The ability to categorize emotions has long-term implications for children's social and emotional development. Therefore, identifying factors that influence early emotion categorization is of great importance. Yet, whether and how language impacts emotion category development is still widely debated. The present study aimed to assess how labels…

Despite receiving scant attention, the evolution of categorization in early childhood is of central importance, not only in clarifying the child's understanding of the world but in terms of refining cognitive organization and augmenting the development of semantic memory. In this review, we outline how categorization develops and is made manifest…

Questioning others is one of the most powerful methods that children use to learn about the world. How does questioning develop? How is it socialized? And how can questioning be leveraged to support learning and education? In this volume, some of the world's leading experts are brought together to explore critical issues in the development of…

Organized semantic representations encoding across- and within-domain distinctions are a hallmark of mature cognition, and understanding how they change with experience and learning is a key endeavor in developmental science. Existing computational modeling studies provide a mechanistic framework for understanding how structured semantic…

Errors differ in degree of seriousness. We asked whether preschoolers would use the magnitude of an informant's errors to decide if that informant would be a good source of information later. Four- and 5-year-olds observed two informants incorrectly label familiar objects, but one informant's errors were closer to the correct answer than the…

An extensive body of research claims that labels facilitate categorisation, highlight the commonalities between objects and act as invitations to form categories for young infants before their first birthday. While this may indeed be a reasonable claim, we argue that it is not justified by the experiments described in the research. We report on a…

Changes in children's categorization behavior between 15 and 21 months of age and the relation of these changes to developments in language, object permanence, and means-end understanding are reported. (PCB)

Three studies examined lexical categorization in 2-year- olds. Findings indicated that even with minimal opportunities to familiarize themselves with novel artifacts, children generalized their names in accordance with the objects' functions, even when they had to discover the functions on their own or when all the test objects had some…

Acquisition of the novel name-nameless category (N3C) principle by 22 toddlers with Down syndrome was studied. Results indicated that the ability to fast map a new word to a category is not available at the start of lexical acquisition. Children who used the N3C principle had larger productive vocabularies than others and had begun to acquire new…

Six match-to-sample picture/object selection experiments explored 3- to 5-year-olds' knowledge about superordinate words and acquisition of this knowledge. Findings indicated that number of standards (one versus two), types of standards (different versus same basic-level categories), and nature of representation (pictures versus objects)…

Subjects in grades 2, 6, and college were asked to sort 50 pictures according to several class labels, each with a functional equivalent. (ST)

Four experiments with 36 infants studied how children organize objects categorically in the absence of input. Outcomes were not consistent with the predictions of bias accounts and considerably weaken the case for a psychologically real noun-bias prior to the vocabulary explosion. Findings are more consistent with children's use of information as…

This study examined how novel words foster the formation of object categories for 12- to 13-month olds. Results indicated that by 12 to 13 months, infants have begun to distinguish between novel words presented as count nouns versus adjectives in fluent, infant-directed speech, and that infants' expectations for novel words accord with this…

Examined preschoolers' ability to map novel adjectives to object properties in two experiments. Found that 4-year-olds could extend novel adjectives from target to matching test object whether objects were drawn from same, or different, basic level categories. If 3-year-olds' first extended a novel adjective to objects in the same basic level…

Preliminary evidence indicates that children begin to generalize knowledge in a new way at approximately 3 years of age. Forty children between 1.5 and 3.5 years of age were given two tasks of graded complexity. The first and simpler task used four nonoverlapping classes, each composed of four identical objects. Two of the classes were tagged with…