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Featured researches published by H.F.L. Garretsen.


Cyberpsychology, Behavior, and Social Networking | 2009

The Compulsive Internet Use Scale (CIUS): Some Psychometric Properties

Gert-Jan Meerkerk; R.J.J.M. van den Eijnden; Ad A. Vermulst; H.F.L. Garretsen

The present study aimed to develop a short, easily administered, psychometrically sound, and valid instrument to assess the severity of compulsive Internet use. A set of criteria was determined based on the addiction literature. Next, the internal consistency and convergent validity were determined, and the set was tested as a one-factor solution in two representative samples of heavy Internet users (n = 447 and n = 229) and in one large convenience sample of regular Internet users (n = 16,925). In these three studies, respondents were asked about their online behavior and about problems related to Internet use. In the first study, the Online Cognition Scale (OCS) was included to determine concurrent validity. The newly developed Compulsive Internet Use Scale (CIUS) contains 14 items ratable on a 5-point Likert scale. The instrument showed good factorial stability across time and across different samples and subsamples. The internal consistency is high, and high correlations with concurrent and criterion variables demonstrate good validity.


Cyberpsychology, Behavior, and Social Networking | 2006

Predicting compulsive Internet use : It's all about sex

Gert-Jan Meerkerk; Regina J. J. M. van den Eijnden; H.F.L. Garretsen

The objective of this research was to assess the predictive power of various Internet applications on the development of compulsive Internet use (CIU). The study has a two-wave longitudinal design with an interval of 1 year. The first measurement contained 447 adult heavy Internet users who used the Internet at least 16 h per week and had Internet access at home for at least 1 year. For the second measurement, all participants were invited again, of whom 229 responded. By means of an online questionnaire, the respondents were asked about the time spent on various Internet applications and CIU. On a cross-sectional basis, gaming and erotica seem the most important Internet applications related to CIU. On a longitudinal basis, spending a lot of time on erotica predicted an increase in CIU 1 year later. The addictive potential of the different applications varies; erotica appears to have the highest potential.


Computers in Human Behavior | 2010

Is compulsive internet use related to sensitivity to reward and punishment, and impulsivity?

Gert-Jan Meerkerk; R.J.J.M. van den Eijnden; Ingmar H.A. Franken; H.F.L. Garretsen

Aim of the present study was to examine whether the personality correlates sensitivity to reward and to punishment, and impulsivity predict compulsive internet use (CIU). Furthermore, the predictive value of these personality correlates was compared to the predictive value of factors relating to psychosocial wellbeing. The results showed that particularly rash spontaneous impulsivity predicts CIU and that this personality factor is more important than psychosocial wellbeing factors. Sensitivity to reward, which is supposed to play a role in craving processes associated with substance abuse and eating disorders, could not be related to CIU. The data suggest that internet users who are characterized by an impulsive personality feature, are less able to control their use of the internet, which makes them more vulnerable to develop CIU.


Scandinavian Journal of Caring Sciences | 2008

Ranked motives of long‐term care providing family caregivers

Deirdre Beneken genaamd Kolmer; Agnes Tellings; John Gelissen; H.F.L. Garretsen; I.M.B. Bongers

Family caregivers provide long-term care to their chronically ill loved ones and as a consequence they experience physical, relational and financial problems. This study investigates how long-term family caregivers rank 12 motives for caregiving. Motives are derived from the views of four philosophical anthropologists and are related to self-reported stress and joy and to several different background characteristics of respondents. Motives that focus on feelings concerning the relationship between caregiver and care recipient are more popular as a first choice than motives stemming from feelings of obligation or a general feeling of happiness and are also more popular than more self-directed motives. An analysis of full ranking data shows that two groups can be distinguished, one group of family caregivers with mixed motives and one group of family caregivers with motives that focus on reciprocal mutually equal relationships. The latter are mainly women taking care for a partner or a child, the former report high levels of stress. Implications for intervention programmes and health policy are being discussed.


International Journal of Social Psychiatry | 2015

Comparing stigmatising attitudes towards people with substance use disorders between the general public, GPs, mental health and addiction specialists and clients

Leonieke C. van Boekel; Evelien P. M. Brouwers; Jaap van Weeghel; H.F.L. Garretsen

Background: Substance use disorders (SUDs) are among the most severely stigmatised conditions; however, little is known about the nature of these stigmatising attitudes. Aims: To assess and compare stigmatising attitudes towards persons with SUDs among different stakeholders: general public, general practitioners (GPs), mental health and addiction specialists, and clients in treatment for substance abuse. Methods: Cross-sectional study (N = 3,326) in which stereotypical beliefs, attribution beliefs (e.g. perceptions about controllability and responsibility for having an addiction), social distance and expectations about rehabilitation opportunities for individuals with substance use disorders were assessed and compared between stakeholders. Results: Individuals with substance use disorders elicited great social distance across all stakeholders. Stereotypical beliefs were not different between stakeholders, whereas attribution beliefs were more diverse. Considering social distance and expectations about rehabilitation opportunities, the general public was most pessimistic, followed by GPs, mental health and addiction specialists, and clients. Stereotypical and attribution beliefs, as well as age, gender and socially desirable answering, were not associated with social distance across all stakeholders. Conclusion: The general public and GPs expressed more social distance and were more negative in their expectations about rehabilitation opportunities, compared to mental health and addiction specialists and clients. Although stigmatising attitudes were prevalent across all groups, no striking differences were found between stakeholders.


Substance Use & Misuse | 2008

Effectiveness of an Outreach Treatment Program for Inner City Crack Abusers: Compliance, Outcome, and Client Satisfaction

Renée Henskens; H.F.L. Garretsen; I.M.B. Bongers; Ad van Dijk; F. Sturmans

In a randomized controlled trial the effectiveness of an outreach treatment program (OTP) was compared with standard addiction care services for hard-drug addicts in Rotterdam (The Netherlands). The study aimed at chronic, high-risk crack abusers who were insufficiently engaged in standard addiction treatment services. Data were collected from February 2000 to December 2001. A total of 124 subjects participated in the study at baseline. Follow-up data were available for 94 subjects. Outcome measures included treatment compliance, outcome, and satisfaction. Data were collected by means of monthly registrations, EuropAsi interviews and an evaluation form. There was a high compliance with OTP in the treatment group; the average length-of-stay was 6 months, with visits three times a week. Although both groups were well represented in standard care, participation was mainly based on methadone maintenance. Subjects treated in OTP showed significant improvements in physical health, general living conditions, and psychiatric status, but no change in employment, substance abuse, and legal status. The control group remained almost unchanged. Clients of OTP reported feeling very satisfied with their treatment. On-the-spot incentives and a positive relationship with the care provider were directly associated with treatment retention. An outreach treatment program, as conducted in this study, is associated with high compliance, general improvement, and treatment satisfaction. Characteristics of this treatment modality are (1) assertive outreach, (2) a mixed program with incentives, and (3) a strong focus on individual-bound therapy. Further research is needed with larger groups and similar conditions at baseline assessment.


Womens Health Issues | 2009

Vaccination Uptake and Awareness of a Free Hepatitis B Vaccination Program Among Female Commercial Sex Workers

Jessica E. Baars; Brigitte J.F. Boon; H.F.L. Garretsen; Dike van de Mheen

OBJECTIVES We sought to explore the reach of a free hepatitis B vaccination program among female commercial sex workers (CSWs) within a legalized prostitution setting in the Netherlands. We also investigated the reasons for nonparticipation and noncompliance. METHODS In this cross-sectional study based on ethnographic mapping and targeted sampling, 259 CSWs were interviewed at their work in 3 regions in the Netherlands. The semistructured interviews contained questions on sociodemographics, sexual risk behavior, sex work, awareness of the opportunity to obtain free hepatitis B vaccination, vaccination uptake, and compliance with the full vaccination schedule. RESULTS Of our sample, 79% reported awareness of the opportunity to obtain hepatitis B vaccination, and 63% reported to be vaccinated against hepatitis B (received > or =1 vaccination). A personal approach by health professionals or was associated with vaccination uptake, when specific sociodemographic variables, sexual behavior, and sex work related covariates were controlled for in the analysis. Window prostitution and the duration of working in the region were associated with awareness of the opportunity to obtain free hepatitis B vaccination. CONCLUSIONS The results of this study suggest that outreach activities (i.e., a personal approach) within this program are beneficial. Transient CSWs are more difficult to reach within the current vaccination program. These results can be used to increase the success of future health programs among this risk group.


Substance Abuse Treatment Prevention and Policy | 2013

Effectiveness of alcohol prevention interventions based on the principles of social marketing: a systematic review

Meriam M. Janssen; Jolanda J. P. Mathijssen; Marja Jh van Bon Martens; Hans van Oers; H.F.L. Garretsen

BackgroundAlcohol education aims to increase knowledge on the harm related to alcohol, and to change attitudes and drinking behaviour. However, little (lasting) evidence has been found for alcohol education, in changing alcohol-related attitudes and behaviour. Social marketing uses marketing techniques to achieve a social or healthy goal, and can be used in alcohol education. Social marketing consists of eight principles: customer orientation, insight, segmentation, behavioural goals, exchange, competition, methods mix, and is theory based. This review investigates the application of social marketing in alcohol prevention interventions, and whether application of social marketing influences alcohol-related attitudes or behaviour.MethodA literature search was conducted in PubMed, PsychInfo, Cochrane and Scopus. Inclusion criteria were that original papers had to describe the effects of an alcohol prevention intervention developed according to one or more principles of social marketing. No limits were set on the age of the participants or on the kind of alcohol prevention intervention. The abstracts of the 274 retrieved studies were reviewed and the full texts of potentially relevant studies were screened.ResultsSix studies met the inclusion criteria and were included in this review. These six studies showed associations for the application of social marketing techniques on alcohol-related attitudes or behaviour; one study relates to participation in a drinking event, four to alcohol drinking behaviour, two to driving a car while under the influence of alcohol, two to recognition of campaign messages or campaign logo, and one to awareness of the campaign. However, no associations were also found. In addition, the studies had several limitations related to a control group, response rate and study methodology.ConclusionBased on this review, the effect of applying the principles of social marketing in alcohol prevention in changing alcohol-related attitudes or behaviour could not be assessed. More research, with a good quality methodology, like using a randomized control trial and measuring short, medium, and long-term effects, is required on this topic. Policy implications are discussed.


Substance Use & Misuse | 1997

Heroin addicts in the community and in treatment compared for severity of problems and need for help

Anne Eland-Goossensen; Len A. M. van de Goor; H.F.L. Garretsen

This article focuses on differences and similarities between heroin addicts in the community and in three types of treatment and a model for help-seeking. Data were collected with the Addiction Severity Index (ASI). Analyses concentrated on severity of problems, concern regarding the problems, and need for help. The results indicate that differences exist across the groups. Psychological and social problems were more frequently reported by addicts applying for inpatient treatment. Occupational, health, and legal problems appeared not to be triggers for seeking professional help.


European Journal of Public Health | 2011

The reach of a hepatitis B vaccination programme among men who have sex with men

Jessica E. Baars; Brigitte J.F. Boon; H.F.L. Garretsen; Dike van de Mheen

BACKGROUND Homosexual contact is a major risk factor for acute hepatitis B infection. This study explores how many and which men who have sex with men (MSM) are reached by the ongoing hepatitis B vaccination programme in The Netherlands (started in 2002), and investigate reasons for non-participation and non-compliance. METHODS In this cross-sectional study, on the basis of ethnographic mapping and targeted sampling, 320 MSM were interviewed at different venues in three regions in The Netherlands. RESULTS Of the sample, 74% reported to be aware of the opportunity to obtain free hepatitis B vaccination, and 50% reported to be vaccinated (received at least one injection). Compliance with the three-dose vaccination schedule was 84%. The most important reason for non-participation in the vaccination programme was a low perceived risk of getting infected with the virus. A personal approach by STD-prevention workers, the recruitment region and having sex with casual partners were positively associated with vaccination uptake. Being bisexual was negatively associated with, and visiting gay bars/discos was positively associated with, awareness of the opportunity to obtain free hepatitis B vaccination. CONCLUSION This study shows a large proportion of MSM is aware that they could opt for free hepatitis B vaccination. Future vaccination programmes should focus on a personal approach, since the use of STD prevention workers was shown to be a successful tool for participation in the vaccination programme. The personal information should focus on perceived risk of infection, since this was a major reason for vaccine refusal.

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L. A. M. van de Goor

Erasmus University Rotterdam

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