Children's exploratory play tracks the discriminability of hypotheses.

Effective curiosity-driven learning requires recognizing that the value of evidence for testing hypotheses depends on what other hypotheses are under consideration. Do we intuitively represent the discriminability of hypotheses? Here we show children alternative hypotheses for the contents of a box and then shake the box (or allow children to shake it themselves) so they can hear the sound of the contents. We find that children are able to compare the evidence they hear with imagined evidence they do not hear but might have heard under alternative hypotheses.

Changing minds: Children's inferences about third party belief revision.

By the age of 5, children explicitly represent that agents can have both true and false beliefs based on epistemic access to information (e.g., Wellman, Cross, & Watson, 2001).

Moral alchemy: How love changes norms.

We discuss a process by which non-moral concerns (that is concerns agreed to be non-moral within a particular cultural context) can take on moral content. We refer to this phenomenon as moral alchemy and suggest that it arises because moral obligations of care entail recursively valuing loved ones' values, thus allowing propositions with no moral weight in themselves to become morally charged. Within this framework, we predict that when people believe a loved one cares about a behavior more than they do themselves, the moral imperative to care about the loved one's interests will raise the value of that behavior, such that people will be more likely to infer that third parties will see the behavior as wrong (Experiment 1) and the behavior itself as more morally important (Experiment 2) than when the same behaviors are considered outside the context of a caring relationship.

"I use it when I see it": The role of development and experience in Deaf and hearing children's understanding of iconic gesture.

Iconicity is prevalent in gesture and in sign languages, yet the degree to which children recognize and leverage iconicity for early language learning is unclear. In Experiment 1 of the current study, we presented sign-naïve 3-, 4- and 5-year-olds (n=87) with iconic shape gestures and no additional scaffolding to ask whether children can spontaneously map iconic gestures to their referents. Four- and five-year-olds, but not three-year-olds, recognized the referents of iconic shape gestures above chance.