Scott examines 'critical windows' in human development, comparing them to AI learning processes and discussing their mysterious nature. Longer summary

Scott Alexander explores the concept of 'critical windows' in human development, using examples from sexuality and food preferences. He compares these to trapped priors in AI learning, suggesting that children's higher learning rates might explain why early experiences have such lasting impacts. However, he notes that this doesn't fully explain the unpredictable nature of preference-changing events, and concludes that while these events seem more common in childhood, they remain largely mysterious. Shorter summary

Scott Alexander investigates the claim that children learn languages faster than adults, finding it partially true but more nuanced than commonly believed. Longer summary

Scott Alexander examines the claim that children learn languages faster than adults, finding it to be partially true but more complex than commonly believed. He explores various aspects of language acquisition, including critical periods for first language learning, age effects on second language learning, and differences in learning rates between children and adults. The post concludes that while children seem to pick up second languages faster than adults, this advantage is not as clear-cut as often thought, and factors like exposure, motivation, and declining learning rates with age play significant roles. Shorter summary

Scott Alexander analyzes a study on lactation fetishes and its critical window theory, using his own survey data to suggest an alternative explanation based on birth order effects. Longer summary

Scott Alexander examines a study by Enquist et al on lactation fetishes, which suggests a critical window theory for fetish development based on exposure during childhood. The study found that lactation fetishists had more younger siblings, seemingly supporting this theory. However, Scott compares this to his own survey data, which shows a similar pattern for intellectual curiosity. He then uses data from the SSC 2019 Survey to test both hypotheses, looking at various fetishes and sibling relationships. The results suggest that having older siblings suppresses fetish formation, rather than younger siblings causing it. This casts doubt on the critical window theory and indicates that birth order effects on openness to experience might better explain the original study's findings. Shorter summary