Spelke'sWhat babies knowdescribes the remarkably sophisticated mental lives of infants through the theoretical framework of core knowledge. To Spelke, young infants possess six independent core domains, two of which allow them to reason about the social world: the core agent and the core social being systems. Critically, Spelke argues that these core systems fail to communicate prior to 10 months, resulting in an inability to understand social goals. In this commentary, I review evidence that, contrary to Spelke's claims, young infants (...) show robust understanding of social goals and intentions, consistent with claims of an early emerging moral core. (shrink)

Whereas Phillips and colleagues argue that knowledge representations are more basic than belief representations, we argue that an accurate analysis of what is fundamental to theory of mind may depend crucially on the context in which mental-state reasoning occurs. Specifically, we call for increased study of the developmental trajectory of mental-state reasoning within socially evaluative contexts.

Grossmann posits that heightened fearfulness in humans evolved to facilitate cooperative caregiving. We argue that three of his claims – that children express more fear than other apes, that they are uniquely responsive to fearful expressions, and that expression and perception of fear are linked with prosocial behaviors – are inconsistent with existing literature or require additional supporting evidence.

Yarkoni's analysis clearly articulates a number of concerns limiting the generalizability and explanatory power of psychological findings, many of which are compounded in infancy research. ManyBabies addresses these concerns via a radically collaborative, large-scale and open approach to research that is grounded in theory-building, committed to diversification, and focused on understanding sources of variation.