Archive | February, 2018

The 90-Minute Rule

“Human beings aren’t designed to expend energy continuously. Rather, we’re meant to pulse between spending and recovering energy.” – Tony Schwartz (source) In the late 1950’s, researchers William Dement and Nathaniel Kleitman documented that humans sleep in 90-minute cycles – from light to deep sleep and back to light sleep again. Professor Kleitman later discovered…

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When Promoting People, Beware the False Record Effect

After writing about several examples of bias from insensitivity to sample size, a former colleague asked whether I thought performance in the workplace was subject to the same bias. She observed that people were sometimes rewarded or even promoted for high performance, even if that performance was sporadic rather than sustained. She asked: Shouldn’t the…

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