Ellis ter Beek - Academia.edu (original) (raw)

Papers by Ellis ter Beek

The current study investigated the effect on recidivism of treatment aimed at juveniles who have ... more The current study investigated the effect on recidivism of treatment aimed at juveniles who have sexually offended. It also assessed the potential moderating effect of type of recidivism, and several treatment, participant and study characteristics. In total, 14 published and unpublished primary studies, making use of a comparison group and reporting on official recidivism rates, were included in a multilevel meta-analysis. This resulted in the use of 77 effect sizes, and 1726 participants. A three-level meta-analytic model was used to calculate the combined effect sizes (Cohens d) and to perform moderator analyses. Study quality was assessed with the EPHPP Quality Assessment Tool for Quantitative Studies. A moderate effect size was found (d = 0.37), indicating that the treatment groups achieved an estimated relative reduction in recidivism of 20.5% as compared to comparison groups. However, after controlling for publication bias, a significant treatment effect was no longer found. Type of recidivism did not moderate the effect of treatment, indicating that treatment groups were equally effective for all types of recidivism. Also, no moderating effects of participant or treatment characteristics were found. Regarding study characteristics, a shorter follow up time showed a trend for larger effect sizes, and the effect size calculation based on proportions yielded larger effect sizes than calculation via mean frequency of offending. Implications for future research and clinical practice are discussed.

Juveniles with harmful sexual behavior constitute a heterogeneous group regarding treatment needs... more Juveniles with harmful sexual behavior constitute a heterogeneous group regarding treatment needs and reoffending patterns. In general, intensive mandated treatment aims at reducing recidivism risk and, therefore, criminogenic treatment needs. Sexual recidivism by juveniles, however, is scarce and mostly adolescence limited. No psychological typology to date represents a higher at sexual recidivism risk subgroup. Risk assessment instruments generally overestimate recidivism risk, so allocation to mandated intensive treatment aimed at reducing sexual recidivism risk is a difficult task. Up to 38% percent of juveniles with harmful sexual behavior in the Netherlands were found to be allocated to too intensive and restrictive treatments, considered detrimental to development and treatment motivation. Incremental treatment effect on reduction of recidivism was established as small to moderate (d=0.37), but influenced by publication bias, indicating small, possibly non-significant, result...

Aggression and Violent Behavior, 2018

This multilevel meta-analysis examined the effects of treatment for juveniles with harmful sexual... more This multilevel meta-analysis examined the effects of treatment for juveniles with harmful sexual behavior on psychosocial functioning, and the potential moderating effects of outcome, treatment, participant, and study characteristics. In total, 23 studies, comprising 31 independent samples and 1342 participants, yielded 362 effect sizes (Cohen's d). A moderate overall effect size was found of d = 0.60, indicating that groups receiving treatment achieved an estimated relative improvement in psychosocial functioning of 33%. Type of outcome did moderate the effect of treatment, indicating that effects on atypical sexual arousal and empathy (a trend) were smaller, compared to effects on other outcomes. Most prominently, studies of weak quality produced larger effect sizes. Unexpectedly, non-established treatments had more effect than did established treatments, which may be explained by the use of less rigorous study designs. Treatment groups with a higher percentage of juveniles w...

Het project Lerend Transformeren heeft als doel door middel van actieonderzoek professionals en h... more Het project Lerend Transformeren heeft als doel door middel van actieonderzoek professionals en hun organisaties te ondersteunen bij het ontwikkelen van een nieuwe werkstijl die past bij de transformatiedoelen. In deze bijdrage wordt dit project als voorbeeld belicht om te laten zien hoe actieonderzoek kan bijdragen aan de transformatie in de jeugdzorg. Inleiding Het is een turbulente tijd voor organisaties die betrokken zijn bij de jeugdzorg. Na de transitie zijn organisaties bezig te transformeren en met elkaar de zorg inhoudelijk te vernieuwen. Een van de opgaven voor professionals is het bewerkstelligen van een nieuwe 'werkstijl' gericht op de transformatiedoelen. De transformatiedoelen, vijf in totaal, kunnen gezien worden als de concretisering van het veranderde idee over jeugdhulp. In de Memorie van toelichting van de Jeugdwet zijn de vijf doelen beschreven (zie het kader) [1]. 'Preventief', 'normaliserend', 'op maat' en 'dichtbij huis', 'integraal' en 'met minder regeldruk' zijn steekwoorden die de beoogde transformatie weergeven. Opdracht voor professionals en jeugdhulporganisaties Professionals en jeugdhulporganisaties behoren (al is het maar om continuïteit van werk te garanderen) het

Tijdschrift voor gezondheidswetenschappen

Journal of abnormal child psychology, Jan 25, 2017

International journal of offender therapy and comparative criminology, 2016

The aim of this study was to compare results of and develop guidelines for mandatory allocation o... more The aim of this study was to compare results of and develop guidelines for mandatory allocation of sexually transgressive juveniles to Multisystemic Therapy - Problem Sexual Behavior (MST-PSB), Secure Youth Care (SYC), or Forensic Youth Care (FYC), based on the risk-need-responsivity model. Results of current allocation showed a population with relatively less treatment needs to receive community-based MST-PSB, compared with populations receiving residential SYC and FYC. Furthermore, estimated recidivism risk levels did not always support the need for risk reduction by the imposition of limitation of freedom of movement and maximum supervision, provided by all three treatment modalities. Based on the assessed sexual recidivism risk, 38% of the juveniles in FYC, 7% in SYC, and 24% in MST-PSB received treatment that was too intensive, which is considered detrimental to motivation and development. Future allocation practices could benefit from assessing treatment needs and recidivism r...

Jeugd en Co Kennis, 2009

Justitieel Pedagogisch Centrum de Sprengen begon ruim een jaar geleden een proces om meer samenha... more Justitieel Pedagogisch Centrum de Sprengen begon ruim een jaar geleden een proces om meer samenhang te brengen in de benadering en de behandeling van de geplaatste jongeren. Bovendien wilde de Sprengen meer gaan werken met erkende gedragsinterventies. Samen met de Sprengen deed het Nederlands Jeugdinstituut onderzoek om te bepalen wat de sterke kanten zijn van de bestaande behandeling en benadering

Jeugd En Co Kennis, Jun 1, 2009

Aggression and Violent Behavior, 2018

Tijdschrift voor gezondheidswetenschappen

Journal of abnormal child psychology, Jan 25, 2017

International journal of offender therapy and comparative criminology, 2016

Jeugd en Co Kennis, 2009

Jeugd En Co Kennis, Jun 1, 2009