As a side note, it also throws doubt on Woodley's evidence for #dysgenics from changes in word usage rates, does it not? Not entirely sure what the implication here is.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4404736/ …
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Cool study on the IRT analysis of vocabulary items by age group. This reveals obvious and large violations of measurement invariance for many words. This finding has important implications for the interpretation of age patterns in ability scores. https://www.ncbi.nlm.nih.gov/pubmed/25402336 pic.twitter.com/eTs4n8lj64
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