The study was based on self-report questionnaires and used a quasi-experimental design (intervention/control) with four repeated measurements (pre-, post-test, two follow-ups) over two years. Study participants (German school students; N = 1318) were in grade 5 and grade 8 at pre-test. Levels of developmental assets (Benson et al., 2006) were assessed as proximal indicators of program effectiveness. Data on further variables associated with PYD (e.g., school bonding, life skills) and on problem behaviors (e.g., substance use) were also gathered. Local coordinators involved in the implementation of nelecom were trained by a team of educationalists, developmental psychologists, and neuroscientists. The program content (e.g., structured leisure activities) was negotiated and selected within each intervention community separately according to the needs of the youths. Ideally, selected activities offered adolescents options for participation, were long-term oriented, and included supervision by adult role models (Perkins & Borden, 2003). A process evaluation documented the activities and examined the implementation quality in each intervention community.
A multivariate ANCOVA with repeated measures revealed some beneficial program effects on developmental assets (e.g., on perceptions of the community as a resource). Positive program effects were pronounced for those adolescents who were indeed exposed to nelecom activities. Participating in nelecom also appeared to promote life skills and to reduce problem behaviors. Results of the process evaluation suggested ways on how to further improve the effectiveness of the program.
In the discussion, we will focus on the importance of long-enduring support and broad exposure to new learning experiences as ingredients of effective community-based PYD programs. Moreover, strategies to reach as much adolescents as possible with such programs will be discussed.