Scott discusses how new schizophrenia genetics research confirms that psychiatric conditions combine both 'tradeoff' components (with compensating advantages) and 'failure' components (purely negative), then argues this pattern is common sense for any multifactorial problem.

Scott Alexander discusses a study challenging the idea that childhood abuse lowers IQ, and explores its implications for understanding the effects of child abuse on various outcomes.

Scott Alexander examines a study showing positive effects of early intervention on at-risk children, but questions its policy implications due to high costs.

Scott Alexander examines studies linking parental age to psychiatric disorders in children, revealing that the father's age at first child, not at conception, is the key factor.