Scott Alexander investigates the unexpectedly high prevalence of joint hypermobility in transgender individuals, exploring various theories and presenting survey data on the phenomenon.

Scott Alexander discusses reader comments on his 'Geography of Madness' review, revising views on culture-bound syndromes and exploring various mental health topics.

Scott Alexander argues that a purely biological, apolitical taxonomy of mental disorders is impossible due to ethical and practical considerations that inevitably influence classifications.

Scott Alexander presents survey data showing autogenderphilia is common in both cisgender and transgender populations, challenging existing theories about its relationship to gender identity.

This Adversarial Collaboration Contest entry examines the evidence and debates surrounding transgender children transitioning, covering desistence rates, social transitioning, puberty blockers, and mental health outcomes.

Scott Alexander reports on weak correlations and inconclusive results from the latest SSC survey on optical illusions and visual perception.

Scott Alexander hypothesizes a link between transgender identity, optical illusions, and NMDA receptor function, based on survey data and existing research on schizophrenia and autism.

Scott Alexander discusses how categories are human constructs that should be flexible when it serves a useful purpose, using examples from biology, astronomy, and transgender identity.

Scott Alexander discusses the lack of scientific research on nerds, exploring potential explanations for their distinct traits, including the possible role of testosterone.

Ozy responds to Spandrell's article on sexual deviancy, refuting claims about homosexuality, female paraphilias, and transgender experiences.