Scientists: Few birth order effects replicate, those that do are tiny and unimportant; old effect sizes were likely overestimates. Science journalists: ENIGMATIC birth order effectshttps://twitter.com/DegenRolf/status/1164433938166755328 …
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Science writer and book author in psychology, neuroscience and evolution
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Ruben C. Arslan Retweeted Rolf Degen
Scientists: Few birth order effects replicate, those that do are tiny and unimportant; old effect sizes were likely overestimates. Science journalists: ENIGMATIC birth order effectshttps://twitter.com/DegenRolf/status/1164433938166755328 …
Ruben C. Arslan added,
I thought the non-replicated results were about psychological traits; I have posted about those failures. But here it is more about economic effects. Don't know about those.
I was a little unfair to you; you posted about null results too, but journos really love BO effects a bit much. As far as I can tell, economic effects are fairly small too, and I think describing small effects like rare species is a bit misleading (even tho both hard to find).
Here is what the paper says about the affected outcomes and effect sizes. I have my own doubts, I never believed in effects on personality, because they contradict behavior genetic basics. But how should I have reported this?pic.twitter.com/p02i976d9L
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