AimsTo evaluate the effectiveness of two preventive interventions to reduce heavy drinking in first-and second-year high school students. Design and setting Cluster randomized controlled trial using four conditions for comparing two active interventions with a control group from 152 classes of 19 high schools in the Netherlands. Participants A total of 3490 first-year high school students (mean 12.68 years, SD = 0.51) and their parents. Intervention conditions (i) Parent intervention (modelled on the Swedish Örebro Prevention Program) aimed at encouraging parental rule-setting concerning their children's alcohol consumption; (ii) student intervention consisting of four digital lessons based on the principles of the theory of planned behaviour and social cognitive theory; (iii) interventions 1 and 2 combined; and (iv) the regular curriculum as control condition. Main outcome measures Incidence of (heavy) weekly alcohol use and frequency of monthly drinking at 10 and 22 months after baseline measurement. Findings A total of 2937 students were eligible for analyses in this study. At first follow-up, only the combined student-parent intervention showed substantial and statistically significant effects on heavy weekly drinking, weekly drinking and frequency of drinking. At second follow-up these results were replicated, except for the effects of the combined intervention on heavy weekly drinking. These findings were consistent across intention-to-treat and completers-only analyses.Conclusions Results suggest that adolescents as well as their parents should be targeted in order to delay the onset of drinking, preferably prior to onset of weekly drinking.

AimTo extend the scholarly debate on (a) whether or not the compulsive use of games and social media should be regarded as behavioral addictions (Kardefelt-Winther et al., 2017) and (b) whether the nine DSM-5 criteria for Internet gaming disorder (IGD; American Psychiatric Association [APA], 2013) are appropriate to distinguish highly engaged, non-disordered users of games and social media from disordered users, this study investigated the impact of engaged and disordered use of games and social media on the psychosocial well-being and school performances of adolescents.MethodsAs part of the Digital Youth Project of the University of Utrecht, a three-wave longitudinal sample of 12- to 15-year-old adolescents (N = 538) was utilized. Three annual online measurements were administered in the classroom setting, including IGD, social media disorder, life satisfaction, and perceived social competence. Schools provided information on students’ grade point average.ResultsThe symptoms of disordered use of games and social media showed to have a negative effect on adolescent’s life satisfaction, and the symptoms of disordered gaming showed a negative impact on adolescents’ perceived social competence. On the other hand, heavy use of games and social media predicted positive effects on adolescents’ perceived social competence. However, the heavy use of social media also predicted a decrease in school performances. Several gender differences in these outcomes are discussed.ConclusionThe findings propose that symptoms of disordered use of games and social media predict a decrease in the psychosocial well-being and school performances of adolescents, thereby meeting one of the core criteria of behavioral addictions.

This is the first review of combined student- and parent-based interventions to prevent and reduce alcohol and other drug use. Whilst existing combined student- and parent-based programs have shown promising results, key gaps in the literature have been identified and are discussed in the context of the development of future prevention programs. [Newton NC, Champion KE, Slade T, Chapman C, Stapinski L, Koning I, Tonks Z, Teesson M. A systematic review of combined student- and parent-based programs to prevent alcohol and other drug use among adolescents. Drug Alcohol Rev 2017;36:337-351].

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The PAS programme proved to be effective as predicted by the theoretical assumptions underlying the interventions. Interventions with parents and adolescents to prevent adolescent alcohol consumption may usefully target parental rules about alcohol and adolescents' self-confidence.

IntroductionThis two-wave prospective study investigated the bidirectional relation between Internet-specific parenting (reactive restrictions, Internet-specific rules, and frequency and quality of communication about Internet) and adolescents’ symptoms of social media disorder (SMD) and Internet gaming disorder (IGD). In addition, we investigated whether this relation was different for boys and girls.MethodsA sample of 352 adolescents (48.9% boys, Mage = 13.9, SDage = 0.74, range: 11–15) completed questionnaires at two waves. Zero-inflated cross-lagged analyses in Mplus were performed to predict the level of IGD and SMD symptoms by Internet-specific parenting practices and vice versa, while controlling for age, level of education, and outcome at T1.ResultsMore frequent parent–adolescent communication about Internet predicted more IGD (β = 0.26, p = .03) and SMD symptoms among boys, and more restrictive rules predicted fewer SMD symptoms among girls (β = −0.23, p = .08). More IGD symptoms predicted more reactive rules (β = 0.20, p = .08) among boys and girls and a higher frequency (β = 0.16, p = .02) and lower quality of communication (β = −0.24, p < .001) among boys and girls, respectively.ConclusionsThis study demonstrates bidirectional relations between Internet-specific parenting and IGD symptoms, but not SMD symptoms. Displaying IGD symptoms seems to elicit ineffective parental responses, which may further exacerbate problematic involvement in gaming. With respect to problematic social use media among girls, this study suggests that parents should set strict rules regarding Internet use, prior to problematic use of social media. Longitudinal studies on the role of parenting in development of Internet-related disorders would be promising in enhancing our understanding of how parents can effectively prevent problematic involvement in online behaviors among their children.

The present study examined the associations of alcohol‐specific socialization practices and heavy parental drinking with alcohol use in early adolescents. Cross‐sectional nationwide survey data from 2599 parent–adolescent (mean age = 12.16) dyads were used to conduct logistic regression analyses. Onset of alcohol use as well as infrequent and regular drinking were associated with tolerant rules and attitude as reported by adolescents, and by a tolerant attitude as reported by parents. In contrast to former studies including middle and late adolescents, parental alcohol use was not found to be associated with early adolescent alcohol use, nor did parental alcohol use influence the impact of parental rules. Restrictive alcohol‐specific socialization was, independent of parental alcohol use, related to absence of (regular) early adolescent drinking. Thus, this study demonstrated that in early adolescence alcohol‐specific parenting is more important for adolescent drinking than parental alcohol use.