This study examines the extent to which instructions to self-explain vs. "other"-explain a text lead readers to produce different forms of explanations. Natural language processing was used to examine the content and characteristics of the explanations produced as a function of instruction condition. Undergraduate students (n = 146)…

An exploratory study probed the extent to which children rely on category membership to guide their inferences. A total of 60 children, 4 years of age, were shown 20 sets of pictures of various animals, plants, and minerals. Each set consisted of representations of three objects having two salient features: perceptual similarity/dissimilarity and…

The application of the "back-propagation" learning algorithm to the task of determining the right set of features corresponding to the words in an input sentence is described. Features that are specific to particular nouns and verbs, that indicate whether a nominal constituent is singular or plural, definite or indefinite, and that…

A study compares and contrasts a set of English and Spanish prepositions of location in the context of prototype theory. It seeks to establish the prototype concept of each preposition and the degrees of prototypicality by testing for native-speaker choices of examples that illustrate best the most basic use of the preposition. The prepositions…

Forced-choice items, investigating the performance of 80 undergraduates on verbal classification and verbal analogy, were sequentially presented, allowing independent estimates of the accuracy of four principle component processes: inference, application, recognition, and distraction. Within-task performance showed substantial individual variation…

Relational-inference, a process associated with developmental change in performance on classification items, was investigated in two experiments. The accuracy and latency with which 20 subjects at each of 3 age levels (8, 11, and adult) stated relationships among concepts were tested. In experiment 1, 40 triplets of concepts related by a class…

A study investigated whether children expect color similarity to be less important than form similarity in object label extensions. Twenty 2-year-olds and 20 3-year-olds were asked to sort objects similar in either color or form in two different situations: (1) the "No Label" condition where children were asked to help the puppet put objects that…

A study investigated whether very young children use the concept of mutual exclusivity to make an initial link between a word and an object, and whether its use is linked to age or intelligence differences. Three groups of normally-developing children, aged 1 to 3 years, and three groups of older, mildly retarded children with similar levels of…

A study investigated whether young children use sentence accent to mark new information as systematically as they have been shown to handle contrastive stress within naturally-occurring discourse. Data were drawn from the spontaneous conversations of a boy-and-girl twin pair with adults. The twins' speech was coded in carefully-defined categories…

A study investigated children's difficulty in learning color words and attempted to determine whether the difficulty was perceptual, conceptual, or linguistic. The subjects were 24 two-year-olds, half with knowledge of color words and half without, and a similar control group. The experimental subjects were given conceptual and comprehension tasks…

In linguistic analysis of the speech act, the data used to support theoretical conclusions are too often comprised of semantically isolated utterances of the ideal speaker-hearer. In reality, one of the most revealing kinds of data is imperfect data, where the functioning language processes are often unmasked. The study of first language…

Two studies of concept development and categorization among 1-, 2-, and 3-year-old children suggest that concept formation is a socially guided process involving convergence on an adult model. Convergence in labeling is an early strategy for shaping children's category boundaries, while later, more elaborate linguistic means are used to…