To examine whether children's acquisition of perspective-marking language supports development in their ability to reason about mental states, we conducted a longitudinal study testing whether proficiency with complement clauses around age 3 explained variance in false-belief reasoning 6 months later. Forty-five English-speaking 2- and 3-year-olds…

Upon witnessing a causal event, do children's gestures encode causal knowledge that (a) does not appear in their linguistic descriptions or (b) conveys the same information as their sentential expressions? The former use of gesture is considered supplementary; the latter is considered reinforcing. Sixty-four English-speaking children aged 2.5-5…

An analysis of sentence grammar is made to show that the ability to produce coherent texts emerges slowly and late in linguistic and cognitive development. (HP)

Compared two-month old's abilities to detect changes in word order for sequences spoken as a well-formed sentence versus two unrelated, but well-formed, sentence fragments. Results suggest that infants are able to remember the order of spoken words when they are embedded within the coherent prosodic structure of a single well-formed sentence. (HTH)

Indicates that object relative (O) clauses are learned after subject relative (S) clauses. Shows that children did not reliably comprehend O-clauses until nine years of age, two years after S-clauses. Suggests the need to attain a level of operational thought before O-clauses can be understood. (RL)

The development of sentence coordination in children using sentences conjoined by "and" was studied to test the adequacy of the transformationally based derivational theory of complexity. Two cross-sectional experiments were conducted using 18 sentence types with children between the ages of three and five. One experiment used an elicited…

In the study reported here, Japanese-speaking children aged 3-6 were confronted with making choices based on conflicting input from speakers who varied in the degree of certainty and the quality of evidence they possessed for their opinions. Certainty and evidentiality are encoded in Japanese both in high-frequency, closed-class, sentence-final…

Results of 3 sentence-interpretation experiments involving 180 preschoolers suggest that very little explicit syntactic knowledge is needed to give children some structural clues to verb meaning. Sentence structure appears to have a meaning of its own that can be applied by analogy to the child's conceptual representation. (SLD)

Three experiments investigated children's typical errors in judging the truth of universally quantified conditional sentences containing "P and not-Q." The error survived on sentences referring to particular things. For second- and fifth-graders, the error survived for nonuniversally quantified conditionals, and for second-graders, the…

A total of 34 children, ages 2 and a half to 6, were presented with sentences for imitation that either violated or honored a prenominal adjective ordering rule, which requires that size adjectives must precede color adjectives. Two response measures were evaluated in terms of these sentence types: latency to begin a sentence imitation and recall…

This article clarifies the position taken in the Greenfield and Smith book (1976), including relation to speech act theory, and elucidates some general theoretical issues in early language development. (Author/NCR)

Research supported in part by a Public Health Service grant from the National Institute of Child Health and Development. (VM)

In order to test the hypothesis that the ability to form verbal concepts would increase with age, a test for verbal concept formation was developed and administered to 668 children between the ages of 4 and 9. By varying sentences that describe nonsense figures, 4 variables were systematically explored. (MS)

A study was undertaken to investigate which of ten constructions are available to children of various ages for expressing conditionality. A modified sentence completion test based on use of the ten constructions was designed, field-tested, and administered individually to 20 students in each of five grades: kindergarten and grades two, four, six,…

This study attempted to explore the possibility of increasing sensitivity to syntactic structure by exposing subjects representing a range of ability to a programed sentence structure module. Students in three ninth grade classes who had completed four weeks of supplementary work with "English Sentence Structure: Programed Exercises" and scored 70…