Indeed. This study is complete bullshit: https://www.gwern.net/SMPY#fn1 https://www.gwern.net/SMPY#fn1 It contradicts every (non-self-selected) longitudinal or

Indeed. This study is complete bullshit: https://www.gwern.net/SMPY#fn1 https://www.gwern.net/SMPY#fn1 It contradicts every (non-self-selected) longitudinal or cross-sectional study, including far more elite samples (which if their theory was correct would show vastly more dysfunctionality, except of course it isn't and those samples don't), and every genetic study as well, and the reported (self-diagnosis) rates are often orders of magnitude larger than any risk factor ever confirmed and literally unbelievable. Incidentally, Hambrick's writeup here is also quite bad. Aside from failing to mention all of those reasons why it's BS, he doesn't describe accurately the research he does mention. Consider this paragraph from the end: > All the same, Karpinski and her colleagues’ findings set the stage for research that promises to shed new light on the link between intelligence and health. One possibility is that associations between intelligence and health outcomes reflect pleiotropy, which occurs when a gene influences seemingly unrelated traits. There is already some evidence to suggest that this is the case. In a 2015 study, Rosalind Arden and her colleagues concluded that the association between IQ and longevity is mostly explained by genetic factors. How did he miss the fact that the Arden study in question shows, as all such studies show, that intelligence correlates with greater lifespan/longevity when he's written an entire credulous column about how intelligence is bad for you and makes people crazy and increases the rate of mental disorders (some of which, like schizophrenia, reduce your life expectancy by decades)? It's right there in the abstract, it's not hidden away. One would think that would at least merit a brief pause to puzzle over the discrepancy...