Siblings and theory of mind in deaf native signing children

We report a study designed to examine the basis of "theory of mind" (ToM) reasoning in deaf children who are native signers of British Sign Language. The participants were 20 native signers (aged 4-8 years) and their siblings. The children were given a measure of the quality of sibling relations together with a referential communication test concerning physical representations of objects and people. Sibling quality as perceived by siblings predicted children's ToM scores over and above age and referential communication. We conclude that the process of ToM understanding is linked to positive sibling relations that may permit access to knowledge about the inner worlds of beliefs and other mental states.     

Young Children's Theory of Mind Predicts More Sharing With Friends Over Time

Children (predominantly white and middle class) between 3 and 6 years (M = 55.12 months, N = 145 at Time 1, N = 102 at Time 2) participated in the prosocial choice test at two time points approximately 10 months apart. Children could share with strangers, close friends, nonfriends, and in a control, no recipient condition. Children shared more rewards with friends over time. Age interacted with recipient type such that older children had a higher probability of prosocial allocations toward friends and strangers compared to younger children. Theory of mind (ToM) predicted more prosocial allocations to friends over time, and the youngest children with higher ToM scores showed the largest increase in sharing with friends over time.     

Expressive Vocabulary Predicts Nonverbal Executive Function: A 2-year Longitudinal Study of Deaf and Hearing Children

Numerous studies suggest an association between language and executive function (EF), but evidence of a developmental relationship remains inconclusive. Data were collected from 75 deaf/hard-of-hearing (DHH) children and 82 hearing age-matched controls. Children were 6–11 years old at first time of testing and completed a battery of nonverbal EF tasks and a test of expressive vocabulary. These tasks were completed again 2 years later. Both groups improved their scores on all tasks over this period. DHH children performed significantly less well than hearing peers on some EF tasks and the vocabulary test at both time points. Cross-lagged panel models showed that vocabulary at Time 1 predicted change in EF scores for both DHH and hearing children but not the reverse.     

Relations Between False Belief Understanding and Executive Function in Early Childhood: A Meta‐Analysis

The association between executive function (EF) and theory of mind (ToM) has been hotly debated for 20 years. Competing accounts focus on: task demands, conceptual overlap, or functional ties. Findings from this meta‐analytic review of 102 studies (representing 9,994 participants aged 3–6 years) indicate that the moderate association between EF and one key aspect of ToM, false belief understanding (FBU) is: (a) similar for children from different cultures, (b) largely consistent across distinct EF tasks, but varies across different types of false belief task, and (c) is asymmetric in that early individual differences in EF predict later variation in FBU but not vice versa. These findings support a hybrid emergence‐expression account and highlight new directions for research.     

Measuring and Predicting Individual Differences in Executive Functions at 14 Months: A Longitudinal Study

This study of 195 (108 boys) children seen twice during infancy (Time 1: 4.12 months; Time 2: 14.42 months) aimed to investigate the associations between and infant predictors of executive function (EF) at 14 months. Infants showed high levels of compliance with the EF tasks at 14 months. There was little evidence of cohesion among EF tasks but simple response inhibition was related to performance on two other EF tasks. Infant attention (but not parent-rated temperament) at 4 months predicted performance on two of the four EF tasks at 14 months. Results suggest that EF skills build on simpler component skills such as attention and response inhibition.     

Executive functioning and word reading in Hong Kong Chinese children: A 1-year longitudinal perspective

This study examined the bidirectionality between kindergarten children's executive functioning (EF) and word reading across two time points. Participants were 523 Hong Kong Chinese-speaking children (mean age at Time 2 = 64.59 months; 52.9% male) and their parents. At Time 1, children were administered the measures of EF skills: inhibitory control, attention shifting, working memory and Chinese word reading. They were reassessed with these measures at Time 2 one year later. Results from the cross-lagged panel model revealed that, controlling for child age, gender and parental education levels, children's word reading at Time 1 was significantly predictive of their working memory at Time 2, but that the three EF skills at Time 1 were not predictive of word reading at Time 2. These findings underscored the role of early word reading in promoting children's working memory.     

Meta‐Analysis of Theory of Mind and Peer Popularity in the Preschool and Early School Years

It has been argued that children who possess an advanced theory of mind (ToM) are viewed positively by their peers, but the empirical findings are mixed. This meta‐analysis of 20 studies including 2,096 children (aged from 2 years, 8 months to 10 years) revealed a significant overall association (r = .19) indicating that children with higher ToM scores were also more popular in their peer group. The effect did not vary with age. The effect was weaker for boys (r = .12) compared to girls (r = .30). ToM was more strongly associated with popularity (r = .23) than with rejection (r = .13). These findings confirm that ToM development has significant implications for children's peer relationships.     

Sibling and peer victimization in childhood and adolescence

This study examined how victimizations by either a sibling or peer are linked to each other and to mental health in childhood and adolescence. The data were from the National Survey of Children's Exposure to Violence which includes a sample of children aged 3–9 (N = 1,536) and adolescents aged 10–17 (N = 1,523) gathered through telephone interviews. An adult caregiver (usually a parent) provided the information for children while self-reports were employed for adolescents. Fifteen percent of each age group reported victimization by both a sibling and peer. Victimization by a sibling alone was more common in childhood than adolescence. Victimization by a sibling was predictive of peer victimization. Children and adolescents victimized by both a sibling and peer reported the greatest mental distress. This work establishes that for some children and adolescents, victimization at the hands of other juveniles happens both at home and school. Programs should consider the role of siblings and target parents and siblings to encourage the development and maintenance of constructive sibling interactions.     

From Early Relationships to Preacademic Knowledge: A Sociocognitive Developmental Cascade to School Readiness

This study aimed to test a four-wave sequential mediation model linking mother–child attachment to children's school readiness through child executive functioning (EF) and prosociality in toddlerhood and the preschool years. Mother–child attachment security was assessed when children (N = 255) were aged 15 months and 2 years, child EF at age 2, prosocial behavior at age 4, and finally cognitive school readiness in kindergarten (age 6). The results revealed three indirect pathways linking attachment to school readiness: one through EF only, one through prosocial behavior only, and a last pathway involving both EF and prosocial behavior serially. These findings suggest that secure attachment may equip children with both cognitive and social skills that are instrumental to their preparedness for school.     

The Development of Aggression within Sibling Conflict

Sibling physical aggression and parents' and children's responses to such aggression were observed in 40 families when children were approximately 2% and 4% years of age, and two years later when they were 4% and 6%. Aggression occurred in all families, with first-born siblings being more aggressive than second-borns, and second-born siblings being more likely to cry, especially at the first time period. Parents responded to half of their children's aggression, and were more likely to respond if victims had cried. Only when parents intervened did the conflict resolution indicate to the children that physical aggression was not acceptable. Most responses by both parents and child victims were simple commands to stop aggression, and discussion of issues that gave rise to the aggression. Less frequent parent and child responses, such as physical reactions or approval of aggression by parents, and discussions of feelings or rules, or crying by first-born children were related to only the aggression of second-born siblings at Time 1. Furthermore, the only variables that predicted aggression at Time 2 were the levels of aggression that the children exhibited at Time 1, with relatively aggressive first-born children and relatively unaggressive second-born children predicting higher levels of sibling aggression two years later. Results were discussed in terms of family influences in the development of relatively aggressive or unaggressive sibling relationships over time.     

Cognitive Stimulation as a Mechanism Linking Socioeconomic Status With Executive Function: A Longitudinal Investigation

Executive functions (EF), including working memory, inhibition, and cognitive flexibility, vary as a function of socioeconomic status (SES), with children from economically disadvantaged backgrounds having poorer performance than their higher SES peers. Using observational methods, we investigated cognitive stimulation in the home as a mechanism linking SES with EF. In a sample of 101 children aged 60–75 months, cognitive stimulation fully mediated SES-related differences in EF. Critically, cognitive stimulation was positively associated with the development of inhibition and cognitive flexibility across an 18-month follow-up period. Furthermore, EF at T1 explained SES-related differences in academic achievement at T2. Early cognitive stimulation—a modifiable factor—may be a desirable target for interventions designed to ameliorate SES-related differences in cognitive development and academic achievement.     

The Development of Aggression within Sibling Conflict

Sibling physical aggression and parents' and children's responses to such aggression were observed in 40 families when children were approximately 2% and 4% years of age, and two years later when they were 4% and 6%. Aggression occurred in all families, with first-born siblings being more aggressive than second-borns, and second-born siblings being more likely to cry, especially at the first time period. Parents responded to half of their children's aggression, and were more likely to respond if victims had cried. Only when parents intervened did the conflict resolution indicate to the children that physical aggression was not acceptable. Most responses by both parents and child victims were simple commands to stop aggression, and discussion of issues that gave rise to the aggression. Less frequent parent and child responses, such as physical reactions or approval of aggression by parents, and discussions of feelings or rules, or crying by first-born children were related to only the aggression of second-born siblings at Time 1. Furthermore, the only variables that predicted aggression at Time 2 were the levels of aggression that the children exhibited at Time 1, with relatively aggressive first-born children and relatively unaggressive second-born children predicting higher levels of sibling aggression two years later. Results were discussed in terms of family influences in the development of relatively aggressive or unaggressive sibling relationships over time.     

Individual Differences in Sibling Teaching in Early and Middle Childhood

Research Findings: Sibling teaching and learning behaviors were investigated in 2 studies of children in early and middle childhood. Study 1 addressed individual differences in teaching/learning and associations with dyadic age, age gap, gender, birth order, and relationship quality in 71 middle-class dyads (firstborns M age = 81.54 months; second-borns M age = 56.27 months). Half of the firstborn and half of the second-born siblings were assigned the role of teacher. Regression analyses indicated that dyadic age and age gap made unique contributions to teacher and learner behavior. Few birth order differences in approaches to teaching/learning were revealed. Findings highlight the reciprocal nature of sibling teaching and learning. Study 2 investigated longitudinal associations between sibling relationship quality and teaching in a second sample (at Time 1 firstborns = 46.8 months; second-borns = 14 months). Positive sibling interaction (including play) at Time 1 was associated with teaching/learning behaviors 4 years later. Practice or Policy: Findings are discussed in light of recent social constructivist notions that children's development is facilitated in the context of intimate relationships.     

The Effect of Executive Function on Biological Reasoning in Young Children: An Individual Differences Study

There is substantial variance in the age at which children construct and deploy their first explicit theory of biology. This study tests the hypothesis that this variance is due, at least in part, to individual differences in their executive function (EF) abilities. A group of 79 boys and girls aged 5–7 years (with a mean age of 6½ years) were presented with two test batteries: (a) a biology battery that probed their understanding of life, death, and body functions and (b) an EF battery that tested working memory, inhibition, and set‐shifting skills. Individuals' EF scores significantly predict their biology scores, even after controlling for age and verbal IQ.     

Do siblings influence one another? Unpacking processes that occur during sibling conflict

This study examined the extent to which 205 sibling dyads influenced each other during conflict. Data were collected between 2013 to 2015. The sample included 5.9% Black, 15.1% South Asian, 15.1% East Asian, and 63.8% White children. Older siblings were between 7–13 years old (Female = 109) and younger siblings were 5–9 years old (Female = 99). Siblings' conflict resolution was analyzed using dynamic structural equation modeling. Modeling fluctuations in moment-to-moment data (20-s intervals) allowed for a close approximation of causal influence. Older and younger siblings were found to influence one another. Younger sisters were more constructive than younger brothers, especially in sister–sister dyads. Sibling age gap predicted inertia in older siblings. Socialization processes within sibling relationships are discussed.     

Night Awakening and Its Association With Executive Functioning Across the First Two Years of Life

Longitudinal associations between signaled night awakening and executive functioning (EF) at 8 and 24 months in children with (≥ 3 awakenings, n = 77) and without parent-rated fragmented sleep (≤ 1 awakening, n = 69) were studied. EF was assessed with the Switch task at 8 and 24 months. At 24 months, behavioral tasks and parental ratings of EF (Behavior Rating Inventory of Executive Function–Preschool version) were also used. In the Switch task, children with fragmented sleep were less able to learn stimulus sequences and inhibit previously learned responses than children without fragmented sleep. The groups differed only marginally in parental ratings of EF, and no differences were found in behavioral EF tasks. These results suggest that eye movement-based measures may reveal associations between sleep and EF already in infancy and toddlerhood.     

Early Attachment Relationships as Predictors of Preschool Children's Emotion Regulation with a Distressed Sibling

The present study examined (1) the emotion regulation of preschool children by observing their emotional responses to a distressed younger sibling during a separation episode; (2) whether children's regulatory responses were related to sibling interaction observed during the separation episode, and (3) whether individual differences in these children's regulatory responses and the quality of sibling interaction could be predicted from early attachment relationships. Older siblings who ignored their younger siblings' distress were more likely to experience personal distress and use avoidant coping strategies. Emotion regulation strategies were related to the quality of sibling interaction such that older siblings who offered comfort to a distressed younger sibling were more likely to express positive affect in sibling interaction, whereas older siblings seeking adult assistance were less likely to engage in conflict and hostile behavior with a younger sibling. Preschool children who had an insecure-resistant infant-mother attachment at 1 year, were more likely to seek comfort from their younger siblings and engaged in more sibling conflict and hostility when they were 4 years old. The quality of infant-father attachment relationships was not significantly related to the child's emotion regulation at 4 years of age. Results are discussed with respect to the social origins of preschool children's emotional self-regulation and the consequences of emotional dysregulation in preschool settings.     

Early Attachment Relationships as Predictors of Preschool Children's Emotion Regulation with a Distressed Sibling

The present study examined (1) the emotion regulation of preschool children by observing their emotional responses to a distressed younger sibling during a separation episode; (2) whether children's regulatory responses were related to sibling interaction observed during the separation episode, and (3) whether individual differences in these children's regulatory responses and the quality of sibling interaction could be predicted from early attachment relationships. Older siblings who ignored their younger siblings' distress were more likely to experience personal distress and use avoidant coping strategies. Emotion regulation strategies were related to the quality of sibling interaction such that older siblings who offered comfort to a distressed younger sibling were more likely to express positive affect in sibling interaction, whereas older siblings seeking adult assistance were less likely to engage in conflict and hostile behavior with a younger sibling. Preschool children who had an insecure-resistant infant-mother attachment at 1 year, were more likely to seek comfort from their younger siblings and engaged in more sibling conflict and hostility when they were 4 years old. The quality of infant-father attachment relationships was not significantly related to the child's emotion regulation at 4 years of age. Results are discussed with respect to the social origins of preschool children's emotional self-regulation and the consequences of emotional dysregulation in preschool settings.     

Peer Network Overlap in Twin,Sibling, and Friend Dyads

Research suggests that sibling–peer connections are important for understanding adolescent problem behaviors. Using a novel behavioral genetic design, the current study investigated peer network overlap in 300 child–child pairs (aged 7–13 years) in 5 dyad types: monozygotic (MZ), dizygotic twins, full siblings (FSs), friend pairs, and virtual twins (i.e., same‐aged, genetically unrelated siblings). Genetic relatedness, sex composition, and age differences contributed to peer overlap in sibling dyads. MZ twins showed the highest overlap (82%), opposite‐sex FS pairs showed the lowest overlap (27%), and friend pairs (48%) were close to the mean (53%). Social contact variables and self‐reported relationship intimacy predicted additional variance in peer overlap. The roles of genotype–environment correlational and shared environmental processes in the sibling–peer connections are discussed.     

Individual Differences in Children's Corepresentation of Self and Other in Joint Action

Previous research has shown that children aged 4–5 years, but not 2–3 years, show adult‐like interference from a partner when performing a joint task (Milward, Kita, & Apperly, 2014). This raises questions about the cognitive skills involved in the development of such “corepresentation (CR)” of a partner (Sebanz, Knoblich, & Prinz, 2003). Here, individual differences data from one hundred and thirteen 4‐ to 5‐year‐olds showed theory of mind (ToM) and inhibitory control (IC) as predictors of ability to avoid CR interference, suggesting that children with better ToM abilities are more likely to succeed in decoupling self and other representations in a joint task, while better IC is likely to help children avoid interference from a partner's response when selecting their own response on the task.