Adolescents' Non-suicidal Behavior and Perception of Parents' Negative Emotional Expression and Family Communication

1.Case group: NSSI patient group: Inclusion Criteria: 1. Patients who meet the diagnostic criteria in DSM-5 and are clinically diagnosed as NSSI; 2. Age range: 15-25 years old; 3. Clear consciousness, normal speech function, able to communicate in Chinese and reading chinese; Exclusion Criteria: 1. Users with organic diseases and psychoactive substances; 2. NSSI； caused by autism, TIC disorder, mental retardation and other emotional instability and bad mood; 3. Religious self-injury or customary self-injury; 4. Patients with schizophrenia, schizoaffective disorder, alcohol dependence, organic mental disorder and other mental disorders have been previously diagnosed. 2.Control group 1: Non-NSSI patients Inclusion criteria: 1. Psychiatric outpatients or inpatients can read and understand the contents of the questionnaire; 2. Patients who do not meet the diagnostic criteria in DSM-5 and are clinically diagnosed as NSSI. 3. Age range: 15-25 years old; 4. Patients and/or guardians can give informed consent and participate in this study. Exclusion criteria: 1. Patients whose illness causes them unable to communicate or fill out questionnaires; 2. Non-serious mental diseases, such as schizophrenia and schizoaffective disorder. 3.Control group 2: Healthy group Inclusion criteria 1. No mental illness; 2. Age range: 15-25 years old; 3. Clear consciousness, normal speech function, able to communicate in Chinese and reading chinese; 4. Patients and/or guardians can give informed consent and participate in this study. Exclusion criteria (1) Young people and adolescents who are unable to communicate or fill out questionnaires due to various organic reasons.