Introduction
This study is complex in that it adds a trial of a universal parent training intervention (i.e., the Parent Web, PW) in early adolescence to a completed trial of a social emotional learning (SEL) intervention called preschool PATHS [Promoting Alternative Thinking Strategies; 1] which was implemented with a cohort of Swedish children during early childhood (4–5 years old) in their preschools [The preschool edition of PATHS is designed to promote social emotional competence [SEC is also an important construct because it is foundational to the completed preschool PATHS trial [The aim of this study is twofold: 1) to provide a booster intervention (namely PW) aimed at improved parenting support and practices at the transition into adolescence to a cohort of parents whose children have previously participated in preschool PATHS, and 2) to examine the (incremental) effects of the universal edition of PW in a quasi-experimental trial.