The Research on Adolescent Development And Relationships-old cohort (RADAR-old) is an ongoing longitudinal study that started in 2002/2003. RADAR-old focuses on the interactions and conflicts of adolescents with parents and peers, their emotional state, personality, identity, and internalizing and externalizing problem behaviour. RADAR-Old investigates the development of 327 participants from early adolescence into young adulthood (currently, data is available upon request from ages 13-28 years old). Additionally, their parent(s), intimate partner (from W7 onwards), sibling, and (best) friend also participated in the study.
**ATTENTION: To request this data, please follow the instructions in file 4. DANS_data request form RADAR-OLD-[date]-[name].pdf and request the files in the Data files tab from this page.