Examined moral and conventional transgressions of 36 toddlers aged 24 and 36 months in a session with mothers and a session with mothers and peers. Moral transgressions were more frequent in the peer session, and conventional transgressions were more frequent when children were alone with mothers. (RJC)

Two experiments examined young children's sensitivity to linguistic contexts in which particular function morphemes occur. Results showed that children who did not produce articles in spontaneous speech were able to distinguish between sentences, verbally presented in picture identification tasks, that contained grammatical articles and those that…

Two experiments explored the effect of linguistic input on 18-month-olds' ability to form an abstract categorical representation of support. Infants were habituated to 4 support events (i.e., one object placed on another) and were tested with a novel support and a novel containment event. Infants formed an abstract category of support (i.e.,…

A short-term longitudinal study of the peer-related social interactions of 111 developmentally delayed toddlers and preschool children was carried out. Results suggested the existence of unusually marked deficits in peer interactions. Possible contributing factors were discussed. (Author/RH)

Examined the effect of experience on children's use of video-presented information. Found that after seeing themselves "live" on their family television for 2 weeks, 2-year-olds reliably used a live video presentation of an adult hiding a toy to find the toy in an object-retrieval task. Most also transferred what they learned to a task…

Observed 28 toddlers' reactions to an adult's programed play overtures. Coordinated responses and alternative overtures increased with age. Words were increasingly used to regulate activity between toddler and adult. (RJC)

Expressive-language-delayed (ELD) families were substantially similar to families with normal younger children and different from families with normal older children in their pragmatic interactions. Mothers' mean length of utterance did not differ among the groups. Pragmatic language interactions in the ELD families were determined largely by…

Compared mothers' play with infants with Down syndrome (DSC) and typically developing children (TDC) matched for mental or chronological age. Found that TDC mothers exhibited more object demonstrations with their developmentally younger children, who showed less object play. DSC mothers were more directive and supportive than mothers of younger…

Two experiments used the preferential looking task to assess early word comprehension in 12- to 24-month olds. Results indicated that when target stimuli were named, 12-month olds displayed an increase in target looking for typical--but not atypical--targets, whereas 18- and 24-month olds displayed increases for both. (Author/KB)

Investigated the etiology of several measures of cognitive delay in over 3,000 pairs of 2-year-old twins, focusing on group-differences heritability for general and specific cognitive delays. Concluded that because the genetic and environmental origins of verbal and performance delays in infancy differ, they are better considered separately rather…

Two experiments investigated factors affecting joint visual attention in 12- and 18-month-olds. Findings indicated that parental pointing at objects elicited more episodes of joint visual attention than looking alone. Although infants most reliably followed gestures to targets in front of them, even 12-month-olds followed gestures to targets…

Examined the relation between mothers' perception of their capacity for controlling infant crying and a later measure of compliance with parent requests by toddlers. Found that toddlers of mothers in the low and high illusion of control (overestimating of maternal control) groups were more likely to be highly defiant than were toddlers of mothers…

Parents of 30-month-old children were assessed on measures of affectivity, personality, and behavior. Parents of inhibited children showed lower extraversion, higher avoidance and shyness, and faster drawing times on a task that involved uncertainty than did parents of uninhibited children. (Author/BC)

Investigated in 3 studies whether 2- to 4-year-olds make accurate causal inferences on the basis of patterns of variation and covariation. Found that all three age groups considered information from various patterns of variation and covariation in judgments regarding two objects and activation of a machine. Three- and 4-year-olds used the…

Examines speech samples from six children aged 2 years to 2 years, 5 months, with Mean Lengths of Utterance ranging from 2.93 to 4.14, were examined for evidence of six syntactic categories: determiner, adjective, noun, noun phrase, preposition, and prepositional phrase. (HOD)