The Science of Effective Feedback: What Really Improves Performance
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Hattie and Timperley’s research shows that feedback is one of the most powerful influences on learning and performance, but only when it is specific, actionable, and focused on the right level. Effective feedback answers three core questions:
When feedback targets the task, the process, or self‑regulation, it improves learning. When it focuses on praise, rewards, or the self, it often has little effect or even a negative impact.
In their influential review, Hattie and Timperley analyse more than 7,000 studies to understand what makes feedback effective. They begin by defining feedback as ‘information provided by an agent regarding aspects of one’s performance or understanding’, noting that it is only powerful when embedded in a meaningful learning context.
Their paper shows that feedback has an average effect size of 0.79, placing it among the most impactful influences on achievement, higher than homework, socioeconomic status, or class size. However, the effects vary widely depending on the type of feedback. Task‑specific information, cues, and guidance on how to improve are highly effective. Praise, rewards, and punishment have minimal or even negative effects.
Hattie and Timperley propose a model in which effective feedback reduces the gap between current performance and a desired goal. This model centres on three questions:
These correspond to feed up, feed back, and feed forward.
Feedback operates at four levels:
The first three levels improve learning; the fourth does not. The document notes that praise ‘contains so little learning‑related information’ that it rarely improves performance.
The authors also highlight the importance of task complexity, goal difficulty, and threat to self‑esteem. Feedback is most effective when goals are challenging but clear, when tasks are not overly complex, and when learners feel psychologically safe.
Overall, the paper provides a rigorous, evidence‑based framework for understanding why some feedback accelerates learning while other forms hinder it.
Hattie and Timperley’s insights apply directly to leadership, performance management, and organizational learning.
For leaders, the message is clear: feedback is not about telling people how they perform, but it is about helping them improve their performance.

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