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          <titl xml:lang="nl">RADAR-Old (Research on Adolescent Development And Relationships old cohort)</titl>
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        <AuthEnty affiliation="Utrecht University" xml:lang="en">Branje, S.
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      <abstract xml:lang="nl">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.</abstract>
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