Development and evaluation on reliability and validity of Adolescent Non-suicidal Self-injury Assessment Questionnaire

Objective To develop and evaluate the reliability and validity of the Adolescent Non-suicidal Self-injury Assessment Questionnaire and the psycho-evaluation of its reliability and validity was carried out,and to provide an instrument for better understanding adolescent non-suicidal self-injury.Methods A total of 15 096 middle school students were selected from junior and senior middle school in Shenyang,Zhenzhou,Nanchang and Shenzhen.The reliability and validity of the questionnaire were evaluated by Cronbach's alpha coefficient,split-half reliability coefficient,confirmatory factor analysis and so on.A total of 94 middle students were selected to investigate the test-retest reliability coefficient and criterion validity by the Functional Assessment of Self-mutilation.Results The Adolescent Non-suicidal Self-injury Assessment Questionnaire included two parts:the behavior questionnaires (12 items) and the functional questionnaires (19 items).The Cronbach's alpha coefficient,split-half reliability coefficient,test-retest reliability coefficient of the behavior questionnaires were 0.921,0.851,0.843,respectively.The correlation coefficient between FASM behavior score and the behavior questionnaires was 0.833 (P<0.01).The Cronbach's alpha coefficient,splithalf reliability coefficient,test-retest reliability coefficient of the functional questionnaires was 0.905,0.786,and 0.805,respectively.The correlation coefficient between FASM behavior score and the functional questionnaires was 0.833 (P<0.01).Conclusion The Adolescent Non-suicidal Self-injury Assessment Questionnaire has a good reliability and validity,so it can be used as an effective tool for assessment of adolescents in China non-suicidal self-injury behavior and self-injury function.