Biomedical subjects

Mara Brendgen

Publications and source records attributed to Mara Brendgen.

15 recordsLinked to original sources

PubMed2007

"Accept me, or else...": disputed overestimation of social competence predicts increases in proactive aggression.

It has been proposed that aggressive behavior may result from unrealistically positive self-evaluations that are disputed by others (Baumeister, Smart, & Boden, 1996). The present three studies tested this proposition concurrently and longitudinally for the domain of self-perceived social competence (SPSC) in 3-6th grade children on two continents. Each study tested whether aggressive behavior is related to general overestimation of SPSC compared to competence as perceived by peers, or to disputed overestimation, that is, overestimation disputed through rejection by peers. Specificity of relations with reactively or proactively aggressive behavior patterns was assessed and the predictive value of overestimation to the development of these types of aggressive behavior was investigated. Concurrently, disputed overestimation explained more variance in aggressive behavior than general overestimation, and was uniquely related to proactive aggression. Longitudinally, disputed overestimation also uniquely predicted changes in proactive, not reactive aggression.

Aggression↗

PubMed2006

Do early difficult temperament and harsh parenting differentially predict reactive and proactive aggression?

The goal of this study was to examine the links between difficult temperament (i.e., negative emotionality) and harsh parental discipline during toddlerhood, and reactive and proactive aggression in kindergarten. These links were assessed on a longitudinal population-based study of 1516 boys and girls followed longitudinally from the age of 17 months through the age of 72 months. Two possible models were tested to examine the interplay between negative emotionality and harsh parenting in predicting later reactive aggression compared to proactive aggression. The first was an additive model where both aspects make unique contributions in predicting later reactive aggression. The second model was an interactive model where harsh parenting exacerbates the link between negative emotionality and reactive aggression. Results showed a specific contribution of negative emotionality to reactive aggression. The results relative to harsh parenting are more mixed but nonetheless in line with developmental models stressing different pathways to reactive and proactive aggression.

Aggression↗

PubMed2006

Protective and compensatory factors mitigating the influence of deviant friends on delinquent behaviours during early adolescence.

This study examined factors that could moderate or compensate the link between exposure to deviant friends and delinquent behaviours in a sample of 265 early adolescents. The putative moderating or compensatory factors referred to the behavioural domain (i.e. novelty seeking, harm avoidance), the biological domain (i.e. physical maturation), the sociofamily domain (i.e. sociofamily adversity, parental practices), the school domain (i.e. academic performance), and the social domain (i.e. peer acceptance). A series of regression analyses showed that novelty seeking and puberty status moderated the link between friends' self-reported delinquency and participants' self-reported delinquency. In addition, all the factors except peer acceptance also had main effects that, cumulatively, reduced the association between friends' delinquency and self-rated delinquency through compensatory main effects. These results are discussed in light of the differential roles of moderating and of compensatory factors.

Adolescent↗

PubMed2006

Examining genetic and environmental effects on reactive versus proactive aggression.

This study compared the contribution of genes and environment to teacher-rated reactive and proactive aggression in 6-year-old twin pairs (172 pairs: 55 monozygotic girls, 48 monozygotic boys, 33 dizygotic girls, 36 dizygotic boys). Genetic effects accounted for 39% of the variance of reactive aggression and for 41% of the variance of proactive aggression. The remainder of the variance was explained by unique environmental effects. Genetic as well as unique environmental effects were significantly correlated across reactive and proactive aggression (genetic correlation = .87, environmental correlation = .34), but this overlap was largely due to a common underlying form of aggression (i.e., teacher-rated physical aggression). Once common etiological factors due to physical aggression were accounted for, reactive and proactive aggression shared no other genes and only a few environmental influences, although additional specific genetic and environmental effects were observed for both reactive and proactive aggression. These specific effects indicate that both reactive and proactive aggression may be influenced mostly by socialization experiences that are specific to each type of aggression and only to a very small degree by specific genes.

Age Factors↗

PubMed2006

Verbal abuse by the teacher and child adjustment from kindergarten through grade 6.

OBJECTIVES: Many adults mention past incidences of verbal abuse by the teacher as the most overwhelming negative experience in their lives. The present study examined (1) the course and stability of verbal abuse by the teacher from kindergarten through grade 4 and (2) the link between verbal abuse by the teacher and children's behavioral, emotional, and academic adjustment. DESIGN: Participants were 399 children (177 girls) who were assessed yearly over a period of 7 years, starting in kindergarten. Verbal abuse by the teacher, as well as acceptance versus rejection by the peer group from kindergarten through grade 4, were assessed through peer nomination. Child adjustment from kindergarten through grade 4 (antisocial behavior, attention problems, anxiety) was evaluated by the teacher. Child adjustment in early adolescence (delinquent behavior, depressive feelings, academic performance) was assessed by teacher evaluations and self-reports. RESULTS: The vast majority of children (approximately 85%) have almost 0 risk of becoming a target of verbal abuse by the teacher over the course of elementary school. However, a small minority of children (15%) seems to be at relatively high risk of verbal abuse by the teacher in kindergarten, and this risk increases even further over the course of elementary school. Boys, as well as children with high levels of early antisocial behavior and attention problems in kindergarten, are at high risk of verbal abuse by the teacher during elementary school. In turn, verbal abuse by the teacher is significantly related to subsequent delinquent behavior and academic difficulties in early adolescence, although this effect depends on child characteristics. CONCLUSIONS: Verbal abuse by the teacher seems to be a highly stable phenomenon for at-risk children. Children who are relatively well adjusted are at low risk of becoming the target of verbal abuse by the teacher. If they do, however, these children are the most vulnerable to subsequent developmental difficulties.

Child↗

PubMed2005

Joint trajectories of gambling, alcohol and marijuana use during adolescence: a person- and variable-centered developmental approach.

The usefulness of Moffitt's (1993) [Moffitt, T. E. (1993). Adolescence-limited and life-course-persistent antisocial behavior: A developmental taxonomy. Psychological Review, 100, 674-701.] theory of antisocial behavior was examined regarding gambling, alcohol and marijuana use. We assessed 903 Caucasian boys' developmental trajectories of these behaviors annually from age 11 through age 16. Severity of problems with these behaviors were assessed at ages 17 and 23. As correlates of these behaviors, teacher-rated personality and self-reported parenting were assessed at age 10. Self-reported autonomy was measured at ages 11 and 14. A cluster analysis on the correlates yielded two clusters. Membership in the cluster without adult problems was associated with either late onset of gambling and/or alcohol use trajectories or consistently low involvement in each of the behaviors. This cluster may correspond to Moffitt's adolescence-limited group and uninvolved adolescents, respectively. Membership in the cluster with subsequent adult problems was associated with early initiation of at least one of the three behaviors and involvement in each of them during adolescence. This cluster may correspond to Moffitt's life-course-persistent group. Findings indicate that early assessment of correlates used in the cluster analysis may be useful for screening and preventive purposes.

Adolescent↗

PubMed2005

Relations with parents and with peers, temperament, and trajectories of depressed mood during early adolescence.

The present study examined (a) whether groups of children can be empirically identified with distinct longitudinal profiles of depressed mood from late childhood through early adolescence, (b) to what extent these different longitudinal depression profiles are predicted by problematic relations with parents, same-sex peers, and other-sex peers, and (c) what role individuals' temperamental characteristics play in this context. Based on a sample of 414 early adolescents (197 girls), four groups were identified with distinct longitudinal profiles of depressed mood between ages 11 and 14: One group with consistently low levels of depressed mood, another with consistently moderate levels of depressed mood, a third group whose depressed mood increased sharply from late childhood through early adolescence, and a fourth group who already showed clinical-range levels of depressed mood during late childhood and whose depressive feelings increased even slightly more thereafter. Subsequent analyses revealed that rejection by same-sex peers was related to the odds of following an increasing trajectory of depressed mood, but only for girls with a highly reactive temperament. A problematic relationship with parents increased the odds of an elevated trajectory of depressed mood regardless of individual temperament. The theoretical and practical implications of these findings are discussed.

Adolescent↗

PubMed2004

Differential contribution of parents and friends to smoking trajectories during adolescence.

The purpose of this study was to assess the relative contribution of friends' and parents' smoking on the age of smoking initiation. A sample of 812 preadolescents, who were part of an accelerated longitudinal design, participated in the study over a 4-year period. Three smoking trajectory groups were first established: an age 11-12 starters group (5.7% of the sample), an age 12-13 starters group (11.1% of the sample), and an age 13-14 starters group (7.9% of the sample). A fourth trajectory group included the children who had not started smoking by age 15 years and who represented the majority of the participants (75.4%). After controlling for parental education, gender, and participants' behavioral and academic maladjustment, a series of logistic regressions revealed that parents' smoking assessed during the same year predicted membership in the age 11-12 starters trajectory group. Both parents' and friends' smoking predicted membership in the age 12-13 starters group. Finally, only friends' smoking predicted membership in the age 13-14 starters group. The results are discussed in light of the controversy about the contribution of parents' and friends' smoking behavior to smoking initiation in adolescents.

Adolescent↗

PubMed2004

Is there a dark side of positive illusions? Overestimation of social competence and subsequent adjustment in aggressive and nonaggressive children.

This study examined (a) the links between children's overly positive perceptions about the relations with the peer group and with their best friend to subsequent behavioral, emotional, and social adjustment, and (b) whether these links are moderated by children's aggression. Using a short-term longitudinal design, the study was based on a sample of 819 4th- to 6th-graders (427 girls) from low to average SES families. Results showed that positive illusions about their social relations with classmates and with friends were related to an increase in children's peer-rated social preference and fostered the stability of children's dyadic friendships, regardless of children's level of aggression. In addition, overestimation of social competence with the peer group and overestimation of friendship quality were both related to a decrease in children's depressive feelings. Extreme overestimation as well as extreme underestimation of social competence with the peer group was also related to an increase in children's aggression. This latter result, however, was only true for children who were highly aggressive to begin with. The theoretical and practical implications of these results are discussed.

Adolescent↗

PubMed2004

Trajectories of gambling during adolescence.

This study aimed at empirically identifying groups of adolescents with distinct longitudinal trajectories of gambling involvement and validating these groups by comparing them with respect to correlates. 903 low SES boys were followed annually from age 11 to 16 years. Three groups were found: an early-onset high-level chronic group, a late-onset high-level group, and a low gambler group. The Chronic group and the Low group consistently differed on teacher-rated inhibition (i.e., anxiety) during childhood and early adolescence. They also differed on concurrent teacher and self ratings of disinhibition (i.e., impulsivity), while the Late Onset group appeared to lie in between these groups. Compared to the Low group, both high groups subsequently had elevated scores on later gambling related problems.

Adolescent↗

PubMed2002

A longitudinal-experimental approach to testing theories of antisocial behavior development.

A longitudinal study with a nested preventive intervention was used to test five hypotheses generated from developmental theories of antisocial behavior. The longitudinal study followed 909 boys from their kindergarten year up to 17 years of age. The randomized multimodal preventive intervention targeted a subsample of boys who were rated disruptive by their kindergarten teacher. Semiparametric analyses of developmental trajectories for self-reported physical aggression, vandalism, and theft identified more types of trajectories than expected from recent theoretical models. Also, these trajectories did not confirm theoretical models, which suggest a general increase of antisocial behavior during adolescence. The majority of boys were on either a low-level antisocial behavior trajectory or a declining trajectory. Less than 6% appeared to follow a trajectory of chronic antisocial behavior. Comparisons between disruptive and nondisruptive kindergarten boys confirmed the hypothesis that disruptive preschool children are at higher risk of following trajectories of frequent antisocial behavior. Comparisons between treated and untreated disruptive boys confirmed that an intensive preventive intervention between 7 and 9 years of age, which included parent training and social skills training, could change the long-term developmental trajectories of physical aggression, vandalism, and theft for disruptive kindergarten boys in low socioeconomic areas. The results suggest that trajectories of violent behavior can be deflected by interventions that do not specifically target the physiological deficits that are often hypothesized to be a causal factor. The value of longitudinal-experimental studies from early childhood onward is discussed.

Adolescent↗

PubMed2002

Assessing aggressive and depressed children's social relations with classmates and friends: a matter of perspective.

This study examined aggressive, depressed, and aggressive-depressed children's peer relations from the children's own and from their peers' perspective. Participants were 819 fourth through sixth graders (50.2% girls) who were assessed twice during the same school year. Measures included children's aggression and depression, self-rated and peer-rated social acceptance, number of reciprocal friends, and self-rated and friend-rated friendship quality. Analyses revealed different patterns, depending on the perspective considered. Depression but not aggression was significantly related to difficulties with the peer group and with dyadic friends from the children's own perspective, whereas the opposite pattern was found according to the peers' view. The co-occurrence of aggression and depression entailed significant difficulties with peers regardless of perspective. The implications of these results for the links between children's aggression and depression and their interpersonal relationships are discussed.

Adolescent↗

PubMed2002

Reactively and proactively aggressive children: antecedent and subsequent characteristics.

BACKGROUND: Reactive and proactive subtypes of aggressive 10-11-12-year-old children were compared with non-aggressive children to examine whether the two forms of aggression were differentially related to antecedent and subsequent measures. METHOD: A large community sample of boys and girls was used. Reactive and proactive aggression was measured through teacher ratings when the children were 10, 11 and 12 years old. Antecedent measures were age 6 temperament and behavioral dispositions; subsequent measures were age 13 delinquency and depressive symptoms. RESULTS: Results indicated that reactive and proactive children had distinctive profiles on antecedent and subsequent measures. CONCLUSIONS: We conclude that children characterized by reactive or proactive aggression differ on several dimensions of personal functioning, and that reactive and proactive aggression are distinct forms of aggression, although both co-occur in a large proportion of aggressive children.

Adolescent↗

PubMedDate not supplied

A longitudinal confirmatory factor analysis of indirect and physical aggression: evidence of two factors over time?

The purpose of the present study was to examine whether indirect aggression was distinct from physical aggression across developmental periods. Participants were 3,089 Canadian children aged 4 to 7 years (Time 1), 6 to 9 years (Time 2), and 8 to 11 years (Time 3). Confirmatory factor analysis using an accelerated longitudinal design confirmed a 2-factor model that was stable across cohorts, time, and sex. The longitudinal predictive links between indirect and physical aggression were also examined in a path analysis. Findings did not support the notion that maturation is associated with changes in the ways children aggress but rather suggest that children are consistent in the type of aggression they use over time, whether it be indirect or physical.

Aggression↗

PubMedDate not supplied

Examining genetic and environmental effects on social aggression: a study of 6-year-old twins.

Using a genetic design of 234 six-year-old twins, this study examined (a) the contribution of genes and environment to social versus physical aggression, and (b) whether the correlation between social and physical aggression can be explained by similar genetic or environmental factors or by a directional link between the phenotypes. For social aggression, substantial (shared and unique) environmental effects but only weak genetic effects were found. For physical aggression, significant effects of genes and unique environment were found. Bivariate modeling suggests that social and physical aggression share most of their underlying genes but only very few overlapping environmental factors. The correlation between the two phenotypes can also be explained by a directional effect from physical to social aggression.

Aggression↗