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It was recently suggested in a study published in Nature Human Behaviour thatthe historical loosening of American culture was associated with a trade-offbetween higher creativity and lower order. To this end, Jackson et al. generatea linguistic index of cultural tightness based on the Google Books Ngram corpusand use this index to show that American norms loosened between 1800 and 2000.While we remain agnostic toward a potential loosening of American culture and astatistical association with creativity/order, we show here that the methodsused by Jackson et al. are neither suitable for testing the validity of theindex nor for establishing possible relationships with creativity/order.

Both the validity of the cultural tightness index and the association with creativity and order are spurious -- a comment on Jackson et al