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Featured researches published by Paul Vedder.


Journal of Social Issues | 2001

Ethnic Identity, Immigration, and Well‐Being: An Interactional Perspective

Jean S. Phinney; Gabriel Horenczyk; Karmela Liebkind; Paul Vedder

On the basis of existing theory and research regarding ethnic identity and immigration and our own empirical work in four immigrant-receiving countries, we suggest an interactional model for understanding psychological outcomes for immigration. Specifically, the interrelationship of ethnic and national identity and their role in the psychological well-being of immigrants can best be understood as an interaction between the attitudes and characteristics of immigrants and the responses of the receiving society. This interaction is moderated by the particular circumstances of the immigrant group. The strengths of ethnic and national identity vary depending on the support for ethnic maintenance and the pressure for assimilation. Most studies show that the combination of a strong ethnic identity and a strong national identity promotes the best adaptation.


JAMA Pediatrics | 2014

Relationship Between Peer Victimization, Cyberbullying, and Suicide in Children and Adolescents: A Meta-analysis

Mitch van Geel; Paul Vedder; Jenny Tanilon

IMPORTANCE Peer victimization is related to an increased chance of suicidal ideation and suicide attempts among children and adolescents. OBJECTIVE To examine the relationship between peer victimization and suicidal ideation or suicide attempts using meta-analysis. DATA SOURCES Ovid MEDLINE, PsycINFO, and Web of Science were searched for articles from 1910 to 2013. The search terms were bully*, teas*, victim*, mobbing, ragging, and harassment in combination with the term suic*. Of the 491 studies identified, 34 reported on the relationship between peer victimization and suicidal ideation, with a total of 284,375 participants. Nine studies reported on the relationship between peer victimization and suicide attempts, with a total of 70,102 participants. STUDY SELECTION Studies were eligible for inclusion if they reported an effect size on the relationship between peer victimization and suicidal ideation or suicide attempt in children or adolescents. DATA EXTRACTION AND SYNTHESIS Two observers independently coded the effect sizes from the articles. Data were pooled using a random effects model. MAIN OUTCOMES AND MEASURES This study focused on suicidal ideation and suicide attempts. Peer victimization was hypothesized to be related to suicidal ideation and suicide attempts. RESULTS Peer victimization was found to be related to both suicidal ideation (odds ratio, 2.23 [95% CI, 2.10-2.37]) and suicide attempts (2.55 [1.95 -3.34]) among children and adolescents. Analyses indicated that these results were not attributable to publication bias. Results were not moderated by sex, age, or study quality. Cyberbullying was more strongly related to suicidal ideation compared with traditional bullying. CONCLUSIONS AND RELEVANCE Peer victimization is a risk factor for child and adolescent suicidal ideation and attempts. Schools should use evidence-based practices to reduce bullying.


European Journal of Developmental Psychology | 2008

Immigration, acculturation and the paradox of adaptation in Europe

David L. Sam; Paul Vedder; Karmela Liebkind; Félix Neto; Erkki Virta

Drawing from the International Comparative Study of Ethnocultural Youth (ICSEY) dataset, this paper examines the immigrant paradox phenomenon among a group of immigrant youth in five European countries. The sample consisted of over 2700 immigrant and 1400 national youth (age range 13 – 18 years) living in Finland, the Netherlands, Norway, Portugal and Sweden. At the core of the immigrant paradox is the counterintuitive finding that immigrants often show better adaptation outcomes than their national peers in spite of poorer socioeconomic status. However, the paper argues for a more conservative position based on three criteria for concluding the existence of the paradox. On the bases of these criteria, the paper found mixed support for the immigrant paradox. Whereas the pattern of socio-cultural adaptation for first- and second-generation immigrants resembled the immigrant paradox, results for psychological adaptation were opposite to the paradox. Reasons for the mixed findings are discussed.


International Journal of Obesity | 2014

Are overweight and obese youths more often bullied by their peers? A meta-analysis on the relation between weight status and bullying

M van Geel; Paul Vedder; Jenny Tanilon

Research suggests that overweight and obese youths are stigmatized in contemporary society, and are more likely than normal-weight youths to become the victims of bullying. In the current study, meta-analyses were performed to analyze to what extent overweight and obese youths are more likely than normal-weight youths to be the victims of bullying. The databases Psychinfo, ERIC and Medline were searched for relevant articles. Retrieved articles were scanned to find further articles. Language was not used as an exclusion criterion. A total of 14 articles (N=55 231) were included in a meta-analysis on bullying and overweight youths, and a total of 16 articles (N=58 520) were included in a meta-analysis on bullying and obese youths. The results suggested that both overweight and obese youths were more likely to be victims of bullying. The results were not moderated by gender, overweight and obese boys and girls were equally likely to be victimized. Results remained significant after adjustment for publication bias. Both overweight and obesity are risk factors for being a victim of bullying.


Journal of Youth and Adolescence | 2009

The Intergenerational Transmission of Values in National and Immigrant Families: The Role of Zeitgeist

Paul Vedder; John W. Berry; Colette Sabatier; David L. Sam

Correspondence in value orientation between parents and their offspring may be due to actual transmission processes between generations, but it may also be due to influences from the general value context in society that are common to parents and their offspring. This common value context is referred to as Zeitgeist. The present study deals with one family relationship value (i.e., parents’ and adolescents’ obligations toward the family). Participants were 1,252 immigrant and 726 national adolescent–parent dyads from 10 Western countries. There were significant relationships between the value placed on family obligations among parents and offspring, and these were independent of gender. Zeitgeist effects, both intergenerational and intragenerational, were found. The strength of these Zeitgeist effects depended on the basis for defining Zeitgeist, either a person’s own ethnic group or the wider community including both nationals and immigrants. For explaining national adolescents’ acceptance of their family obligations, both the ethnic and the national Zeitgeist played a role, whereas in the immigrant groups only the ethnic Zeitgeist played a significant role. In short, in an immigration context it makes sense to distinguish the influence of a person’s own ethnic group from the influence of the wider community, including other ethnic groups. Explanations are suggested and implications are discussed.


Child Abuse & Neglect | 2015

Over three decades of longitudinal research on the development of foster children: A meta-analysis

Anouk Goemans; Mitch van Geel; Paul Vedder

Large numbers of children over the world experience foster care each year. How best to satisfy their developmental needs and how to avoid placement breakdowns and negative consequences of foster care are important challenges. In this study, a series of four meta-analyses is performed to examine the longitudinal developmental outcomes of children in foster care. The focus is on adaptive functioning and behavioral outcomes. A literature search identified 11 studies suitable for inclusion in the meta-analysis on adaptive functioning (N=1,550), 24 studies for the meta-analysis on internalizing problems (N=1,984), 21 studies for the meta-analysis on externalizing problems (N=1,729) and 25 studies for the meta-analysis on total behavior problems (N=2,523). No overall improvement or deterioration was found for adaptive functioning. However, studies with a timespan longer than one year and studies with larger sample sizes showed development toward more negative adaptive functioning than studies with shorter timespans or smaller samples. No overall increases or decreases in internalizing, externalizing or total behavior problems were found. Based on these results, it is concluded that foster care does not negatively or positively affect foster childrens developmental trajectories. Given that many children enter foster care with problems, this is a worrying situation. Further longitudinal research to find the factors necessary for improving foster childrens developmental chances is recommended. Furthermore, routine screening and targeted foster-care interventions are adviseable to ensure that all children, who cannot be raised by their own parents, receive the support conducive to their positive development.


Journal of Adolescent Research | 2005

Language, Ethnic Identity, and the Adaptation of Immigrant Youth in the Netherlands.

Paul Vedder

We explored the relationships between immigrant adolescents’ first-and second-language proficiency and their psychological and sociocultural adaptation using three models: the ethnic identity model, the language assimilation model, and the language integration model. The study was conducted in the Netherlands. Participants were 161 Turkish and 95 Surinamese adolescents (ages 13 to 18 years). In the Turkish group we found support for the language assimilation model as well as for the language integration model. In the Surinamese group a stronger orientation toward the original ethnic culture corresponded to more negative adaptation outcomes. This effect mirrors the assimilation model. The ethnic identity model did not contribute to explaining adaptation differences between immigrant adolescents in the Netherlands.


Group Processes & Intergroup Relations | 2011

Multicultural attitudes among adolescents: The role of ethnic diversity in the classroom

Mitch van Geel; Paul Vedder

In this study predictors of multiculturalism at the individual and classroom level are tested in a multilevel model. Previous studies attempting to find predictors of multiculturalism focused only on the individual level, possibly risking an attribution error. Multiculturalism is presented in this study as a notion stressing equal opportunities and minimizing discrimination as well as the conviction that the access to other cultures enriches ones own life. Using a sample of 448 adolescents from junior vocational education it was found that more ethnic diversity at the classroom level is positively related to adolescents’ support for multiculturalism. As such, this study supports the intergroup contact theory.


Scandinavian Journal of Psychology | 2010

The adaptation of non-western and Muslim immigrant adolescents in the Netherlands: An immigrant paradox?

Mitch van Geel; Paul Vedder

This article addresses the possible existence of an immigrant paradox in a sample of immigrant adolescents attending vocational schools in the Netherlands. An immigrant paradox is the finding that first generation immigrants show a more positive pattern of adaptation than nationals despite poorer economic conditions. Second generation immigrants regress to the nationals in terms of adaptation. A sample of 152 first generation immigrant adolescents, 285 second generation immigrant adolescents and 406 national adolescents completed self-reports about socio-economic status, psychological problems, behavioral problems and self-esteem. The results supported the existence of an immigrant paradox in this sample. This indicates that further assimilation among immigrant adolescents does not necessarily lead to increased well being.


JAMA Pediatrics | 2014

Bullying and weapon carrying: a meta-analysis

Mitch van Geel; Paul Vedder; Jenny Tanilon

IMPORTANCE Studies suggest that adolescents involved in bullying are more likely to carry weapons than their uninvolved peers. OBJECTIVE To use meta-analyses to determine whether victims, bullies, and bully-victims are more likely to carry weapons than uninvolved peers. DATA SOURCES PsycINFO, ERIC, MEDLINE, LILACS, EMBASE, and Dissertation Abstracts International were searched for relevant publications (1950 through January 2014). The reference list of a review article and reference lists of retrieved articles were checked for further relevant studies. STUDY SELECTION Studies were included if they provided an effect size comparing the weapon carrying of adolescent victims, bullies, or bully-victims with that of uninvolved peers. Studies that included individuals older than 21 years were excluded, as were studies that focused on incarcerated youth or youth diagnosed as having a psychopathologic condition. DATA EXTRACTION AND SYNTHESIS Studies were coded independently by 2 of us. The agreement rate was 93%. Effect sizes were coded that compared victims, bullies, or bully-victims with uninvolved peers. Meta-analyses were based on 22 studies for victims (n = 257 179), 15 studies for bullies (n = 236 145), and 8 studies for bully-victims (n = 199 563). MAIN OUTCOMES AND MEASURES This study focused on weapon carrying among adolescents. Hypotheses were formulated before the study. RESULTS Victims (odds ratio, 1.97; 95% CI, 1.62-2.39), bullies (3.25; 2.72-3.89), and bully-victims (4.95; 3.77-6.50) were more likely to carry weapons than uninvolved peers. Analyses provided no indication of publication bias. Studies conducted in the United States found stronger relations between being a bully-victim and weapon carrying (odds ratio, 7.84; 95% CI, 6.02-10.21) than studies from other countries (3.62; 2.30-5.68; Q1 = 8.401; P = .004). CONCLUSIONS AND RELEVANCE Involvement in bullying as a victim, bully, or bully-victim is related to weapon carrying.

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Hetty Kook

University of Amsterdam

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Jean S. Phinney

California State University

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