Mealtime conversations between parents and their 2-year-old children in five cultural contexts.

Children all over the world learn language, yet the contexts in which they do so vary substantially. This variation needs to be systematically quantified to build robust and generalizable theories of language acquisition. We compared communicative interactions between parents and their 2-year-old children ( = 99 families) during mealtime across five cultural settings (Brazil, Ecuador, Argentina, Germany, and Japan) and coded the amount of talk and gestures as well as their conversational embedding (interlocutors, function, and themes).

Insight into toddlers' motivation to help: From social participants to prosocial contributors.

What drives toddlers' helping behavior? And do toddlers' helping motivations change across time? In line with Dahl and Paulus (2019), we propose that initially, toddlers start helping in ongoing chores driven by their interest in social interactions, and, later on, their helping becomes more concern based, or based on a sense of responsibility. To test this assumption, we used a longitudinal approach to examine the role that social interaction plays in toddlers' motivation to help as they grow older. As such, we investigated whether a disruption to an experimenter during a shared chore task affected toddlers' motivations to continue helping at the ages of 18, 21 and 24 months.