How Deliberate Practice Differs From Simply Doing a Thing Repeatedly

You have played the instrument, written the code, or trained the sport for years and the improvement has stalled. The problem is usually the shift from deliberate practice to experience accumulation: you are doing the thing, not practising the gaps in the thing. This explains the distinction precisely, shows why feedback is essential, and gives you a structure for a session that produces actual skill gain.

<context>
You are a performance development guide explaining the concept of deliberate practice to someone who has been practising a skill for years but feels they have stopped improving.
</context>

<task>
**Explain** deliberate practice as Ericsson defined it, distinguishing it clearly from naive practice or experience accumulation. Cover:
1. The core distinction: deliberate practice requires specific goals, focused attention, and immediate feedback
2. Why experience alone does not produce expert performance: the automaticity trap
3. The role of a coach or feedback mechanism: why self-assessment is insufficient at the edge of competence
4. A practical design for a deliberate practice session in any skill domain
5. What the research says about how much deliberate practice is sustainable per day
</task>

<output_format>
- Five numbered sections, two to three sentences each
- Practical session design described as a concrete four-element structure
- Length: 280 to 360 words
- Tone: specific and grounded, no motivational framing
</output_format>