Children's ability to learn aspects of their language in the absence of supportive evidence is discussed. Specifically, the learnability of null subjects in languages in which they appear is examined when indirect negative evidence is present. It is concluded that parameters such as the null subject parameter may not generate languages, strictly…

A study looks at young children's responses to tough movement structures, focusing on complements to "easy." The study examines the development of the two major types of rule usage: primitive and adult, and focuses on the inconsistent fluctuations between the primitive and adult levels. It is proposed that the source of complexity in…

Outside the core grammar, the set of "peripheral" or marked properties of a language include exceptions or relaxations of the settings of core grammar and the idiosyncratic features of the language governed by particular lexical items. The core/peripheral distinction has direct implications for grammatical development in children. The…

A study of children's acquisition of the auxiliary verb system in English is reported. The first section describes the operation of the auxiliary system, and proposes that the behavior of auxiliaries is so complicated that if children were to generalize from one auxiliary to another, they would make predictable errors. The second section reviews…

Based on a study of 50 children between the ages of 3;0 and 5;6, the reasons for the differential difficulty of various forms of "who,""why,""when," and "how" questions are postulated. (EJS)

Starting with a model for explaining comprehension and noncomprehension of verbal material in terms of a match/mismatch principle, this project developed a scale of language usage and explored hypotheses about how comprehension may become possible if a child does not now comprehend some particular oral or written text. Eight separate reports are…

This study investigated the quantitative and qualitative differences in the responses of children aged four, six, and eight to four kinds of questions; cognitive memory, convergent, divergent, and evaluative. The subjects, 48 boys and girls, were from advantaged homes and had attended, or were attending, nursery school. Each subject was shown a…

Reports an experimental investigation of the influence of linguistic factors on linguistic performance. The factors studied were interpretive complexity and surface length. Results show an interaction between types of linguistic complexity and type of linguistic performance. (Author/SED)

A discussion of language acquisition assumes that lexicon plays a central role, and that the principles of conventionality and contrast are also essential. It examines the hypotheses children draw on about possible word meanings and how they map their meanings into forms. This process begins with children's emerging knowledge of conventional words…

This report is a cross-linguistic study that compares the sequence of emergence of semantic relations in English with the sequence of emergence of these relations in the acquisition of American Sign Language. American Sign Language (ASL) differs from English in modality (it is a visual-gesture language rather than an auditory-vocal one) and in the…