The relationship between grammatical and lexical development was compared in 233 English and 233 Italian children aged between 1;6 and 2;6, matched for age, gender, and vocabulary size on the MacArthur Communicative Development Inventories (CDI). Four different measures of Mean Length of Utterance were applied to the three longest utterances…

Relative importance of appearance and potential function in children's object naming was examined. First, 16 children, taught novel names for unfamiliar objects, had to decide whether these applied to items that resembled the training objects in appearance or potential function. Then the name training procedure was revised so that equal emphasis…

Three experiments document that conceptual knowledge influences lexical acquisition in infancy. A novel target object was initially labeled with a novel word. In both yes-no (Experiment 1) and forced-choice (Experiment 2) tasks, 2-year-olds' subsequent extensions were mediated by the conceptual description of the targets. When targets were…

Language development is often slower in preterm children compared with their term peers. We investigated factors associated with vocabulary acquisition at 2 years in a cohort of children born at 28 weeks' gestation or less. For children entered into the United Kingdom Oscillation Study, language development was evaluated by using the…

Purpose: Language and speech are difficult to assess in newly arrived internationally adopted children. The purpose of this study was to determine if assessments completed when toddlers were first adopted could predict language outcomes at age 2. Local norms were used to develop early intervention guidelines that were evaluated against age 2…

The transition from slow to rapid word-learning was examined in a longitudinal study of 18 children. Results revealed that most children evidenced a prolonged period during which rate of acquisition increased, with most of the acquired words being nouns, while those who demonstrated gradual word-learning acquired a balance of nouns and other word…

Assessed 2-year olds' ability to use semantic context to infer meanings of novel nouns and to retain those meanings. Found that children learned majority of novel words; however, they occasionally failed to choose the correct corresponding picture for a novel noun even when they understood the verb; also found a significant retention of newly…

Two studies examined the robustness of vocabulary learning through overhearing by testing 48 2-year-olds in contexts in which a potentially distracting activity was present (Studies 1 and 2) and in which the novel word was embedded in a directive rather than a labeling statement (Study 2). The children were equally good at learning a novel object…

Between their second and fifth years, young children learn approximately 15 new words a day. For every word the child hears, he or she must choose the correct referent out of an infinite set of candidates. An important problem for developmental psychologists is to understand the principles that limit the child's hypotheses about word meanings. A…

Aims to give a thorough analysis of the morphosyntax produced at the outset of multi-word speech, with a classification of free language produced at 2 years by 27 French-speaking children. A classification performed with word sequences reveals surprisingly adult-like sequences of syntactic categories of words. (Author/VWL)

Discusses measures of infants and toddlers developing vocabularies. Suggests that what is needed are norms derived from observations of typically-developing bilingual children, followed up by measures of concurrent and predictive validity. (Author/VWL)

Investigated whether and when children establish various semantic relations between old and new words. Fifty 2-year olds were taught labels for objects previously referred to by an overextended term. Findings are discussed in light of theories of lexical development, particularly with regard to conceptualizations of constraints on the acquisition…

Three studies examined 2-year-olds' ability to learn novel words when overhearing these words used by others. Found that children ages 2.5 years were equally good at learning novel object labels and action verbs when they were overhearers as when they were directly addressed. For younger 2-year-olds, this was true for object labels, but results…

This is a study of the lexical and grammatical abilities of 16 lexically precocious talkers. These children, aged 2;0 were compared to their age-matched peers, 22 typical talkers aged 2;0, and their expressive vocabulary-matched peers, 22 typical talkers aged 2;6. Individual differences in children's lexical knowledge at 2;0 were stable -- evident…

An important source of information about a new word's meaning (and its associated lexical class) is its range of reference: the number of objects to which it is extended. Ninety toddlers (mean age = 37 months) participated in a study to determine whether young children can use this information in word learning. When a novel word was presented with…