This study investigated (1) reciprocal links among parental psychological control, peer rejection, and adolescent externalizing (aggressive and rule-breaking behaviour), and (2) the moderating effect of an adolescent genetic factor (biologically informed polygenic score for dopamine signalling). Three-year longitudinal data from 1,116 adolescents (51% boys; M age = 13.79) and their parents included psychological measures (adolescent-reported psychological control, peer-reported rejection, and parent-reported aggressive and rule-breaking behaviour). Cross-lagged analyses showed bidirectional effects between psychological control and both aggressive and rule-breaking behaviour and a unidirectional effect of peer rejection on both forms of problem behaviour over time. Multigroup structural equation modelling revealed genetic moderation only for rule-breaking behaviour: for adolescents with intermediate levels of dopamine signalling significant environmental effects were present, whereas adolescent effects of rule-breaking behaviour on psychological control were significant for adolescents with both intermediate and high profiles and effects on peer rejection only for adolescents with high dopamine profiles. Statement of contribution What is already known on this subject? Parental psychological control is related to adolescent externalizing problems. Experiencing peer rejection reinforces aggressive and rule-breaking behaviour. Single-gene studies show that dopaminergic genes influence externalizing problems directly or in interaction with the environment. What does this study add? Parental psychological control and adolescent aggressive and rule-breaking behaviour exacerbate one another longitudinally. Longitudinal associations between peer rejection and both subtypes of externalizing behaviour are unidirectional. With a polygenic approach, dopaminergic moderation is present for rule-breaking behaviour only.

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This study examined the structural validity of the parenting concept throughout adolescence. First, we examined whether an established five-dimension parenting model including support, proactive control, punitive control, harsh punitive control, and psychological control, showed longitudinal invariance across time (i.e., early, middle, and late adolescence) and measurement invariance across informants (i.e., mothers, fathers, and adolescents). Second, patterns of continuity and discontinuity in these dimensions were examined from the perspective of the different informants. In a four-wave accelerated longitudinal study with 1,111 adolescents and their parents, a multigroup structural equation modelling showed partial scalar invariance across adolescence and across informants. Subsequent growth modelling indicated that parenting was relatively stable over time and that similar patterns were present for mother, father, and adolescent ratings of parenting. Future research on associations between parenting and adolescent development can build on the findings of this study, given that comparing perspectives on parenting by different informants and over time seems to be valid.

This study examined the impact of four variables pertaining to the use of e-cigarettes (e-cigs) on cravings for tobacco cigarettes and for e-cigs after an overnight abstinence period. The four variables were the nicotine level, the sensorimotor component, the visual aspect, and the aroma of the e-cig. In an experimental study, 81 participants without prior vaping experience first got acquainted with using e-cigs in a one-week tryout period, after which they participated in a lab session assessing the effect of five minutes of vaping following an abstinence period of 12 h. A mixed-effects model clearly showed the importance of nicotine in craving reduction. However, also non-nicotine factors, in particular the sensorimotor component, were shown to contribute to craving reduction. Handling cues interacted with the level (presence/absence) of nicotine: it was only when the standard hand-to-mouth action cues were omitted that the craving reducing effects of nicotine were observed. Effects of aroma or visual cues were not observed, or weak and difficult to interpret, respectively.

The authors have no funding to report. Author contributions: Martijn Van Heel and Ba Tuan Vu were involved in the conceptualization of the study. Dung Tien Hoang collected the data. Martijn Van Heel drafted the article and Ba Tuan Vu, Guy Bosmans, Katja Petry, and Karla Van Leeuwen revised the manuscript.