet degrade retention when withdrawn, and Hattie & Timperley frame the aim of feedback as developing self-regulation; both converge on fading external feedback. The principle is well established though its magnitude varies by task.

Sources: Salmoni, Schmidt & Walter (1984), Knowledge of results and motor learning: A review and critical reappraisal, Psychological Bulletin — https://doi.org/10.1037/0033-2909.95.3.355 · Hattie & Timperley (2007), The power of feedback, Review of Educational Research — https://doi.org/10.3102/003465430298487 · full reference ›

Supported · moderate evidence — Practising deliberately without an aid you have been leaning on (an instructor’s prompt, a worked example, a navigation device) improves later unaided performance.

This follows directly from the guidance hypothesis and from work on reduced-frequency feedback schedules, which show that withdrawing or thinning augmented feedback during practice tends to improve retention and transfer relative to constant guidance; the effect is reliable in motor learning though it varies with task complexity and learner level.

Supported · moderate evidence — The ultimate aim of feedback is to be internalised, so the learner becomes their own source of it—catching and correcting errors as they go (self-regulation).

Hattie & Timperley identify self-regulation-level feedback—feedback that helps learners monitor and steer their own learning—as the most powerful kind and cast effective feedback as building toward learner self-monitoring; this is a central, widely adopted claim of the framework rather than a single experimental result.

Sources: Hattie & Timperley (2007), The power of feedback, Review of Educational Research — https://doi.org/10.3102/003465430298487 · full reference ›

Supported · moderate evidence — Feedback only improves learning if the learner actually uses it; feedback received and not acted upon does not close the gap between current and desired performance.

Wisniewski, Zierer & Hattie emphasise that feedback must be received and acted on to affect learning, and that high-information feedback enabling a next step drives the larger effects; the principle that feedback works through subsequent learner action is well supported, though effects depend on how it is used.

Sources: Wisniewski, Zierer & Hattie (2020), The power of feedback revisited: A meta-analysis of educational feedback research, Frontiers in Psychology — https://doi.org/10.3389/fpsyg.2019.03087 · Hattie & Timperley (2007), The power of feedback, Review of Educational Research — https://doi.org/10.3102/003465430298487 · full reference ›

Mixed · moderate evidence — Whether immediate feedback beats delayed feedback depends on the situation (task difficulty, learner level, and whether the goal is initial acquisition or longer-term retention and transfer), so timing should be chosen rather than assumed.

The immediate-versus-delayed feedback question is genuinely contested: Shute’s review and Kulik & Kulik’s earlier synthesis find immediate feedback often helps initial acquisition while delayed feedback can aid retention and transfer in some conditions, with outcomes depending on task and learner. The page’s emphasis on timely, in-the-moment feedback is sound for skill acquisition, but the broader optimum is situation-dependent.

Sources: Shute (2008), Focus on formative feedback, Review of Educational Research — https://doi.org/10.3102/0034654307313795 · Kulik & Kulik (1988), Timing of feedback and verbal learning, Review of Educational Research — https://doi.org/10.3102/00346543058001079 · full reference ›