The famous Pygmalion Effect is unreplicable. The bad science that produced it provoked a replication crisis, but it didn't take. The depressing full story is here:https://thenewstatistics.com/itns/2018/04/03/weve-been-here-before-the-replication-crisis-over-the-pygmalion-effect/ …
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Replying to @TheNewStats
Won't surprise.
@PsychRabble I was surprised you didn't go further in your book, but it is from 2012 before the statistical problems were as clear as they are now.1 reply 0 retweets 4 likes -
Replying to @KirkegaardEmil @TheNewStats
Well, Pygmalion SFP effects are "unreplicable" goes a bit too far, I think. More like "wildly overstated." Kinda like: implicit bias, stereotype threat, microaggressions, social priming, and so much more. This chart is based on data reported in my 2012 book:pic.twitter.com/NEGumr5DgR
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Replying to @PsychRabble @KirkegaardEmil
I had your 2005 review, but hadn't seen the book--just read chapter 3 and will read it all; it's fantastic. In the blog I was more careful (and have now made some updates based on what I've read so far from your book).
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To be clear - I am articulating criticism of the original study (I think there is a convincing argument it is deeply flawed) and of the notion expectancy can strongly shape IQ. But I tried to distinguish (based on your review) that expectancy effects are real and important.
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I do have a question. In the book you buy into Rosenthal's "low reliability makes it harder to detect significance" argument. Do you still? I'm convinced by Galman that this is not a valid defense (e.g. http://andrewgelman.com/2017/02/11/measurement-error-replication-crisis/ …)
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Replying to @TheNewStats @KirkegaardEmil
I see Gelman's argument differently, and as not undermining the basic "low reliability reduces probability of finding stat significant result." But it does not really matter because conclusions about SFPs can/should be based on way more than R&J(1968). 1/2
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But on R&J in particular, the best argument that they found nothing at all is not low reliability. Is that they had a handful of wild outliers; kids showing 100pt IQ increases in 1yr. Exclude those, and nothing was signif.
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I highly recommend reading Spitz book on raising intelligence. Sets the prior right. https://emilkirkegaard.dk/en/?p=4010
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