RESUMEN
UNLABELLED: Teleological reasoning involves the assumption that entities exist for a purpose (giraffes have long necks for reaching leaves). This study examines how teleological reasoning relates to cultural context, by studying teleological reasoning in 61 Quechua-speaking Peruvian preschoolers (Mage = 5.3 years) and adults in an indigenous community, compared to 72 English-speaking U.S. preschoolers (Mage = 4.9 years) and university students. Data were responses to open-ended "why" questions ("Why is that mountain tall?"). Teleological explanations about nonliving natural kinds were more frequent for children than adults, and for Quechua than U.S. PARTICIPANTS: However, changes with age were importantly distinct from differences corresponding to cultural variation. Developmental and cultural differences in teleological explanations may reflect causal analysis of the features under consideration.