Bjorklund and Kipp (1996) hypothesized that due to selection processes operative during human evolution, females have an inborn advantage over males in the ability to suppress inappropriate responses on tasks in the behavioral and social domains. To test this hypothesis, a meta-analysis was conducted on gender differences on simple delay tasks in…

This study investigated cross-cultural variation in the development of executive functioning (EF) across the preschool period for United States and Chinese children from low and high socioeconomic families using a longitudinal design. Participants included 216 preschool children (n = 125 from the US; n = 91 from Shanghai and Jiangxi, China). On…

Attention-deficit/hyperactivity disorder (ADHD) can be identified in the preschool years, but little is known about the correlates of ADHD symptoms in preschool children. Research to date suggests that factors such as temperament, personality, and neuropsychological functioning may be important in understanding the development of early ADHD…

We examined the associations between 5-year-old children's private speech, behavioural self-regulation, and cognitive abilities. Behavioural self-regulation was assessed using parental and preschool teacher questionnaires. Cognitive abilities (i.e., language, inhibition, planning and fluency, and memory) were assessed with neurocognitive tests,…

This study examined the concurrent and predictive relations between infant attention skills, joint attention, and emotion regulation. Infants' gaze following skills and duration of orienting were assessed at 6 months of age, and collaborative joint attention and emotion regulation skills were assessed at 24 months of age. The results indicated…

During toddlerhood the ability to organise actions for accomplishing goals rapidly increases. The developmental changes in actions and self-process that become part of this motivational system have seldom been studied simultaneously. Fifty-seven toddlers between the ages of 15 and 35 months were observed for two sessions while working on mastery…