> Respondents, who ranged in age from 25 to 65, were asked to estimate how many books were in their house when they were 16 years old. The research team was int

> Respondents, who ranged in age from 25 to 65, were asked to estimate how many books were in their house when they were 16 years old. The research team was interested in this question because home library size can be a good indicator of what the study authors term “book-oriented socialization.” Participants were able to select from a given range of books that included everything from “10 or less” to “more than 500.” In order words, they just used the number of books as an indicator that very likely correlates with how much people used to read as kids, how many books their parents could afford and how much their parents cared about education and so on. If you accept this correlation, the results of the study become somewhat trivial. It's amazing how the people at Smithsonian Magazine maganaged to spin this as a causal relationship, though, in the sense of "Just surround yourself with books and it'll have a powerful, lasting effect on your mind." Relevant xkcd: https://xkcd.com/552/ https://xkcd.com/552/