Forming conceptually-rich social categories helps people to navigate the complex social
world by allowing them to reason about the likely thoughts, beliefs, actions, and interactions …

Importance Cerebral palsy (CP) is the most common childhood physical disability. Early
intervention for children younger than 2 years with or at risk of CP is critical. Now that an …

It is widely believed that the demands of living in large, complexly bonded social groups
played a key role in the evolution of human cognition. This review focuses on a critical but …

Although psychologists have paid scant attention to the sense of obligation as a distinctly
human motivation, moral philosophers have identified two of its key features: First, it has a …

Selecting appropriate foods is a complex and evolutionarily ancient problem, yet past
studies have revealed little evidence of adaptations present in infancy that support …

To successfully navigate their social world, humans need to understand and map enduring
relationships between people: Humans need a concept of social affiliation. Here I propose …

Across human societies, people form “thick” relationships characterized by strong
attachments, obligations, and mutual responsiveness. People in thick relationships share …

Imitation is ubiquitous in positive social interactions. For adult and child observers, it also
supports inferences about the participants in such interactions and their social relationships …

Infants are born into networks of individuals who are socially connected. How do infants
begin learning which individuals are their own potential social partners? Using digitally …

Many rituals are socially stipulated such that engaging in a group's rituals can fundamentally
signal membership in that group. Here, we asked whether infants infer information about …