Objective: To explore the relationship among positive self-presentation in online social networking sites (SNS), online positive feedback, self-esteem and depression in adolescents. Methods: 1361 middle and high school stu- dents were conveniently chosen to engage in a survey research including SNS Positive Self-presentation Questionnaire, SNS Positive Feedback Questionnaire, Self-esteem Scale as well as Depression Scale. Results: (1)The relationships between each pair of SNS positive self-presentation, online positive feedback and self-...