Ad A Vermulst

Ad A Vermulst
Radboud University | RU · Behavioural Science Institute

Dr.

About

147
Publications
90,879
Reads
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7,528
Citations
Citations since 2016
30 Research Items
4122 Citations
20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
20162017201820192020202120220100200300400500600
Additional affiliations
August 1974 - January 2013
Radboud University
Position
  • Senior Researcher

Publications

Publications (147)
Article
In gezingsgerichte hulp wordt het vergroten van de empowerment van ouders als een belangrijke manier gezien om positieve behandeluitkomsten te bereiken, zoals in het probleemgedrag van hun kinderen. Empirisch onderzoek is echter schaars en alleen gericht op ontwikkelingen tijdens gezinsgerichte hulp. De voorliggende studie onderzocht In gezingsgeri...
Article
Full-text available
Depressie is een veelvoorkomende psychische stoornis, met een geschatte prevalentie van 16% onder Nederlandse volwassenen en tussen 0,4 en 8,3% bij kinderen en adolescenten. Na reguliere behandeling van depressie herstelt minder dan de helft van de cliënten volledig, waarbij 3-5% therapieresistent is. Hoe jonger iemand een depressie krijgt, des te...
Article
Full-text available
Depressie onder jongeren is wereldwijd een zorgelijk probleem. Vroegtijdige signalering en onderkenning van de problematiek en het aanbieden van effectieve preventie is daarom belangrijk. Om depressiepreventie duurzaam aan te bieden werd STORM ontwikkeld. Deze preventieve aanpak is geïmplementeerd binnen de schoolomgeving waarbij gebruik gemaakt is...
Preprint
Full-text available
BACKGROUND: Measurement-Based Care (MBC) is a promising way to improve outcomes in clinical practice, but the implementation of MBC is often problematic and the uptake by clinicians is low. METHODS: We used an effectiveness-implementation hybrid design based on Grol and Wensing’s implementation framework to examine the results of clinician-focused...
Article
Background: Perceived well-being is key in the recovery from major depressive disorder (MDD). It is however unclear how well-being relates to other aspects of recovery, like depressive symptom severity, acceptance, disease identification and social participation. In patients with MDD we investigated 1) changes in these five concepts over time, 2)...
Article
Full-text available
Suicide among adolescents is a significant health concern. Gaining more knowledge about markers that contribute to or protect against suicide is crucial. Perfectionism is found to be a personality trait that is strongly predictive for suicidality; it can be divided into personal standards perfectionism (PS) and concerns about mistakes and doubts pe...
Article
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Background: Studies on feedback in youth mental health care are scarce and implementation of feedback into clinical practice is problematic. Objective: To investigate potentially effective components of feedback from Routine Outcome Monitoring (ROM) in youth mental health care in the Netherlands through a three arm, parallel-group, randomized contr...
Article
The present study examined the long-term treatment outcomes of the family-centered program Intensive Family Treatment (IFT) for families with multiple problems. We also tested the hypothesis that parental empowerment at the end of IFT constitutes a buffer between the negative influences of parental stress on their children’s behavioral problems aft...
Article
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Our most recent RCT provides evidence that indicated depression prevention is effective in reducing depressive symptoms in adolescents when implemented in the school community. In the present study we further test the potential effects of this prevention approach on symptoms related to depression: anxiety, suicidality, somatic symptoms, and perfect...
Article
Adolescent depression is a major concern for public health and is associated with negative consequences and outcomes. Identifying adolescent characteristics that might relate to the risk for developing depression is crucial. This study investigated bidirectional associations between coping strategies and depressive symptoms over time. The participa...
Article
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Background: The Multicenter Youth Flexible ACT Study is an ongoing observational prospective cohort study that examines the effects of Youth Flexible ACT (Assertive Community Treatment) on young people with complex care needs who are difficult to engage in traditional (office-based) mental health services. However, a clear and detailed description...
Article
Full-text available
Objective In mental health care, treatment effects are commonly monitored by symptom severity measures. This study aimed to investigate the relationship between symptom severity and well‐being in the treatment of patients with major depressive disorder (MDD). Methods Adult MDD outpatients (n = 77) were administered the Quick Inventory of Depressiv...
Article
Full-text available
We examined (1) the extent to which the family-centered program Intensive Family Treatment (IFT) succeeds in realizing beneficial parental psychological empowerment and child behavioral outcomes both in single-parent and two-parent families and (2) how these outcomes are influenced by the presence of a co-caregiver as a potential source of empowerm...
Article
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Background: Adolescent depression is a global mental health concern. Identification and effective prevention in an early stage are necessary. The present randomized, controlled trial aimed to examine the effectiveness of Cognitive Behavioral Therapy (CBT)-based depression prevention in adolescents with elevated depressive symptoms. This prevention...
Article
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Background Based on self‐reported social capital, different typologies of family networks of people with intellectual disabilities were examined. Associations between behavioural and emotional problems or well‐being and typologies were investigated. Method 137 participants with mild intellectual disability were interviewed using the Family Network...
Article
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Introduction When adolescents experience complex psychiatric and social problems, numerous healthcare services usually become involved. In these cases, fragmentation of care services is a risk that often results in both ineffective care and in patients disengaging from care services. To address these issues, Youth Flexible Assertive Community Treat...
Article
Background and objectives In the clinical setting, a large proportion of children with an autism spectrum disorder (ASD) experience impairing anxiety symptoms. Recently, an applied videogame called Mindlight has been developed that focuses on decreasing anxiety in children. The present study involved a randomized controlled trial (RCT) investigatin...
Article
Background Laparoscopy is the gold standard for many surgical procedures and is embraced as minimally invasive surgery in the enhanced recovery after surgery programme. Lowering intra-abdominal pressure during laparoscopy may decrease the degree of surgical injury and further enhance patient outcomes. This study aims to assess the effect of low pre...
Article
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Depressive disorders are highly prevalent during adolescence and they are a major concern for individuals and society. The Response Style Theory and the Scar Theory both suggest a relationship between response styles and depressive symptoms, but the theories differ in the order of the development of depressive symptoms. Longitudinal reciprocal pros...
Article
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Outcomes of a randomized controlled trial on the effectiveness of depression and anxiety prevention for adolescents with a high familial risk A randomized controlled trail was conducted to examine the effectiveness of a depression and anxiety prevention program ‘Een Sprong Vooruit’ (A Leap Forward) among adolescent girls (N = 142) with a high famil...
Article
In deze studie onderzochten we veranderingen in empowerment van ouders en gedragsproblemen van hun kinderen tijdens een periode van jeugdzorg, en hun onderlinge relaties. Ook stelden we vast of deze veranderingen samenhangen met het soort jeugdzorg dat werd geboden. We vergeleken hiervoor intensief ambulante hulp die gezinsgericht was (family-centr...
Article
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Objective: Children with autism spectrum disorder (ASD) often have comorbid depressive symptoms and suicidal ideation. The aim of this study was to examine levels of depressive symptoms and suicidal ideation in a sample of children with ASD, normal cognitive functioning and elevated anxiety. Methods: In total, 93 children aged 8–16 years with ASD a...
Article
The aim of this study was to examine changes in parental empowerment and child behavioural problems during a period of youth care and how changes are related to the kind of services provided. We compared a preservation service that was family‐centred (FCS) with out‐of‐home services that were primarily child‐centred (CCS). The sample consisted of 62...
Article
Full-text available
A randomized controlled trial was conducted to examine the effectiveness of a depressionand anxiety prevention program ‘Een Sprong Vooruit’ (A Leap Forward) among adolescent girlswith a high familial risk (N= 142). The results showed neither effects of the prevention programdirectly after the intervention, nor at 6 or 12 months follow-up on depress...
Article
Full-text available
Anxiety is highly prevalent in children with an autism spectrum disorder (ASD). However, there is inconsistency in studies investigating the prevalence and risk factors of anxiety in children with ASD. Therefore, the first aim of this study was to give an overview of the prevalence of anxiety symptoms in a clinical Dutch sample of children with ASD...
Chapter
ABSTRACT The childrearing attitude of parents will tend to repeat itself again and again in a similar way to the parent's own upbringing as a child by his or her own parents. To a certain degree the children will also be treated in the same way in which the parent was treated formerly by his or her parents. There are many indications in the litera...
Article
Full-text available
In this study, the construct validity and reliability of the Empowerment questionnaire (EMPO) that was developed in Dutch youth care was examined. The 12-item EMPO focuses on measuring parental empowerment in raising their children. The three components of psychological empowerment (intrapersonal, interactional, and behavioral) form the rationale f...
Article
Full-text available
Background Adolescents are at risk of developing depressive symptoms. Given the prevalence, recurrence and negative consequences of adolescent depression, it is crucial to implement prevention programs for high-risk adolescents. Prevention programs at an indicated level have shown to be successful in reducing depressive symptoms in adolescents. Thi...
Article
Full-text available
The Strengths and Difficulties Questionnaire is one of the most employed screening instruments. Although there is a large research body investigating its psychometric properties, reliability and validity are not yet fully tested using modern techniques. Therefore, we investigate reliability, construct validity, measurement invariance, and predictiv...
Article
Large-scale international surveys are important to globally evaluate, monitor, and promote children's mental health. However, use of young children's self-reports in these studies is still controversial. The Dominic Interactive, a computerized DSM-IV-based child mental health self-report questionnaire, has unique characteristics that may make it pr...
Article
Full-text available
Background and aims The international monitoring, evaluation and improvement of children’s mental health has become increasingly important. Large-scale research studies are conducted to establish this, but few of them use child self-report as an additional instrument to parent and teacher report or to other available statistics. The Dominic Interac...
Article
Socio-demographic heterogamy is commonly believed to lead to lower relationship stability due to the presence of cultural differences between partners. This explanation lacks empirical support, as psychology studies have not confirmed the link between heterogamy and cultural differences, whereas sociological studies have been characterized by probl...
Article
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Iedere ouder ervaart bij tijd en wijle weleens stress bij het opvoeden. Wanneer deze stress niet van tijdelijke aard is of wanneer de stress erg hoog wordt, kan professionele hulp ingeschakeld worden. Het vaststellen van de aard en ernst van de opvoedingsstress is dan van belang. De Opvoedingsbelastingvragenlijst (OBVL) is een recent ontwikkeld ins...
Article
Both clinicians and researchers agree on the value of self-report in child mental health assessment. The pictorial format of the computerized Dominic Interactive is an addition to the existing questionnaires, specifically concerning young children. Although prior studies on the Dominic Interactive reported favorable psychometric properties, the rel...
Article
To evaluate the effectiveness of the Healthy School and Drugs programme on alcohol, tobacco, and marijuana use among Dutch early adolescents. Randomized clustered trial with two intervention conditions (i.e., e-learning and integral). General population of 11 to 15-year-old adolescents in the Netherlands. A total of 3,784 students of 23 Dutch secon...
Article
Background: Prevalence studies of Internet addiction in the general population are rare. In addition, a lack of approved criteria hampers estimation of its occurrence. Aims: This study conducted a latent class analysis (LCA) in a large general population sample to estimate prevalence. Methods: A telephone survey was conducted based on a random...
Article
The aim of this study was to examine whether anticipated parental reactions to smoking were related to smoking onset and progression during adolescence. Data were used from the six-wave, 5-year longitudinal "Family and Health" project, in which N = 428 adolescents (M = 13.4, SD = .50; 52.3% girls) and their families participated. Parental reactions...
Article
Jonge adolescente meisjes met depressieve symptomen hebben een verhoogd risico om een depressie te ontwikkelen later in de adolescentie of in volwassenheid. Daarom is preventie in deze risicogroep belangrijk. Het doel van de huidige studie was het onderzoeken van het effect van de Cognitieve Gedrags Therapie (CGT) component van het depressie preven...
Article
Full-text available
Although peer victimization is of major concern and adolescents spend increasing amounts of time on the Internet, relatively little is known about the psychosocial antecedents and consequences of online victimization. The main aim of this study was to compare the psychosocial antecedents and consequences of online versus real-life victimization. Mo...
Article
Depression rates rise dramatically from the early to late adolescence. Especially young adolescent girls with elevated depressive symptoms are at high risk for developing a depression during adolescence or adulthood. Therefore, the prevention of depression is important especially in this high-risk group. The aim of the present study was to examine...
Article
The Strengths and Difficulties Questionnaire (SDQ) is a widely used screening instrument for child psychopathology. Many studies have consistently reported rather low α values for certain subscales for the SDQ parent version. Further, the factor structure has not been tested frequently by using confirmatory factor analysis (CFA); research into meas...
Article
The effect of educational differences between partners on marital quality and stability is commonly analysed using difference, or compound measures. This article considers the theoretical foundations for these approaches and examines an alternative approach, diagonal reference models (DRMs). The three methods are then compared empirically, using da...
Chapter
Full-text available
This study investigates the moderating role of the quality of online and real-life friendship on the relationship between video game addiction and psychosocial well-being. It uses a large-sample paper-and-pencil questionnaire study conducted in 2009 on secondary schools in the Netherlands. This resulted in a sample of 4054 schoolchildren (aged 13-1...
Article
Full-text available
Abstract The study explores the reliability, validity, and measurement invariance of the Video game Addiction Test (VAT). Game-addiction problems are often linked to Internet enabled online games; the VAT has the unique benefit that it is theoretically and empirically linked to Internet addiction. The study used data (n=2,894) from a large-sample p...
Article
Full-text available
Background In 2005 a new compulsory residential treatment program was developed for adolescents in need for protection against themselves or their environment. Objective The aim of the present study was to examine the association of structural treatment characteristics of this new residential treatment program (i.e., duration of treatment, discharg...
Article
Full-text available
Expressive suppression is regarded as a generally ineffective emotion regulation strategy and appears to be associated with the development of depressive symptoms among adolescents. However, the mechanisms linking suppression to depressive symptoms are not well understood. The main aim of this study was to examine two potential mediators of the pro...
Article
Full-text available
Various studies found personality to be related to substance use, but little attention is paid to the role of personality risk dimensions with regard to an early onset of alcohol, tobacco, and marijuana use. Therefore, the current study used a variable-centered approach to examine whether anxiety sensitivity, hopelessness, sensation seeking, and im...
Article
Background Children and youths’ self-report of mental health problems is considered essential but complicated. Objective This study examines the psychometric properties of the Dominic Interactive, a computerized DSM-IV based self-report questionnaire and explores informant correspondence. Methods The Dominic Interactive was administered to 214 Du...
Article
Full-text available
Cross-sectional studies have shown a positive association between expressive suppression and depressive symptoms. These results have been interpreted as reflecting the impact of emotion regulation efforts on depression. However, it is also possible that depression may alter emotion regulation tendencies. The goal of the present study was to prospec...
Article
Precursors of marijuana use in early adolescence are largely unknown because studies generally focus on marijuana use among older adolescents or adults. In this study, we examined precursors of marijuana use in a sample of 1023 Dutch early adolescents (aged 11-14 at Time 1) who were never-marijuana user at baseline, by applying a 3-wave longitudina...
Conference Paper
Full-text available
This study investigates the moderating role of the quality of online and real-life friendship on the relationship between video game addiction and psychosocial well-being. It uses a large-sample paper-and-pencil questionnaire study conducted in 2009 on secondary schools in the Netherlands. This resulted in a sample of 4054 schoolchildren (aged 13-1...
Article
The first aim of this study was to gain more insight into the bi-directionality between alcohol-specific parental factors (i.e., parents' alcohol use, alcohol availability at home, parental rule setting, and frequency and quality of communication about alcohol) and adolescents' alcohol intake and alcohol-related problems. The second aim was to exam...
Article
Full-text available
The present study examined construct equivalence of the teacher Strengths and Difficulties Questionnaire and compared mean scores in an ethnically diverse sample of children living in the Netherlands. Elementary schoolteachers completed the Strengths and Difficulties Questionnaire for 2,185 children aged 6 to 10 years of the four largest ethnic gro...
Article
Full-text available
The present study examined whether a sample of 214 (52.8% male, M age = 15.76, SD = 1.29) institutionalized adolescents could be classified into subgroups based on psychopathic traits. Confirmatory Factor Analyses revealed a relationship between the subscales of the Youth Psychopathic traits Inventory (YPI) and the three latent constructs of the or...
Article
To provide empirical data-driven identification of a group of addicted online gamers. Repeated cross-sectional survey study, comprising a longitudinal cohort, conducted in 2008 and 2009. Secondary schools in the Netherlands.   Two large samples of Dutch schoolchildren (aged 13-16 years). Compulsive internet use scale, weekly hours of online gaming...
Article
In psychiatric research it is often assumed that detrimental effects of negative life events on mental health can be buffered by a number of positive life events. However, there is no convincing empirical evidence that this assumption is correct; it can even be argued that positive life events act as additional stressors rather than as buffers, lea...
Article
Current insights indicate that Web-based delivery may enhance the implementation of brief alcohol interventions. Previous research showed that electronically delivered brief alcohol interventions decreased alcohol use in college students and adult problem drinkers. To date, no study has investigated the effectiveness of Web-based brief alcohol inte...
Article
An unresolved issue in psychiatry research concerns the assumption that detrimental effects of negative life events on mental health may be buffered by a multitude of positive life events. However, there is clear lack of empirical evidence for this assumption, and one may even argue that positive life events act as additional stressors and thus inc...
Article
Because the effects of susceptibility genes on alcohol use may differ as a function of age throughout adolescence and young adulthood, prospective study designs, in addition to cross-sectional ones are needed in genetic association studies. The short, low activity allele of a polymorphism (5-HTTLPR) in the serotonin transporter gene (SLC6A4) has be...