The Field Guide › Paper
The foundational meta-analysis of feedback, and the standing corrective to the assumption that feedback reliably improves performance. Synthesising 607 effect sizes across 23,663 observations, Kluger and DeNisi found that feedback interventions did raise performance on average (d = .41), but that in over a third of cases feedback actually made performance worse, a finding they note had been produced and largely ignored since the beginning of the century. To explain why the same intervention helps in some cases and harms in others, they propose feedback intervention theory (FIT). The core mechanism concerns where feedback directs attention. Behaviour is regulated by a hierarchy running from the details of the task, up through task-motivation processes, to the self. Feedback works when it keeps attention on the task and how to do it; it backfires when it pushes attention up to the level of the self, because cognitive resources are then diverted from the task into self-evaluation, defence, and affect. This is why feedback that is normative (comparing the person to others), that praises or threatens the ego, or that is experienced as a verdict on the person rather than the work, tends to depress performance even as it feels significant. The relevance to psychological safety is direct and reinforces the critical line this corpus already takes on feedback (most directly in the 360-degree feedback critique). Feedback that draws attention to the self is precisely feedback that raises the interpersonal stakes: it is received as a threat to standing and competence, the very risk psychological safety is meant to lower, and it provokes the self-protective responses that foreclose learning. FIT implies that feedback becomes useful under roughly the conditions psychological safety describes: when it is task-focused rather than person-focused, framed for learning rather than judgement, and delivered where the recipient can attend to the work without defending the self. It is the empirical anchor for the practitioner point that feedback is not automatically good, and that its design and framing determine whether it teaches or merely threatens. The practice's own Feedback in the Workplace research pulse, a small self-report survey rather than a performance meta-analysis, reports the same shape from the receiving end: most respondents recall feedback that undermined their confidence, and about as many say feedback has lowered their sense of psychological safety over their careers as say it has raised it.