Our relationships with our parents and our friends are considered the most essential and rewarding relationships in life. Especially in emerging adulthood, individuals spend a large and increasing amount of their time with others outside of the family. However, studies examining young adults’ relationships with various different close others simultaneously is limited. The main aim of this project was therefore to examine the nature and significance of relationships with parents (father and mother), friends, and romantic partners in emerging adulthood.

Participants were recruited together with their best friends. They were assessed in 3 different waves, each with a Time 1 assessment (Wave 1 n = 60, Wave 2 n = 94, Wave 3 n = 126) and follow-up 1 year later (Wave 1 follow-up n = 18, Wave 2 follow-up n = 39, Wave 3 follow-up n = 54). An overview of the number of unique individuals and complete dyads at each time point and per wave is presented in "Project_Description_TWFAF.pdf".

Questionnaires were distributed via Qualtrics. Active informed consent was requested at the start of the online survey. A detailed description of the procedures is presented in "Project_Description_TWFAF.pdf".

As participants were recruited together with their best friend, both members of a friend dyad were asked to report on their friendship quality. Moreover, each participant reported on their relationship with parents (father and mother) and romantic partner. Finally, they reported on a variety of questions regarding their mental health and well-being. An overview of all questions asked, including the answering options and labels is presented in "Codebook_TWFAF.xlsx".