Deliberate Practice at Work: Why One Training Session Rarely Changes Behavior

TL;DR. A good training session can build understanding. Whether people behave differently afterwards depends on what happens next. Deliberate practice means working on a specific situation, receiving feedback against a clear standard, and trying again. In most organizations, the difficulty is not the method itself. It is creating enough opportunities to practise without requiring a coach or manager for every repetition. This article looks at what the research actually supports, where deliberate practice has limits, and what changes when people can practise more often.

Key Takeaways

• At Schwäbisch Hall, participants who practised with Sleak reached 72.5% action competence in the transfer test, compared with 61.4% in the course-only group.
• The measured gap between knowledge and application fell from 32.9 points to 13.9 after two simulated practice conversations.
• Deliberate practice matters, but it does not explain performance on its own. A 2014 meta-analysis found that it accounted for 26% of performance variance in games, 21% in music, 18% in sports, 4% in education and less than 1% in professions.
• Traditional group training limits individual practice time. At Schwäbisch Hall, around ten participants typically trained with one coach, meaning each person might only get one attempt.
• At Energieversum, new hires increased their practice volume from between one and ten sales conversations to around 35, while weekly one-to-ones fell from about an hour to roughly 15 minutes.

A workshop ends. The feedback is positive. The material made sense. People leave with new ideas and a clearer picture of what they should do differently.

A few weeks later, a much more important question remains: Are they actually doing anything differently?

That is where training often runs into trouble.

A sales representative may understand perfectly well how to respond to a price objection. A manager may know what good feedback should sound like. Someone can explain a negotiation framework in detail and still revert to an old habit when the real conversation becomes uncomfortable.

Understanding and execution are not the same thing.

In many other fields, this distinction is obvious. Pilots do not prepare for difficult situations by attending a presentation once. Musicians do not improve by discussing a piece of music without playing it. Surgeons build competence through repeated application under controlled conditions.

Corporate training often puts far more emphasis on explanation than on repetition.

That leaves people with knowledge, but very little opportunity to test whether they can use it when it matters.

Deliberate practice addresses that gap.

Why knowledge does not automatically become behavior

Imagine a salesperson who has just completed training on handling price objections.

She understands the logic. She knows the recommended structure. She can probably explain it back to the trainer.

Then the next customer says, "Your price is too high."

Under pressure, she falls back on the response she has used for years.

This is one of the central problems in learning transfer. Knowing what to do in theory does not guarantee that the behavior is available quickly enough in a real situation.

The size of that gap can be measured.

In a quasi-experimental transfer study at Schwäbisch Hall, the difference between what participants knew and what they actually applied in conversation started at 32.9 points. After two simulated practice conversations, the gap had fallen to 13.9 points.

The knowledge levels of the groups were comparable. The meaningful difference was that one group had actually practised applying the material.

Learning research has documented a related principle for decades. Actively retrieving information strengthens memory more effectively than simply reviewing it again, often described as test-enhanced learning or the testing effect (Roediger & Karpicke, 2006).

For conversation training, the distinction is straightforward.

Reading a slide about how to answer an objection tells you what the response should look like.

Saying the words yourself forces you to produce the response.

That is a different kind of learning.

What deliberate practice actually means

The concept of deliberate practice is closely associated with the 1993 work of Ericsson, Krampe and Tesch-Römer, published in Psychological Review. Their research examined how structured practice contributed to the development of high levels of performance, including among musicians.

The important part is not simply repetition.

Deliberate practice is targeted.

A broad goal such as "become better at negotiation" is too vague. A useful practice task would be something more specific: respond when a buyer says the budget for the year has already been committed.

There also needs to be a standard.

What should a strong response include? What would count as a weak one? What should the person try to improve?

After the attempt comes feedback, ideally while the situation is still fresh.

Then comes the part that often disappears in workplace training: another attempt.

Without that second attempt, feedback remains theoretical. Someone has been told what they could improve, but has not yet shown that they can actually do it differently.

That makes the quality of the standard particularly important for leadership and people development teams.

If an organization cannot describe what good performance looks like in a specific situation, it becomes very difficult to judge whether someone is improving.

In leadership and employee conversations, this standard is often the missing piece. Most organizations have an idea of what good communication should feel like. Far fewer have written down what it looks like in a particular conversation.

Why deliberate practice is difficult to scale

The method itself is relatively simple.

Practise something specific. Get feedback. Try again.

The difficulty begins when ten, fifty or five hundred people need to do it.

Every repetition takes time. In a traditional role play, it also requires the attention of a trainer, coach or experienced manager.

At Schwäbisch Hall, a typical group session involved around ten participants and one coach. While one person practised, the others watched.

That can still be useful. People learn from observing each other.

But the amount of individual practice remains limited.

If each participant only gets one turn, there is little room for a proper feedback loop. The person performs, receives comments and the session moves on.

At Energieversum, the constraint appeared in a different form.

A single one-to-one training session could take up to 90 minutes. A team lead would play the customer, observe the conversation and then provide detailed feedback.

There was nothing wrong with the quality of that coaching.

The problem was capacity.

If every new hire needed several sessions of that length, experienced team leaders would spend a substantial share of their time running practice conversations. The organization could only train so many people at once.

This turns deliberate practice into an operational question:

How many useful repetitions can you realistically give each employee?

What repeated practice can look like at work

A useful practice loop starts with a situation that is specific enough to repeat.

The employee has the conversation. Their performance is evaluated against a predefined standard. They receive feedback, then repeat the same situation or a closely related one.

That second attempt is important because it shows whether the feedback translated into different behavior.

At Sleak, the standard is captured in a Scorecard. It defines what a strong conversation should contain and which criteria are used to assess performance.

In Training Mode, an employee selects a Training Scenario and speaks with a virtual persona. Afterwards, the AI Coach evaluates the conversation and refers to specific parts of the transcript.

Coaching Mode serves a different purpose. It is used to build understanding through dialogue. An Initiative brings the different learning activities together around a development goal, for example one set by a manager.

The practical exercises take place through voice-based AI role plays, either in the browser or over the phone.

The interesting part is not the technology itself.

It is what happens to the economics of repetition.

If every additional practice conversation no longer requires a trainer to be present, people can practise much more often.

More than 72,000 conversations have now been completed on the Sleak platform across more than 600 organizations.

That changes where human coaching time is spent. Managers and trainers no longer need to be present for every repetition and can focus more of their attention on situations where experience, context and judgement really matter.

What changes when people practise more?

The transfer study at Schwäbisch Hall provides a useful example because it compared a practice group with a course-only control group.

The largest measured improvement happened between the first and second practice conversation, where performance rose by 14.1 points.

From the second practice conversation to the later transfer conversation, performance increased by another 6.5 points.

That suggests that even a small number of repetitions can make a measurable difference.

It is equally important not to overstate the study.

There were 24 participants in total, with 13 in the control group and 11 in the practice group. It was a small quasi-experimental study conducted within one organization.

The results should therefore not be treated as a universal benchmark.

What makes the study useful is the pattern it shows.

Both groups had comparable knowledge. The difference appeared when they had to use that knowledge in conversation.

How much performance can deliberate practice really explain?

Deliberate practice has sometimes been associated with much larger claims than the research supports.

The popular version is often connected to the idea that expertise is primarily the result of accumulating very large amounts of practice, sometimes simplified into the so-called ten-thousand-hours rule.

The evidence is more nuanced.

A meta-analysis by Macnamara, Hambrick and Oswald in 2014 examined the relationship between deliberate practice and performance across several domains.

Deliberate practice explained 26% of performance variance in games, 21% in music, 18% in sports, 4% in education and less than 1% in professions.

So practice is not a complete explanation for why one person performs better than another.

Ability, experience, motivation, environment, cognitive differences and many other factors also matter.

For an organization, however, the practical question is slightly different.

A company does not need to prove that practice explains every difference between two employees.

It needs to know whether better practice can improve the part of performance that is trainable.

If two groups start with comparable knowledge and the group that practises performs better in a later transfer test, that is useful information.

It does not mean practice has solved the question of talent.

It means some of the distance between knowing and doing can be reduced.

That is already valuable.

What classroom training still does better

More practice does not make trainers, workshops or live sessions unnecessary.

Some things are better taught in a room with other people.

A new or complex concept may need explanation. Strategic questions often benefit from discussion. People learn from hearing how experienced colleagues think through a problem. Some development conversations depend on trust, context and personal judgement in ways that cannot be reduced to a scoring framework.

Repeated practice serves a different purpose.

It becomes most useful after someone broadly understands the concept and now needs to make the behavior more reliable.

A workshop can explain why a certain response works.

Practice gives the employee the chance to say it, get it wrong, receive feedback and try again.

Those are different jobs.

Both matter.

In practice: Energieversum

The experience at Energieversum shows what can happen when practice volume increases.

Before the change, many new employees reached the final onboarding day having completed somewhere between one and ten practice sales conversations.

Afterwards, that number rose to around 35 conversations per new hire.

The effect was not limited to the learners.

It also changed how managers used their time.

Weekly one-to-one sessions that previously lasted around an hour now take roughly 15 minutes, because much of the repetition happens before the meeting rather than during it.

Across six or seven sessions, that represents at least five hours of team-lead time saved for each representative onboarded.

Marc Weißbrenner, Head of Field Sales, described the previous setup this way:

"The individual role plays consumed the time and the expertise of our best team leads. Now we no longer need them for every practice conversation."

That distinction matters.

Experienced managers are still valuable.

Their time is simply no longer required for every single repetition.

They can spend more of it on the conversations where their judgement and experience make the biggest difference.

FAQ

How is deliberate practice different from ordinary practice?

Ordinary practice often means repeating something you already know how to do.

Deliberate practice focuses on an area that is not yet reliable. The task is specific, the standard is clear, feedback follows the attempt, and the person gets another chance to apply it.

The task should usually sit slightly beyond the person's current comfort level.

That is one reason deliberate practice tends to feel more demanding than routine repetition.

How many repetitions does it take before behavior changes?

There is no universal number.

The complexity of the task matters, as does the person's starting level. Handling a simple objection is different from managing a complex negotiation or a sensitive employee conversation.

In the Schwäbisch Hall study, the largest measured improvement occurred between the first and second practice conversations. Performance continued to rise afterwards.

That suggests a few complete practice cycles can already be useful.

It does not mean two repetitions are enough for every skill.

Does deliberate practice improve knowledge or behavior?

The Sleak measurements described here focus on application in conversation, referred to as action competence.

In the transfer study, the groups had comparable knowledge levels. The difference appeared in how well they applied that knowledge.

Building knowledge is a separate part of learning and may require different formats.

Deliberate practice is especially useful once the goal is to turn existing knowledge into behavior that can be produced reliably.

Does this replace the trainer?

No.

It changes where trainer and manager time is most useful.

Repetition and structured evaluation against a defined standard can be scaled. Explaining new concepts, discussing complex situations and helping someone think through their own development still benefit from human experience.

The aim is not to remove coaching.

It is to stop using scarce coaching time for every repetition.

Conclusion

Many training problems do not start during the workshop.

They start afterwards.

People may understand the content and still fall back on familiar behavior when the real situation becomes difficult.

If the goal is behavior change, explanation alone is not enough.

People need opportunities to try the behavior themselves, make mistakes, receive specific feedback and try again.

Deliberate practice is not a guarantee of high performance, and it does not explain every difference between people. The research gives no reason to claim otherwise.

Its practical value is more modest, and more useful.

It helps organizations work on the gap between what people know and what they can actually do.

So after a training session, perhaps the most important question is not only:

What did people learn?

It is also:

How often did they get to practise it?

Related reading

• Completion Is Not Competence: Why Every L&D Metric You Report Is Wrong
• The Coaching Gap: Why Managers Are Accountable for Outcomes They Have No Tools to Produce
• Initiatives, Not Courses: A New Organizational Model for People Development
• Scorecard-Based Coaching: How Structured Feedback Transforms Sales Training