A study was conducted to investigate age changes in children's noncompliant and resistant behaviors and their relation to parental control strategies during the toddler period. Specifically, the study explored possible changes in the form of children's oppositional behavior (or "negativism") and investigated how parental control…

Two experiments tested children's ability to imagine a pretend action and select a representation of its outcome. Found that children two years and older could select the correct representation, whether represented by a picture or toy; younger children could not select representations of actual or pretend transformations. Results had implications…

Investigates the development of an understanding of gender labels in toddlers by systematically varying the ages of pictured stimulus children. Results indicate that gender discrimination improved with age, but there was no evidence that the age of the stimulus children had an influence on labeling accuracy. (JS)

Results suggest that the most adaptive course of action for children may be to be responsive to environmental demands and interpersonal constraints. In the study, the patterns of compliance of 31 children of 18 months, 32 children of 24 months, and 36 children of 30 months, and their mothers and fathers were observed in five situations. (RH)

Seven experiments tested 18- to 36-month-old children's understanding of adult pretense. Results indicated that children understood when adults referred to make-believe substances or made make-believe substitutions; appropriately directed their pretend actions; understood the causal consequences of imaginary actions; produced suitable remedial…

Studied 2-year olds' understanding of pretense expressions of independent agency in scenarios in which a doll acted as the agent of a series of pretend events. Found no gender differences in the doll's imaginary intentions, but older toddlers performed reliably better than younger. Episodes requiring enacting conclusions to events that began with…

Four experiments assessed infants' ability to solve isomorphic problems and explored the nature of early representations. Found that 13-month-olds transferred a modeled strategy across isomorphic problems, whereas 10-month-olds transferred only after multiple source problems or high perceptual similarity between problems. Comprehension of the…

Examined in 4 experiments 2-year-olds' knowledge of solidity in search tasks. Found no evidence that 2-year-olds represented solidity and support constraints on trajectories of falling objects; two experiments included 2.5-year-olds who succeeded on search tasks. Explored implications of 2-year-olds' poor performance in light of very young…

Symptoms of Autism Spectrum Disorders (ASD) begin to manifest during the first 2 years; there is limited evidence regarding type and timing of symptom onset. We examined factors related to parental age of recognition (AOR) of early abnormalities and the association between AOR and diagnosis and levels of functioning at 2 and 4 years in 75 toddlers…

Walkers fall frequently, especially during infancy. Children (15, 21, 27, 33, and 39 month-olds) and adults were tested in a novel foam pit paradigm to examine age-related changes in the relationship between falling and prospective control of locomotion. In trial 1, participants walked and fell into a deformable foam pit marked with distinct…

Three studies examined the abstractness of children's mental representation of counting, and their understanding of the cardinality principle, namely, that the last number word used in a count tells how many items there are. In the first experiment, 24 toddlers of 2-3 years counted objects, actions, and sounds. Findings revealed that children…

Recent work suggests that the apparent shift from thematic to taxonomic concept organization reflects changes in children's preference for these forms of organization, rather than their capacity. A study was made to assess toddlers' knowledge of the different possible relations for the same concept and to extend the triad method to children under…

In order to examine the development of social pretend skills in the toddler period, social pretend play was observed in same and mixed age dyads. More complex social pretend play was expected in the mixed age than in the same age condition. A second purpose of the study was to compare 5-year-old children's attempts to communicate pretend meanings…

A study of the late acquisition of the passive in Zulu used data from transcripts of naturalistic speech gathered in a longitudinal study of several children's speech development between 1.10 and 3.6 years of age. It was hypothesized that the productivity of the passive construction in Zulu is a factor facilitating acquisition. A range of…

This study determines whether children who see an object hidden in a location in one space can retrieve an analogous object hidden in an analogous location in a different space. Participants were 16 31-months-old and 16 38-months-old children. After a familiarization experience, half the children observed a stuffed dog hidden in a room, tried to…