Raw data.sav

Participants were 652 adolescents (age range: 11-20 years old, <i>M</i>_age =14.55 years, <i>SD</i> = 1.82; 338 boys (51.80%)) from two junior and two senior high schools in Wuhan, China. They completed questionnaires measuring family socioeconomic status (measured by the Family Affluence Scale), perceived social support (measured by the Multidimensional Scale of Perceived Social Support) , optimism (assessed by the Chinese version of the Life Orientation Test-Revised), and depression (measured by the Center for Epidemiologic Studies Depression Scale). Our research plan, questionnaires and the appropriate consent letters to students and their parents were submitted to the university’s Ethical Committee for Scientific Research, then examined by specialists and finally approved by the Ethical Committee. After obtaining the approval, we visited the selected school principals, handed out copies of questionnaires and consent letters, and asked for their cooperation. Then classroom teachers sent electronic consent letters to parents about the purpose of the research, the importance of the adolescents’ involvement and the voluntary nature of participation by the online Family-School Communication System and asked for parents’ support and permission. Students took home the printed consent letters that had to be signed by the students’ guardians. Classroom teachers also distributed printed consent forms to students and asked for their participation. Students with parental consent who also assented to participate were allowed to take part in the survey. A packet of self-report questionnaires was administered to students in groups of 40-50 at a time in those selected classes. Trained graduate students of psychology explained the requirements of the questionnaires using standard instructions that also stressed the anonymity of students’ identities in the survey. The average time students spent to complete the survey was approximately 15 minutes.<br>