It has been argued that children who possess an advanced theory of mind (ToM) are more likely to act prosocially, yet the empirical findings are mixed. To address this issue definitively, a meta-analytic integration of all prior literature that met appropriate inclusion criteria was conducted. In total, 76 studies including 6,432 children between…

Mothers in Argentina, France, Japan, and the United States were observed interacting with their 5- and 13-month-old infants. Maternal speech was classified into expressions concerning affect and information. Mothers in all cultures used both classifications with their infants and spoke to older infants more than younger infants. (BC)