1. Full name: Bui Thi Bich                                2. Sex: Female
3. Date of birth: 03/08/1998                              4. Place of  birth: Hai Phong
5. Admission decision number: 2606 /QĐ-XHNV Dated 26/11/2021 from the Principal of the University of Social Sciences and Humanities, Vietnam National University, Hanoi
6. Changes in academic process: None
7. Official thesis title: Friendship and self-esteem of adolescents.
8. Major: Psychology                                          9. Code: 8310401.01
10. Supervisors: Associate professor Ph.D. Nguyen Van Luot, Faculty of Psychology,  University of Social Sciences and Humanities, Vietnam National University, Hanoi
11. Summary of the findings of the thesis:
The study was conducted based on the attachment theory to investigate the frequency of friendship and self-esteem in adolescents. In addition, the study also investigated the relationship between friendships and self-esteem in adolescents. The study was a convenient sample of 221 students at a secondary school in Hai Phong City. Of which men account for 44.8%, women account for 55.2%. Participants took part in the study by answering a questionnaire about demographic characteristics, the Rosenberg Self-Esteem Scale and the Peer Relationship Scale. Research results show that adolescents' friendships are relatively high. Regarding self-esteem, the level of adolescents’ self-esteem is medium. In addition, friendships are positively correlated with adolescents’ self-esteem. In addition, there are differences in grades and academic performance when students evaluate self-esteem. However, no differences existed in adolescents' friendships regarding gender, grades, and academic performance. As a result, some suggestions are offered to students, families, and schools for boosting friendship and self-esteem in adolescents.
12. Practical applicability, if any:
The research results have contributed to proving the hypothesis of Attachment Theory about the relationship between peer relationships and adolescents' self-esteem. Research shows a positive correlation between friendship relationships and adolescents' self-esteem. From there, recommendations are suggested to improve the quality of friendships and self-esteem of adolescents.
13. Further research directions, if any: None
14. Thesis-related publications: None