It has been argued that infants possess a rich, sophisticated theory of mind that is only revealed with tasks based on spontaneous responses. A mature theory of mind implies the understanding that mental states are person-specific. Previous studies on infants’ understanding of motivational mental states such as goals and preferences have revealed that, by 9 months of age, infants do not generalize these motivational mental states across agents. However, it remains to be determined if infants also perceive epistemic states as (...) person-specific. Therefore, the goal of the present study was to use a switch agent paradigm with the classic false belief violation-of-expectation task. Results revealed that 16-month-old infants attributed true and false beliefs to a naïve agent—they did not perceive beliefs as person-specific. These findings indicate that infants’ understanding of beliefs is not as sophisticated as the rich mentalistic view suggests. (shrink)

In the target article, Clark and Fischer argue that little is known about children's perceptions of social robots. By reviewing the existing literature we demonstrate that infants and young children interact with robots in the same ways they do with other social agents. Importantly, we conclude children's understanding that robots are artifacts (e.g., not alive) develops gradually during the preschool years.

Müller attempts to downplay cases of dissociation between language and cognition as evidence against the modularity of language. We review cases of associations between verbal and nonverbal abilities as further evidence against the notion of language as an autonomous subsystem. We also point out a discrepancy between his proposal of homologies between nonhuman primates' communication and human language and recent proposals on the evolution of language.

Early childhood is characterized by many cognitive developmentalists as a period of considerable change with respect to representational format. Dienes & Perner present a potentially viable theory for the stages involved in the increasingly explicit representation of knowledge. However, in our view they fail to map their multi-level system of explicitness onto cognitive developmental changes that occur in the first years of life. Specifically, we question the theory's heuristic value when applied to the development of early mind reading and categorization. (...) We conclude that the authors fail to present evidence that dispels the view that knowledge change in these areas is dichotomous. (shrink)

Tomasello et al. have presented a position that is grounded in a conservative perspective of cultural learning, as well as in a rich interpretation of recent findings in early social cognition. Although I applaud their theoretical framework, I argue that data from studies of human infants are not necessarily consistent with the developmental picture that they describe.

Carey proposes a theory of conceptual development that specifies innate conceptual representations that get learning started. Those representations are the output of innate domain-specific input analyzers. I contend that innate core cognition about agency is itself a gradual construction and that the role of Quinian bootstrapping needs elaboration to account for the development of intuitive theories of psychology.