We investigate the hypothesis that our conceptual systems provide two formally distinct ways of representing categories by investigating the manner in which lexical nominals (e.g., "tree," "picnic table") and phrasal nominals (e.g., "black bird," "birds that like rice") are interpreted. Four experiments found that lexical nominals may be mapped…

Evidentials are grammatical elements such as affixes and particles indicating the source of knowledge. We provide an overview of this grammatical category and consider three research domains to which developmental studies on evidentiality contribute: the acquisition of linguistic means to characterize knowledge, the conceptual understanding of…

This paper reports a study carried out with 14 children (ranging in age from 2.8 to 3.5 years) which investigated children's concepts of difference. Pairs of small objects differing on a number of dimensions were presented to the children. As each pair of objects was presented, children were asked to select the object that was…

In three experiments, a multiple habituation paradigm was used to examine the ability of 7- and 9-month-old prelinguistic infants to form a natural, basic-level object category. Findings constitute independent evidence for the existence of a linguistically relevant nonlinguistic category prior to the onset of word comprehension. (SED)

Describes an experiment to see whether the words "front" and "back" introduce the concept of "front-back" or whether the concept preceded the words. Results show that (1) a complex disjunctive concept of "front-back" orientation precedes any knowledge of the words; (2) linguistically, "back" is comprehended before "front"; and (3) children at an…

Two transitional phases in the child's early language development are described; the first occurs between prelinguistic vocalization and one-word speech and the second between one-word and patterned speech. Cognitive, linguistic and affective inputs to the acquisition of reference and syntax are discussed in the light of the transitional…

Discusses children's acquisition of non-nominal, abstract words and argues that the use of these words parallels the child's cognitive development in trial-and-error problem solving and in development of insight. (EKN)

A study involving 65 children from 5.6 to 9.5 years of age suggested that the average child's ability to differentiate spoken words from other units of speech improves with age and that significant relationships exist between children's knowledge of spoken words and their reading achievement. (GT)

A case study of the period of repetitive babbling in one Dutch infant is reported. Repetitive babbling is seen as a systematic and continuous process, during which the child is applying certain strategies in order to form concepts concerning the possibilities of his or her articulatory apparatus. Strategies identified are: (1) variation…

Three extrinsic factors were manipulated in a problem-solving task performed by 80 ten-year-old children of I Q 90-110. The factors were: the presence or absence of the name of the concept given in feedback, specific instructions, and whether the child was allowed to verbalize. The task was a modification of Vygotsky's experiment on concept…

Preschool children were required to act out a series of two-event sequences conjoined by either "before" or "after." Performance was markedly superior for meaningfully ordered sequences than for arbitrarily ordered sequences. It is suggested that the meanings of "before" and "after" must be acquired in situations which provide contextual support.…

In retelling 20 stories, 23 nursery-school children often refused to produce sentences in which causation was stated directly, but readily retold causation-implied utterances. Other results are discussed. (Author/RM)

This study examined the effects of certain contextual linguistic variables on the logical performance of subjects in grades 4, 6, and 12 of selected British Columbia schools as well as some theoretical problems underlying assessment of the development of logical abilities. The task consisted of 27 syllogistic problems based upon the information…

Discussed are some issues and queries about research in language and language acquisition. In particular, the area of inquiry is the logic subjacent to communication. In question here are the foundations of communication. What, if anything, underlies language? The unorthodox position developed in this paper has ambitious assumptions and slim…

Mean ratings for the 487 words, rated on eight semantic differential rating scales and factor scores for fifth-grade children are included, together with emotionality, imagery, and concreteness ratings by college subjects. (Author)