The account that word learning starts in earnest during the second year of life, when infants have mastered the disambiguation skills, has recently been challenged by evidence that infants during the first year already know many common words. The preliminary ability to rapidly map and disambiguate linguistic labels was tested in Italian-speaking…

This study investigates the influence of semantic maturation on early lexical development by examining the impact of contextual diversity--known to influence semantic development--on word promotion from receptive to productive vocabularies (i.e., comprehension-expression gap). Study 1 compares the vocabularies of 3685 American-English-speaking…

Everyday activities are replete with contextual cues for infants to exploit in the service of learning words. Nelson's (1985) script theory guided the hypothesis that infants participate in a set of predictable activities over the course of a day that provide them with opportunities to hear unique language functions and forms. Mothers and their…

Statistical learning may be central to lexical and grammatical development. The phonological and distributional properties of words provide probabilistic cues to their grammatical and semantic properties. Infants can capitalize on such probabilistic cues to learn grammatical patterns in listening tasks. However, infants often struggle to learn…

In the world, the manners and paths of motion events take place together, but in language, these features are expressed separately. How do infants learn to process motion events in linguistically appropriate ways? Forty-six English-learning 7- to 9-month-olds were habituated to a motion event in which a character performed both a manner and a…

A precisely controlled automated procedure confirms a developmental decalage: Infants acquiring English link count nouns to object categories well before they link adjectives to properties. Fourteen- and 18-month-olds (n = 48 at each age) extended novel words presented as count nouns based on category membership rather than shared properties. When…

While investigating a novel toy, infants heard a novel label applied to the toy by a speaker seated within the infant's view and attending to the toy (coupled condition) or by a speaker outside the infant's view (decoupled condition). Found that infants registered a link between the label and toy in the coupled but not the decoupled condition. (BC)

Children exhibiting a referential orientation seem more likely to acquire new object names than nonreferentially oriented children. Also, children's selection of words may be influenced by the phonological structure of the words. (Author/RH)

Abilities of 2-, 5-, and 7-year-old children to interpret, judge acceptability of, and produce class extensions were assessed. It was concluded that increasing ability to deal appropriately with class extensions is primarily due to general advances in language acquisition rather than to any development unique to the class-extension word-formation…

Seeks to determine (1) whether 11- and 13-month-old infants directed their eye fixations to the referent of an object word said by the mother, and (2) whether there was a developmental shift in responding to object words at these two ages. Controls were set for response bias, stimulus preference, and maternal cuing. (Author/RH)

Compares two types of semantic development (the acquisition of disappearance words and success-failure words) to performance on two types of cognitive tasks (object-permanence and means-ends tasks) among infants. (HOD)