HCD.10:3 - Forces

• Stable supported practice can establish the basic action, while unchanged conditions can produce cue-bound success.
• Variation can expose decision rules, while cosmetic or excessive variation adds noise without a useful discrimination.
• Separated episodes can support later access, while one universal interval cannot fit different tasks, histories, and horizons.
• Retrieval can exercise unaided recovery, while expert later Work may legitimately depend on references, tools, or current data.
• Interleaving can require Method selection among similar cases, while blocked practice can be better for an unfamiliar basic operation.
• Less guidance can expose a human contribution, while premature withdrawal can increase avoidable load or unsafe error.
• More challenge can expand the practice envelope, while a failed attempt may indicate access, applicability, support, or task-design failure instead of capability loss.
• A scheduled later episode supplies an observation, while transfer and retention conclusions require their own task, delay, support, and practice-history argument.