A Third of Your Feedback Is Making Your Reps Worse

The short version: A 1996 meta-analysis of 607 effect sizes found that feedback improved performance on average but decreased it in more than a third of cases. The deciding variable is where the recipient's attention lands. Feedback aimed at the task improves performance; feedback that lands on the self degrades it. Sales coaching is structurally arranged to land on the self.

The call ends. The manager unmutes.

"So — a few things."

The rep has heard this before. Not these words exactly. But this shape. The pause. The sharp inhale. The three things that are about to become five.

He is already somewhere else. Already defending. Already building the case in his head for why the deal was different, why the prospect was hostile, why this call doesn't count.

The manager is coaching.

The rep is not being coached.

What the research actually found

In 1996, Avraham Kluger and Angelo DeNisi published a meta-analysis in Psychological Bulletin that should have changed how every organisation on earth thinks about feedback. It didn't. Most sales leaders have never heard of it.

They pooled 607 effect sizes across 23,663 observations. They asked a question so basic it had gone unexamined for most of a century: does feedback improve performance?

The average effect was positive. Modest, but real.

And in more than a third of the cases, feedback made performance worse.

Not neutral. Worse. Measurably, reliably worse than giving no feedback at all.

That finding could not be explained away by sampling error. It could not be explained by whether the feedback was positive or negative. It could not be explained by any theory available at the time.

So they built a new one.

The mechanism

Kluger and DeNisi proposed that feedback works by moving attention. And attention can land in three places.

The task. The specific thing being done. The question that wasn't asked. The moment the buyer went quiet and nobody noticed.

The motivation to do the task. The gap between where you are and where you're supposed to be. Quota. Ranking. The number on the board.

The self. Am I any good at this. What does he think of me. Is my job safe.

Feedback that lands on the task improves performance.

Feedback that lands on the self degrades it.

The further attention travels from the work toward the worker, the worse the outcome. That is the finding. It is thirty years old and it is still, in most sales organisations, completely unimplemented.

Why sales coaching lands on the self

Consider the ordinary conditions of a sales coaching conversation.

It is delivered by the person who controls the rep's compensation, territory, and continued employment.

It arrives days after the call, when the specifics have gone soft and only the verdict remains.

It is delivered in a one-to-one, the same room where performance management happens, using the same tone.

It arrives as a summary judgment — "you're not qualifying hard enough" — rather than a moment: at eleven minutes in, she said budget was tight and you moved to features.

Every one of those conditions pushes attention up the hierarchy. Away from the task. Toward the self.

The manager thinks he is coaching a behaviour.

The rep hears a referendum on whether he is any good.

The thing nobody wants to say

Most sales organisations have concluded that their coaching problem is a volume problem. Not enough of it. Managers too busy. Cadence slipping. The remedy is always the same: more one-to-ones, more call reviews, more structure around a thing that is assumed to be good in proportion to how much of it happens.

But if a third of feedback interventions degrade performance, then more of it is not automatically better. More of it is a bet.

You could double your coaching hours and move your numbers backwards. The literature says that is not a hypothetical. It happens in roughly one case in three.

Volume is not the variable.

Where attention lands is the variable.

What this changes

It changes what you measure. "Did the coaching happen" is the wrong question. "What was the rep thinking about while it happened" is closer to the right one — and considerably harder to answer.

It changes the unit. A summary is a verdict. A moment is a task. "You need to build more rapport" points at the person. "She mentioned her son twice and you moved to the agenda both times" points at the work. The second is harder to write and impossible to argue with.

It changes the timing. Attention lands on the task most easily when the task is still warm. A week later, there is no task left to attend to — only a record, and a person, and a judgment.

And it changes who is qualified to give it. Not the person with the most experience. The person whose observation the rep can hear without defending himself.

The uncomfortable part

Every sales leader reading this believes their feedback is the good kind. Task-focused. Specific. Well received.

Kluger and DeNisi's third does not know it is the third.

That is the whole problem with feedback quality: the only people who can assess where attention landed are the reps, and the reps are not being asked.

I trace every number I cite back to a named source now. The evidence standard I hold myself to is the reason this post names Kluger and DeNisi.

Common questions

Does feedback always improve performance?

No. Kluger and DeNisi's meta-analysis of 607 effect sizes found feedback improved performance on average, but decreased it in over a third of cases. The negative results could not be explained by sampling error or by whether the feedback was positive or negative.

Why does some feedback make performance worse?

Because feedback moves attention, and attention can land on the task, on motivation, or on the self. The further attention travels from the work toward the worker, the worse the outcome. Feedback that prompts a rep to evaluate himself rather than the call degrades performance.

What does "coach the process, not the person" actually mean?

It means naming a moment rather than delivering a verdict. "You need to build more rapport" points at the person. "She mentioned her son twice and you moved to the agenda both times" points at the work. The second keeps attention on the task, where it improves performance.

Should sales managers coach less often?

Not necessarily less — but volume is not the variable. If a third of feedback interventions degrade performance, adding one-to-ones without changing what happens inside them is a bet, not a fix.

Coach the process, not the person. Not because it's kinder. Because it works, and the other way doesn't.

Source

• Kluger, A. N., & DeNisi, A. (1996). The effects of feedback interventions on performance: A historical review, a meta-analysis, and a preliminary feedback intervention theory. Psychological Bulletin, 119(2), 254–284.