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Dive into the research topics where Astrid M. G. Poorthuis is active.

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Featured researches published by Astrid M. G. Poorthuis.


Child Development | 2010

I like me if you like me: on the interpersonal modulation and regulation of preadolescents’ state self-esteem

Sander Thomaes; Albert Reijntjes; Bram Orobio de Castro; Brad J. Bushman; Astrid M. G. Poorthuis; Michael J. Telch

This experiment tested whether peer approval and disapproval experiences can cause immediate change in childrens state self-esteem. Childrens narcissistic traits and evaluator perceived popularity were examined as potential moderators. A total of 333 preadolescents (M = 10.8 years) completed personal profiles on the Internet that were ostensibly judged by a jury consisting of popular and unpopular peers. Participants randomly received negative, neutral, or positive feedback from the jury. Next, they could examine the feedback that each individual judge gave them. As expected, peer disapproval decreased self-esteem, especially in children high in narcissism. In contrast, peer approval increased self-esteem. Moreover, disapproved childrens self-esteem recovery was dependent on the extent to which they subsequently viewed positive feedback from popular judges. These findings support sociometer theory.


Cognitive Therapy and Research | 2012

Cognitive Distortions and Self-Regulatory Personality Traits Associated with Proactive and Reactive Aggression in Early Adolescence.

Sophieke Koolen; Astrid M. G. Poorthuis; Marcel A. G. van Aken

This study investigated mechanisms behind proactive and reactive aggression, by examining whether four types of self-serving cognitive distortions and the personality traits agreeableness and conscientiousness differently predicted proactive and reactive aggression. Self-report questionnaires and a peer nominations method were administered to 173 sixth grade children (age 10–13) of regular elementary schools in the Netherlands. Negative binomial regression analyses showed that proactive aggression was predicted by self-centered and disagreeable tendencies, whereas reactive aggression was predicted by the misattribution of blame to others and the self-regulatory aspects of agreeableness and conscientiousness. Findings emphasize the need to differentiate proactive and reactive aggression in order to accurately predict, prevent and treat aggressive behaviors in childhood.


Journal of Experimental Child Psychology | 2012

Prosocial tendencies predict friendship quality, but not for popular children.

Astrid M. G. Poorthuis; Sander Thomaes; Jaap J. A. Denissen; Marcel A. G. van Aken; Bram Orobio de Castro

Is prosocial behavior a prerequisite for having good-quality friendships? This study (N = 477, mean age = 12.2 years) examined whether the link between childrens prosocial tendencies and their perceived friendship quality was dependent on childrens level of popularity in the peer group. Childrens prosocial tendencies were assessed both as observed behavior in a standardized setting and as a self-reported predisposition to act in prosocial ways. Across measures, the results showed that prosocial tendencies are associated with higher perceived friendship quality among nonpopular children (i.e., children holding average or lower levels of popularity), but not among popular children. Thus, even if they lack prosocial qualities, popular children are still able to hold good-quality friendships. Popular children may have other compensating characteristics, such as popularity by association, that make them attractive for peers to be friends with.


Aggressive Behavior | 2017

Psychological processes in young bullies versus bully-victims

Anouk van Dijk; Astrid M. G. Poorthuis; Tina Malti

Some children who bully others are also victimized themselves (“bully‐victims”) whereas others are not victimized themselves (“bullies”). These subgroups have been shown to differ in their social functioning as early as in kindergarten. What is less clear are the motives that underlie the bullying behavior of young bullies and bully‐victims. The present study examined whether bullies have proactive motives for aggression and anticipate to feel happy after victimizing others, whereas bully‐victims have reactive motives for aggression, poor theory of mind skills, and attribute hostile intent to others. This “distinct processes hypothesis” was contrasted with the “shared processes hypothesis,” predicting that bullies and bully‐victims do not differ on these psychological processes. Children (n = 283, age 4–9) were classified as bully, bully‐victim, or noninvolved using peer‐nominations. Theory of mind, hostile intent attributions, and happy victimizer emotions were assessed using standard vignettes and false‐belief tasks; reactive and proactive motives were assessed using teacher‐reports. We tested our hypotheses using Bayesian model selection, enabling us to directly compare the distinct processes model (predicting that bullies and bully‐victims deviate from noninvolved children on different psychological processes) against the shared processes model (predicting that bullies and bully‐victims deviate from noninvolved children on all psychological processes alike). Overall, the shared processes model received more support than the distinct processes model. These results suggest that in early childhood, bullies and bully‐victims have shared, rather than distinct psychological processes underlying their bullying behavior.


Pediatrics | 2014

Unconditional Regard Buffers Children’s Negative Self-Feelings

Eddie Brummelman; Sander Thomaes; Gregory M. Walton; Astrid M. G. Poorthuis; Geertjan Overbeek; Bram Orobio de Castro; Brad J. Bushman

BACKGROUND: Unconditional regard refers to the feeling that one is accepted and valued by others without conditions. Psychological theory suggests that experiences of unconditional regard lead children to feel that they are valuable despite setbacks. We hypothesized that reflecting on experiences of unconditional regard would buffer children’s negative self-feelings (eg, shame, insecurity, powerlessness) in the face of setbacks. To test this hypothesis, we randomized children to reflect on experiences of unconditional regard or other experiences, and examined their response to an academic setback 3 weeks later. METHODS: Participants (11–15 years old) were randomly assigned to reflect for 15 minutes on experiences of unconditional regard (n = 91), conditional regard (n = 80), or other social experiences (n = 76). Research personnel, teachers, and classmates remained blind to condition assignment. Three weeks later, after receiving their course grades, children reported their self-feelings. Course grades were obtained from school records. Receiving low course grades represents a salient and painful real-world setback for children. RESULTS: Replicating previous research, children who received lower grades experienced more negative self-feelings (P < .001). As predicted, this well-established relationship was significantly attenuated among children who had reflected, 3 weeks previously, on experiences of unconditional regard (Ps < .03). Reflecting on unconditional regard specifically reduced negative self-feelings after low grades (P = .01), not after average or high grades (Ps > .17). CONCLUSIONS: Reflecting on unconditional regard buffered children’s selves against the adverse impact of an academic setback over an extended period of time. Unconditional regard may thus be an important psychological lever to reduce negative self-feelings in youth.


International Journal of Behavioral Development | 2018

See Me through My Eyes: Adolescent-Parent Agreement in Personality Predicts Later Self-Esteem Development.

Ziyan Luan; Astrid M. G. Poorthuis; Roos Hutteman; Jens B. Asendorpf; Jaap J. A. Denissen; Marcel A. G. van Aken

Achieving a clear view of one’s personality is a challenging but crucial developmental task during adolescence, which has enduring influences. This task might be harder if significant others see individuals differently from how the adolescents see themselves. Supporting this, the looking-glass-self theory suggests that significant others constitute a social mirror into which the individual gazes to form his/her self-view. The present study was the first to longitudinally examine whether self–other agreement in personality during adolescence (i.e., self–parent and self–friend agreement at age 12 and self–mother and self–father agreement at age 17) promote self-esteem development from age 17 to 29 years (N =186, 53% boys). Results for girls consistently confirmed the hypothesized beneficial effect of self–parent agreement, while the picture was more complicated for boys. That is, for girls, self–parent agreement at age 12 and age 17 both predicted steeper increases in self-esteem. For boys, steeper self-esteem development was predicted by higher self–parent agreement at age 12, but unexpectedly, also by lower self–parent agreement at age 17. All these results remained after controlling for (self-rated) personality. Moreover, self–friend agreement did not show any effects on self-esteem development, suggesting that the influence of peers’ convergence with self-views during early adolescence may not be as prominent as parents’. Results are discussed from the perspective of self-view formation and maintenance during adolescence and young adulthood. The present study sheds light on the longitudinal effect of one’s own view of personality being shared by important others on self-esteem development.


Journal of Personality | 2018

Unique predictive power of other-rated personality: An 18-year longitudinal study

Ziyan Luan; Astrid M. G. Poorthuis; Roos Hutteman; Jaap J. A. Denissen; Jens B. Asendorpf; Marcel A. G. van Aken

Abstract Objective What is gained by having others report on ones personality? Research on adult samples has suggested that informant reports are especially informative regarding traits that are highly visible and evaluative (i.e., socially desirable/undesirable instead of neutral), such as Openness, Conscientiousness, and Agreeableness. This 18‐year longitudinal study aims to demonstrate the unique predictive power of other‐rated personality in adolescence, using life outcomes and personality in adulthood as trait criteria. Method We examined the unique predictive power of self‐ and other‐rated Big Five personality traits at age 12 and 17 on self‐rated life outcomes and personality at age 29 (e.g., educational achievement, work income, depression, moral transgressions, and relationship satisfaction). Participants were 186 German adolescents (53% boys), their parents and friends at age 12, and their mothers and fathers at age 17. Results Other‐ratings showed unique predictive power beyond self‐ratings for all Big Five traits, with the most consistent results for Openness, Conscientiousness, and Agreeableness. Conclusions Results demonstrate the added value of including other‐reports on adolescent personality when predicting future life outcomes and personality, especially for highly visible and evaluative traits. The present study sheds light on the predictive power of self‐ versus other‐rated personality and personality–outcome associations.


Journal of Educational Psychology | 2014

Do grades shape students' school engagement? : The psychological consequences of report card grades at the beginning of secondary school

Astrid M. G. Poorthuis; Jaana Juvonen; Sander Thomaes; Jaap J. A. Denissen; Bram Orobio de Castro; Marcel A. G. van Aken


Social Development | 2014

Dashed hopes, dashed selves? A sociometer perspective on self-esteem change across the transition to secondary school

Astrid M. G. Poorthuis; Sander Thomaes; Marcel A. G. van Aken; Jaap J. A. Denissen; Bram Orobio de Castro


European Journal of Psychological Assessment | 2014

Personality in Action

Astrid M. G. Poorthuis; Sander Thomaes; Jaap J. A. Denissen; Marcel A. G. van Aken; Bram Orobio de Castro

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Jens B. Asendorpf

Humboldt University of Berlin

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