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The Köhler Effect
Groups usually dampen individual effort. Under one specific condition they raise it, and the person who gains the most is the one least able on the task.
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Recognition Works on the People Who Don't Get It
Unannounced thank-you cards raised output on a data-entry shift. Most of the gain came from the people who didn't receive one.
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The Endowed Progress Effect
Two loyalty cards, eight car washes of real work either way. The card that arrived with two stamps already filled in got completed almost twice as often.
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The Detachment Dividend
Two people, same workload. The one who shows up energized tomorrow is usually the one who could mentally switch off after hours. Psychologists call it detachment, and it's trainable.
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The Manager Variance Multiplier
Gallup found managers account for at least 70% of the variance in team engagement. Not pay, not perks, not the mission. The manager. Here's what that means for where you invest.
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The Mere Urgency Effect
People chase urgent tasks even when an important one pays far more. The deadline, not the value, drives the choice. Here's how to defend your team's real priorities.
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The Gratitude Gap
People who write genuine thank-you notes consistently underestimate how good the note makes the recipient feel, and overestimate how awkward it will be. That double error is why most appreciation never gets sent.
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The Gut-Feel Penalty
Structured interviews predict job performance about twice as accurately as the free-flowing kind. The difference isn't the questions. It's whether every candidate answers the same ones.
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The Peltzman Effect at Work
Mandatory seatbelts cut driver deaths. They raised pedestrian deaths. Drivers drove faster when they felt safer. The same pattern runs through workplace safety programs.
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The Spotlight Effect
We think people noticed our slip. Mostly they didn't. Gilovich's research shows we overestimate how much others watch us by about twice the actual rate.
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The Pygmalion Effect
When teachers were told random students were "academic bloomers," those students posted 10-25 point IQ gains in a year. The same effect runs through your team, whether you know it or not.
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The Silence Tax
Your team is holding back. Not because they're afraid. Because they've decided it won't matter. Futility, not fear, is the top reason employees stay silent.