把一条学习原理，连到你能改的那一处设计。

Actionable task- and process-focused feedback

Give specific information about the current task or strategy and a usable next step, then allow the learner to act on it.

Recommendation

Strong candidate when it is informative, task-focused, proportionate, and followed by action.

Mechanism

Feedback reduces uncertainty about the gap between current and desired performance and can redirect strategy and monitoring.

Applicable contexts and prerequisites

Learner Stages

• early-childhood
• K-12
• adult

Task Types

• practice
• draft revision
• skill refinement

Contexts

• teacher feedback
• peer review
• adaptive system

Lifespan Stages

• cross-lifespan

• A clear goal or success criterion
• An authentic opportunity to revise or retry

Constraints and risks

• Calibrate amount and timing
• Preserve the learner's next cognitive action

• Person-focused praise or blame
• Answer-giving that creates dependence
• Overload or interruption
• Assuming feedback is uniformly beneficial

Observable evidence

• Indicator

  Feedback uptake and reduced repeated error

  Measure

  Revision quality, next-task strategy, independent performance, and error recurrence

  Timing

  On the next attempt and delayed transfer

  Caveat

  Learner satisfaction is not a learning measure

Evidence

strong

Large meta-analytic evidence shows a positive average with substantial heterogeneity and documented negative effects.

Confidence

high

Directness

direct-intervention

Generalizability

Broad, but effects depend on attention target, information content, timing, and opportunity to act.