本研究旨在瞭解高中職學生自傷行為盛行率之現況，以及檢視家庭功能和述情障礙對自傷行為之預測，並檢證述情障礙在家庭功能與自傷行為間所扮演之中介角色。本研究以高中與高職學生為研究對象，採分層（高中、高職）、叢集（以班為單位）方式進行抽樣，取得 2170 名有效樣本（高中生佔51.94%；女性佔52.13%），施以「簡式家庭功能量表」、「述情障礙量表」與「自傷行為量表」進行分析。本研究發現如下：（1）20.49%（95% 信賴區間為18.79%-22.19%）的高中職學生表示在過去一年內曾有過自傷行為，且女性顯著多於男性；（2）低家庭功能可顯著預測自傷行為；（3）述情障礙能顯著預測自傷行為；（4）低家庭功能可顯著預測述情障礙；以及（5）述情障礙能部分中介低家庭功能對自傷行為之影響。研究者根據研究結果提出建議，以供學校與諮商輔導人員及未來研究參考。
The present study aimed to understand the prevalence of nonsuicidal self-injury among senior high school students and to investigate the effect of family function and alexithymia in predicting nonsuicidal self-injury. In addition, we examined the mediating role of alexithymia in the relationship between family function and nonsuicidal self-injury. This study recruited 2170 senior high school students through stratified (high school and technical school) and clustered (class as unit) sampling (high school students: 51.94%; females 52.13%). Administered questionnaires included the short-form of Family Function Scale, 20-Item Toronto Alexithymia Scale, and Nonsuicidal Self-Injury Scale. Findings showed the following: (1) 20.49 % (95% confidence interval: 18.79%-22.19%) of the participants reported that they had nonsuicidal self-injury within twelve months; females showed significantly higher percentage than males. (2) Poor family function significantly predicted nonsuicidal self-injury. (3) Alexithymia significantly predicted nonsuicidal self-injury. (4) Poor family function significantly predicted alexithymia; and (5) Alexithymia mediated the relationship between poor family function and nonsuicidal self-injury. Findings from the present study provided suggestions and a reference for schools and guidance counselors, as well as for future research.