Mothers' mental-state references predict individual differences in preschoolers' false-belief (FB) understanding; less is known about the origins of corresponding variation in school-age children. To address this gap, 105 children completed observations with their mothers at child ages 2 and 6, three FB tasks and a verbal comprehension…

Despite a wealth of studies in the field, longitudinal assessments of both the stability and predictive utility of individual differences in preschoolers' understanding of the mind remain scarce. To address these gaps, we applied latent variable analyses to (a) experimental data gathered from a socially diverse sample (N = 101, 60 boys and 41…

Early individual differences in prosocial behaviors are pivotal for children's peer relationships. To investigate the interplay among verbal ability, emotion understanding, and mother-child mutuality as predictors of prosocial behaviors, we observed 102 children at the ages of two, three, and four. All time points included verbal ability and…

Building on an existing latent variable analysis of executive function (EF) in children (N=191, 57% boys and 43% girls) making the transition to school (Hughes et al. (2010), "Developmental Neuropsychology", vol. 35, pp. 20-36), the current study both documented average developmental improvements from 4 to 6 years of age and examined individual…

Early problem behaviors are associated with a variety of cognitive deficits: in verbal ability, executive function (EF) and theory of mind (ToM). Previous studies with different age-groups yield contrasting results: for 2-year-olds, ToM skills appear particularly salient (Hughes & Ensor, 2006), but for 4-year-olds EF appears more important…

Despite much research into individual differences in social understanding among preschoolers, little is known about corresponding individual differences within younger children. Likewise, although studies of preschoolers highlight the importance of mental-state references, other aspects of talk have received less attention. The current study…

This study examined the independence and interplay between cognitive risk factors (poor executive function/emotion understanding) and maternal risk factors (low education/high depression) for preschool problem behaviors, indexed by multi-measure, multi-informant (mother/teacher/ researcher) ratings. A socio-economically diverse sample of 235…

Despite robust associations between children's theory of mind (ToM) and executive function (EF) skills, longitudinal studies examining this association remain scarce. In a socially diverse sample of 122 children (seen at ages 2, 3, and 4), this study examined (a) developmental stability of associations between ToM, EF, verbal ability, and social…

Background: Exposure to harsh parenting and children's skills in "Theory of Mind" (ToM) show independent and interacting associations with problem behaviors at age 2 (Hughes & Ensor, 2006). This study examined whether these age-2 measures also predict age-4 problem behaviors. Method: In a socially diverse sample (N = 120), multi-informant,…

Sibling relationships appear important in fostering young children's growing theory-of-mind skills, but the quality of sibling interactions has rarely been investigated directly in relation to children's mental-state awareness (e.g. as indexed by talk about perceptions, desires, feelings, cognitions, i.e. inner state talk; IST). This study…

Background: Cognitive and family factors are implicated in the origins of behavioural problems, but little is known about their independence or interplay. Methods: We present data from 127 two-year-olds from predominantly disadvantaged families who completed tests of "theory of mind" (ToM), executive function (EF) and verbal ability. Researchers'…