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Why Practice Alone Can Make Skills Worse
Expert feedback is most valuable when bad habits would otherwise harden into normal technique.
On this page
- Why learners miss their own mistakes
- Immediate feedback and the edge of ability
- Examples from writing, sport, music, and work
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Introduction
Practising a skill is not the same as improving it. In high-stakes domains—surgery, aviation, emergency response, elite sport, music performance, leadership communication, or professional writing—the greatest danger is often not lack of effort but repeated mistakes becoming automatic. Deliberate practice feedback exists to prevent that outcome. It helps learners see the gap between what they think they are doing and what expert performance actually requires.
Research on deliberate practice consistently identifies feedback as a core ingredient of expert development. Improvement is fastest when practice targets specific weaknesses, performance is observed against a clear standard, and corrections arrive quickly enough to influence the next attempt. Without that feedback loop, people often reinforce existing habits rather than build better ones. [Frontiers]frontiersin.orgFrontiersDeliberate Practice and Proposed Limits on the Effects of…by KA Ericsson · 2019 · Cited by 520 — The original stimulus for th… [PubMed]pubmed.ncbi.nlm.nih.govPubMedDeliberate practice and acquisition of expert performanceby KA Ericsson · 2008 · Cited by 2875 — In this article, we draw upon the…
Why Practice Alone Can Make Skills Worse
Many skills contain errors that are difficult for performers to detect from the inside.
A tennis player may not notice a subtle flaw in footwork because attention is focused on the ball. A musician may hear the melody but miss timing inconsistencies. A manager delivering a presentation may feel confident while the audience experiences confusion. A writer may understand their own argument so well that structural gaps become invisible.
The problem is not intelligence. It is perspective. Human beings experience performance from the first-person view, while quality is usually judged from the outside. Once a flawed movement, phrasing pattern, communication habit, or decision process is repeated enough times, it becomes normal and increasingly difficult to change.
This is particularly dangerous in high-stakes environments because errors can remain hidden until consequences become serious. A pilot can perform hundreds of routine flights before an emergency exposes a weakness. A surgeon may develop inefficient technique that only becomes apparent during a difficult procedure. A senior professional may receive promotions despite communication habits that later limit leadership effectiveness.
Expert feedback interrupts this process before habits harden. It identifies deviations early, when correction is cheaper and easier. [PubMed]pubmed.ncbi.nlm.nih.govPubMedDeliberate practice and acquisition of expert performanceby KA Ericsson · 2008 · Cited by 2875 — In this article, we draw upon the… [PubMed]pubmed.ncbi.nlm.nih.govPubMedDeliberate practice and acquisition of expert performanceby KA Ericsson · 2008 · Cited by 2875 — In this article, we draw upon the…
Why Learners Miss Their Own Mistakes
The most valuable coaches, teachers, supervisors, and mentors do not merely supply encouragement. They supply information that learners cannot reliably generate themselves.
Several mechanisms make self-diagnosis difficult:
- Automaticity hides errors. As skills become familiar, performers stop consciously monitoring many actions.
- Outcome bias masks technique problems. If the result was acceptable, people assume the process was acceptable.
- Selective attention narrows awareness. Concentration on one aspect of performance often blinds people to others.
- Lack of expert standards. Novices frequently do not know what excellent performance looks like in sufficient detail.
This explains why experts often spot problems within seconds that learners have repeated for months. They possess richer mental models of successful performance and can compare behaviour against those models. Deliberate practice research emphasises that improvement depends not merely on repetition but on identifying specific errors and adjusting behaviour accordingly. [PMC]pmc.ncbi.nlm.nih.govPMCby B Wisniewski · 2020 · Cited by 1984 — Feedback is information provided by an agent regarding aspects of one's performance or unders… [Frontiers]frontiersin.orgFrontiersDeliberate Practice and Proposed Limits on the Effects of…by KA Ericsson · 2019 · Cited by 520 — The original stimulus for th…
Immediate Feedback and the Edge of Ability
The most effective feedback arrives close to performance and focuses attention on a manageable improvement target.
Deliberate practice differs from ordinary practice because it operates near the learner’s current limits. Tasks are difficult enough to expose weaknesses but not so difficult that performance collapses entirely. In that zone, feedback becomes highly informative. The learner discovers exactly where execution breaks down and what adjustment is required next. [Paulo Gentil]paulogentil.comPaulo GentilDeliberate Practice and Acquisition of Expert Performanceby KA Ericsson · Cited by 2875 — DP also involves the provision of i… [Wiley]onlinelibrary.wiley.comj.1553 2712.2008.00227.xWiley Online LibraryDeliberate Practice and Acquisition of Expert Performance…3 Nov 2008 — Significant improvements in performance wer…
A useful way to think about deliberate practice is as a cycle: [commoncog.com]commoncog.comthe problems with deliberate practiceCommoncogThe Problems with Deliberate Practice30 Jan 2019 — In its most general form, Ericsson notes that feedback need not be immediate…
- Attempt a specific task.
- Compare performance against a clear standard.
- Receive corrective feedback.
- Adjust technique.
- Repeat immediately.
Each loop narrows the gap between current and desired performance.
Short feedback loops are especially important in high-stakes skills because memory degrades quickly. The longer the delay between action and correction, the harder it becomes to identify the exact cause of the problem. Coaches reviewing video moments after a performance, music teachers correcting a passage during rehearsal, or editors commenting on a draft before the writer moves on are all shortening the learning cycle. [Commoncog]commoncog.comthe problems with deliberate practiceCommoncogThe Problems with Deliberate Practice30 Jan 2019 — In its most general form, Ericsson notes that feedback need not be immediate… [Datopian]datopian.comDeliberate PracticeDeliberate practice involves feedback and modification of efforts in response to that feedback. Early in the training…
What Effective Feedback Actually Looks Like
Many people imagine expert feedback as criticism. Research suggests the reality is more specific.
Influential feedback models describe effective feedback as answering three questions:
- Where am I trying to get to?
- How am I doing relative to that goal?
- What should I do next? [Sage Journals]journals.sagepub.comSage JournalsThe Power of Feedback - John Hattie, Helen Timperley, 2007by J Hattie · 2007 · Cited by 28896 — This article provides a conc…
The best feedback therefore focuses on the task rather than the person’s identity.
Less effective:
- “You’re not a strong presenter.”
More effective:
- “Your opening established the problem clearly, but the recommendation arrived six minutes later. Move it into the first minute.”
Less effective:
- “Your technique needs work.”
More effective:
- “Your elbow drops during acceleration, reducing control.”
Specificity matters because it produces an actionable next attempt. The learner leaves knowing what to practise, not merely how to feel.
Examples from Writing, Sport, Music, and Work
Writing
Writers often improve slowly when working alone because they already understand what they intended to say. Editors and experienced reviewers see what readers actually receive.
A skilled editor might identify recurring issues such as weak structure, unsupported claims, unclear transitions, or unnecessary complexity. The value is not proofreading. It is revealing the difference between intended communication and actual communication.
Repeated revision based on targeted editorial feedback teaches judgement that solitary writing rarely develops as quickly.
Sport
Elite sport provides some of the clearest examples of deliberate practice feedback. [commoncog.com]commoncog.comthe problems with deliberate practiceCommoncogThe Problems with Deliberate Practice30 Jan 2019 — In its most general form, Ericsson notes that feedback need not be immediate…
Modern athletes use coaches, video analysis, biomechanical measurements, and performance data to identify tiny technical flaws. A movement adjustment measured in centimetres or milliseconds can alter outcomes dramatically.
The key is not that athletes receive more motivation. They receive more accurate information about performance. Every training session becomes a diagnostic opportunity.
Music
Music researchers have found strong links between deliberate practice and achievement, particularly when practice targets specific technical weaknesses rather than simply accumulating hours. Teachers help musicians detect timing, articulation, phrasing, intonation, and expressive issues that performers may not hear reliably themselves. [PMC]pmc.ncbi.nlm.nih.govPMCby B Wisniewski · 2020 · Cited by 1984 — Feedback is information provided by an agent regarding aspects of one's performance or unders…
A violinist who repeatedly plays an entire piece may feel productive. A teacher may instead isolate four difficult bars and spend twenty minutes correcting one technical problem. The second approach feels slower but often produces greater improvement.
Professional Work
Many workplace skills suffer from delayed or absent feedback.
Managers may not discover communication weaknesses for years. Sales professionals may attribute outcomes to market conditions rather than technique. Analysts may repeatedly create reports that confuse decision-makers without understanding why.
Structured observation, coaching, and review systems create feedback that ordinary work often lacks. The goal is not surveillance but accelerated learning.
When Feedback Helps and When It Backfires
Feedback is powerful, but it is not automatically beneficial.
A major meta-analysis found that while feedback interventions improved performance on average, more than a third produced negative effects. Feedback can reduce performance when it shifts attention away from the task and towards self-consciousness, status concerns, or personal judgement. [ResearchGate]researchgate.netResearchGate(PDF) The Effects of Feedback Interventions on PerformanceA meta-analysis (607 effect sizes; 23, 663 observations) suggests t… [PMC]pmc.ncbi.nlm.nih.govPMCby B Wisniewski · 2020 · Cited by 1984 — Feedback is information provided by an agent regarding aspects of one's performance or unders…
Common failure modes include:
- Vague criticism without guidance.
- Excessive focus on personality.
- Feedback disconnected from observable behaviour.
- Too many corrections at once.
- Humiliating or threatening delivery.
- Delayed feedback that arrives after learning opportunities have passed.
High-quality coaches and experts typically do the opposite. They narrow attention to a small number of controllable adjustments and create a learning environment where errors become information rather than evidence of failure.
How to Use Expert Feedback More Effectively
The value of expert feedback depends partly on how it is used.
For high-stakes skills, several practices consistently improve the quality of the learning loop:
- Bring specific performances for review rather than general questions.
- Ask experts to identify the single highest-leverage improvement.
- Use recordings, drafts, simulations, or observable evidence whenever possible.
- Practise the correction immediately after receiving it.
- Track recurring errors over time.
- Seek feedback at regular intervals rather than waiting for major failures.
Most importantly, treat feedback as a measurement tool rather than a judgement of worth. The purpose is not to prove competence but to improve it.
In self-improvement that works, expert feedback matters because it exposes reality faster than experience alone. The higher the stakes and the more difficult the skill, the more valuable that acceleration becomes. Deliberate practice turns mistakes into data, and expert feedback ensures the data are interpreted correctly.
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Endnotes
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Source: datopian.com
Link: https://www.datopian.com/playbook/deliberate-practice -
Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC6824411/Source snippet
PMCDeliberate Practice and Proposed Limits on the Effects of...by KA Ericsson · 2019 · Cited by 520 — The paper concludes with recommend...
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Source: onlinelibrary.wiley.com
Title: j.1553 2712.2008.00227.x
Link: https://onlinelibrary.wiley.com/doi/10.1111/j.1553-2712.2008.00227.xSource snippet
Wiley Online LibraryDeliberate Practice and Acquisition of Expert Performance...3 Nov 2008 — Significant improvements in performance wer...
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Source: commoncog.com
Title: the problems with deliberate practice
Link: https://commoncog.com/the-problems-with-deliberate-practice/Source snippet
CommoncogThe Problems with Deliberate Practice30 Jan 2019 — In its most general form, Ericsson notes that feedback need not be immediate...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC4073287/Source snippet
PMCThe influence of deliberate practice on musical achievementby F Platz · 2014 · Cited by 220 — Here we present the first meta-analysis...
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Source: researchgate.net
Link: https://www.researchgate.net/publication/232458848_The_Effects_of_Feedback_Interventions_on_Performance_A_Historical_Review_a_Meta-Analysis_and_a_Preliminary_Feedback_Intervention_TheorySource snippet
ResearchGate(PDF) The Effects of Feedback Interventions on PerformanceA meta-analysis (607 effect sizes; 23, 663 observations) suggests t...
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Source: pmc.ncbi.nlm.nih.gov
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC6987456/Source snippet
PMCby B Wisniewski · 2020 · Cited by 1984 — Feedback is information provided by an agent regarding aspects of one's performance or unders...
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Source: researchgate.net
Link: https://www.researchgate.net/publication/23244224_Deliberate_Practice_and_Acquisition_of_Expert_Performance_A_General_OverviewSource snippet
Deliberate Practice and Acquisition of Expert Performance8 May 2026 — The training model was grounded in Kolb's experiential learning cyc...
Published: May 2026
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Source: frontiersin.org
Link: https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2019.02396/fullSource snippet
FrontiersDeliberate Practice and Proposed Limits on the Effects of...by KA Ericsson · 2019 · Cited by 520 — The original stimulus for th...
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Source: pubmed.ncbi.nlm.nih.gov
Link: https://pubmed.ncbi.nlm.nih.gov/18778378/Source snippet
PubMedDeliberate practice and acquisition of expert performanceby KA Ericsson · 2008 · Cited by 2875 — In this article, we draw upon the...
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Source: sciencedirect.com
Title: ScienceDirect Deliberate Practice
Link: https://www.sciencedirect.com/topics/psychology/deliberate-practiceSource snippet
Deliberate Practice - an overviewEricsson et al. define deliberate practice as a well-defined task with immediate feedback, opportunities...
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Source: pubmed.ncbi.nlm.nih.gov
Link: https://pubmed.ncbi.nlm.nih.gov/15383395/Source snippet
practice and the acquisition and maintenance of...by KA Ericsson · 2004 · Cited by 4050 — Deliberate practice and the acquisition and ma...
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Source: paulogentil.com
Link: https://paulogentil.com/pdf/Deliberate%20practice%20and%20acquisition%20of%20expert%20performance%20-%20a%20general%20overview.pdfSource snippet
Paulo GentilDeliberate Practice and Acquisition of Expert Performanceby KA Ericsson · Cited by 2875 — DP also involves the provision of i...
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Source: journals.sagepub.com
Link: https://journals.sagepub.com/doi/abs/10.3102/003465430298487Source snippet
Sage JournalsThe Power of Feedback - John Hattie, Helen Timperley, 2007by J Hattie · 2007 · Cited by 28896 — This article provides a conc...
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Source: frontiersin.org
Link: https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2019.03087/fullSource snippet
The Power of Feedback Revisited: A Meta-Analysis...by B Wisniewski · 2020 · Cited by 2032 — From this, Hattie and Timperley (2007) argue...
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Source: sciencedirect.com
Title: Deliberate Practice
Link: https://www.sciencedirect.com/topics/computer-science/deliberate-practiceSource snippet
an overviewDeliberate practice in the context of Computer Science refers to engaging in effortful training activities over a long period...
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Source: scribd.com
Link: https://www.scribd.com/document/702759844/The-Effects-of-Feedback-InterventionsSource snippet
, and a Preliminary Feedback Intervention TheoryRead more...
Additional References
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Source: medium.com
Link: https://medium.com/swlh/deliberate-practice-35f544f4713fSource snippet
Deliberate Practice. The Feedback Series 2/3Deliberate Practice is a theory by Anders Ericsson, described in his book Peak (YouTube summa...
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Source: fs.blog
Link: https://fs.blog/deliberate-practice-guide/Source snippet
The Ultimate Deliberate Practice Guide: How to Be the BestDeliberate practice is the key to expert performance in writing, teaching, spor...
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Source: mededmentor.org
Link: https://mededmentor.org/theory-database/theory-index/deliberate-practice-theory/ -
Source: pas.org
Link: https://pas.org/pas-blog/deliberate-practice-strategies-part-1-what-is-deliberate-practice-why-to-use-it-and-how/Source snippet
Part 1: What is Deliberate Practice, Why to Use It, and How?29 Mar 2021 — This series examines and applies elements from the author's for...
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Source: blog.performancecoach.ai
Link: https://blog.performancecoach.ai/the-science-of-deliberate-practice-how-feedback-loops-accelerate-skill-development/Source snippet
Science of Deliberate Practice for MusiciansFeb 21, 2026 — Deliberate practice is focused, goal-directed work on specific weaknesses with...
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Source: pitjournal.unc.edu
Title: building an expert the deliberate practice debate in music performance
Link: https://pitjournal.unc.edu/2023/01/05/building-an-expert-the-deliberate-practice-debate-in-music-performance/Source snippet
Deliberate Practice Debate in Music PerformanceJan 5, 2023 — This paper examines the debate concerning deliberate practice's value in imp...
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Source: ysamphy.com
Link: https://ysamphy.com/anders-ericsson-deliberate-practice/Source snippet
res that you keep your effortful practice and do not fall for automaticity as you get...Read more...
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Source: esmed.org
Title: enhancing resident feedback using hattie and timperley model
Link: https://esmed.org/enhancing-resident-feedback-using-hattie-and-timperley-model/Source snippet
The effects of feedback interventions on performance: A historical review, a meta-analysis, and a preliminary feedback intervention theor...
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Source: esmed.org
Title: hattie and timperleys feedback model in resident education
Link: https://esmed.org/hattie-and-timperleys-feedback-model-in-resident-education/Source snippet
The effects of feedback interventions on performance: A historical review, a meta-analysis, and a preliminary feedback intervention theor...
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Source: thecorecollaborative.com
Link: https://thecorecollaborative.com/feedback-that-grows-learning-and-why-our-brains-sometimes-fight-it/Source snippet
review, a meta-analysis, and a preliminary feedback intervention theory.Read more...
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