This study investigated 2-year-olds' understanding of others' intentions in a social learning context. After seeing a demonstration of how to open a box, children in two "No Prior Intention" conditions were less likely than those in "Prior Intention" conditions to open the box themselves when the adult unsuccessfully tried to open it. Results…

Analyzed three main types of English dative constructions--the double-object dative, the "to" dative, and the "for" dative--in the spontaneous speech of seven children aged 1.6-5 years. Results provide a starting point for determining the underlying representations for the different kinds of dative constructions and for explicating how children…

Chimpanzees ("Pan troglodytes") and bonobos ("Pan paniscus") (Study 1) and 18- and 24-month-old human children (Study 2) participated in a novel communicative task. A human experimenter (E) hid food or a toy in one of two opaque containers before gesturing towards the reward's location in one of two ways. In the Informing condition, she attempted…

Four word-learning studies exposed 2-year olds to novel verbs and nouns. Found that knowledge of what action or object was impending was not necessary for learning the words; children learned a novel verb for an intentional but not an accidental action; and children learned a novel noun for an object being sought, but not ones rejected while…

We argue for the importance of processes of shared intentionality in children's early cognitive development. We look briefly at four important social-cognitive skills and how they are transformed by shared intentionality. In each case, we look first at a kind of individualistic version of the skill--as exemplified most clearly in the behavior of…

Four studies examined 2- and 3-year olds' word order and verb morphology productivity. Findings indicated that younger children neither used nor comprehended word order with novel transitive verbs. Older children comprehended and used word order to mark verbs' agents and patients. Children as young as 25 months added "-ing" but not…

Two studies investigated factors affecting children's (n=48) choice of pronouns as referring expressions. Findings indicate the children (ages 2-3) did not use pronouns differentially when the adult model them or they witnessed a target event, but did use pronouns differently depending on the immediately preceding discourse of the experimenter.…

Twelve- and 18-month-olds played with 2 adults and 2 new toys. For a third toy, one adult left the room while the child and other adult played with it. This adult returned, looked at the 3 toys, expressed excitement, and asked "Can you give it to me?" Infants at both ages were able to do so, suggesting that 1-year-olds understand other persons as…

Eight 20- to 26-month-old children were exposed to 4 novel nouns in a game context over several weeks to determine whether, when, and in what ways the children would use them beyond their original linguistic forms. The majority were productive in their use of the nouns, indicating that the grammatical category for noun is operational by age 2.…

Childers and Tomasello (2001) found that training 2 1/2-year-olds on the English transitive construction greatly improves their performance on a post-test in which they must use novel verbs in that construction. In the current study, we replicated Childers and Tomasello's finding, but using a much lower frequency of transitive verbs and models in…

Examined 2-year-olds' comprehension and production of novel nouns, verbs, or actions at 3 intervals after training conducted in massed or distributed exposures. Found that for comprehension, children learned all item types in all training conditions at all retention intervals. Production was better for nonverbal actions than for either word type…

Tested two hypotheses about how English-speaking children learn to avoid making argument structure errors such as "don't giggle me." Ninety-six children were introduced to two nonce verbs, one as a transitive verb and one as an intransitive verb. Found empirical support for the constraining role of verb classes and preemption, but only for…

The MacArthur Communicative Development Inventories (CDIs) represent a breakthrough in measuring early language production. Nevertheless, the CDIs' word comprehension component may not be a valid measure, because parents report too high a word comprehension ability for their children. Suggests that administering the CDIs to parents in an interview…

This article reports 2 experiments examining the changing role of iconicity in symbol learning and its implications regarding the mechanisms supporting symbol-to-referent mapping. Experiment 1 compared 18- and 26-month-olds' mapping of iconic gestures (e.g., hopping gesture for a rabbit) vs. arbitrary gestures (e.g., dropping motion for a rabbit).…

The focus of the present study was the role of cultural learning in infants' acquisition of pretense actions with objects. In three studies, 18- and 24-month-olds (n= 64) were presented with novel objects, and either pretense or instrumental actions were demonstrated with these. When children were then allowed to act upon the objects themselves,…