2min chapter

WorkLife with Adam Grant cover image

Malcolm Gladwell Experiments with Adam's Class

WorkLife with Adam Grant

CHAPTER

How Did Roger Barnsley Discover the Relative Age Effect?

The relative age effect was discovered in the 1980s by Canadian psychologist Roger Barnsley. The explanation for who gets to the top of the hockey world is a lot more interesting and complicated than it looks. "Good Lord. I do not sound like I'm enjoying reading my own book," says John Sutter, author of Outliers.

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