Used observations and interview of mothers and children to test a mediational model in which committed compliance and opposition influence the child's emerging view of self on moral dimensions and this "moral self" regulates moral conduct. Found that the model, involving committed compliance and opposition in the "don't" demand context, was…

Systematically varied the day-night task requiring children to say "night" to a sun picture and "day" to a moon picture to investigate why young children typically fail the task. Found that reducing memory load did not help performance. Reducing inhibitory demand by requiring an unrelated response or inserting a delay between stimulus and response…

Examined in two studies the moderating effect of perceptual load on visual selective attention. Found that children's performance was as efficient as adults' under conditions of high but not low loads, suggesting that early selection engages rapidly maturing neural systems and late selection engages later-maturing systems. The onset of early…

Developed and tested the psychometric properties of the 38-item Self Description Questionnaire for Preschoolers. Found that the scale was reliable for young children, first-order and higher order confirmatory factor analysis models fit the data, and factor correlations were mostly moderate. Achievement test scores correlated moderately with…

Investigated bilingual 6- to 10-year-olds' reasoning about the stability of human psychological characteristics in relation to the obligatory distinction between the Spanish verb forms "ser" and "estar" and the corresponding English form "to be." Found that children treated "ser" and "to be" as more likely than "estar" to convey the stability of…

Two experiments replicated Flavell et al.'s (1978) finding that 2.5-year-olds can hide an object behind a screen but cannot achieve the same result placing the screen in front. Move-screen performance related to judgment of what a person in a picture was looking at. Move-object task remained easier than the move-screen task even with an…

Investigated whether source-monitoring training would decrease 3- to 4-year-olds' suggestibility. After observing live or video target-events, children received source-monitoring or recognition (control) training. Found that children given source-monitoring training were more accurate than control group children in response to misleading and…

Examined gaze aversion in 5- and 8-year-olds when answering verbal reasoning and arithmetic questions of varying difficulty. Found that older children increase gaze aversion from the face of the adult questioner in response to both verbal and arithmetic difficult questions. Young children responded less consistently to cognitive difficulty.…

This longitudinal study identified subgroups of rejected boys with different developmental pathways of aggression and prosocial behavior during middle childhood. Four subgroups were identified associated with different patterns of sociometric acceptance and rejection over time and with social emotional adjustment in the last measurement wave.…

This study examined the relationship between deviant friendships and substance use from early adolescence (age 13-14) to young adulthood (age 22-23). Multivariate modeling revealed that substance use in young adulthood is a joint outcome of friendship influences and selection processes. Substance use appears to affect friend selection in late…

This study investigated the role of context in mothers' interventions in their preschoolers' peer relationship problems. In response to a series of videotaped vignettes depicting common peer relationship problems, mothers suggested using more discussion in aggressive situations and more encouragement in initiating play situations. Mothers would…

Three experiments tested 3- and 4-year-olds' use of abstract principles to classify and label objects by shape or function. Findings indicated that 4-year-olds readily adopted either rule when instructed to match objects by shape or function, but 3-year-olds followed only the shape rule. Without a rule, 4-year-olds tended to match by shape unless…

Examined gender differences in 514 children's competence and value beliefs from first through twelfth grade, and the relation of these trends to initial differences in parents' perceptions of children's ability. Found that gender differences in competence and value beliefs related to sports and mathematics. Gender differences in competence beliefs…

Examined associations among mothers' insightfulness into their 12-month-olds' internal experience as assessed through interviews regarding mothers' videotaped interaction with their infant, mothers' sensitivity to infant's signals during laboratory and home play sessions, and infant's security of attachment to mothers in the Strange Situation.…

Examined cognitive profile and multiple-deficit hypothesis in Chinese developmental dyslexia. Compared 30 Chinese dyslexic children with average readers of the same chronological age (CA) and 30 average readers at the same reading level (RL) in several rapid naming, visual, phonological, and orthographic tasks. Found that dyslexic children…