This article reviews two aspects of human learning: (1) people draw inferences that appear to rely on hierarchical conceptual representations; (2) some categories are much easier to learn than others given the same number of exemplars, and some categories remain difficult despite extensive training. Both of these results are difficult to reconcile…

Humans are sensitive to the properties of individual items, and exemplar models are useful for capturing this sensitivity. I am a proponent of an extension of exemplar-based architectures that I briefly describe. However, exemplar models are very shallow architectures in which it is necessary to stipulate a set of primitive elements that make up…

Ambridge argues that the existence of exemplar models for individual phenomena (words, inflection rules, etc.) suggests the feasibility of a unified, exemplars-everywhere model that eschews abstraction. The argument would be strengthened by a description of such a model. However, none is provided. I show that any attempt to do so would immediately…

Ambridge argues that there is widespread agreement among child language researchers that learners store linguistic abstractions. In this commentary the authors first argue that this assumption is incorrect; anti-representationalist/exemplar views are pervasive in theories of child language. Next, the authors outline what has been learned from this…

Early childhood learning of language has led some to postulate innate knowledge of an abstract symbolic linguistic system. However, if the child's abstract understanding initially requires concrete support in the form of agreement of the message with his nonlinguistic experience, the indication would be that the development of syntactic…

Assuming that an infant's first stage of verbal communication is melodic and the result of controlling the motion of the vocal cords, a question arises concerning the second stage in development. Is it the shaping of the oral cavity of the direction of the articulators? The author's observation of an infant through his first year of development…

In this research monograph, several areas of disparity between child and adult grammar are examined to discover at what ages the child, who is on the border of adult language competence, achieves a certain mastery of complex syntactic structures. Chapters include (1) a discussion of current notions on the nature of the linguistic process and a…

Recall lists were presented to 40 black lower class and 40 white middle class children in this experiment. The purpose of the study was to examine a possible explanation of the relatively poor performance of black and lower class children on tasks requiring abstract learning abilities. It was reasoned that the threshold for the production of…

After intensively studying for several years the thinking processes of members of a tribal group in Western Africa, the Kpelle, the authors examine the relation between culture and cognitive development. The following issues are discussed: (1) an analysis of the terms "culture" and "cognition"; (2) an ethnographic description of the Kpelle…