A Text-Based Expressive Writing Program for Adolescents at Risk of Suicide

Suicide represents a major public health concern among adolescents and young adults. In South Korea, suicide has consistently ranked as the leading cause of death among individuals aged 10-29 years. Preventive interventions targeting suicidal ideation and early stages of suicide risk are therefore urgently needed.

Existing evidence-based interventions for suicidal behaviors, including dialectical behavior therapy (DBT) and cognitive behavioral therapy (CBT), have demonstrated clinical effectiveness but require intensive therapist involvement and specialized training. These characteristics limit their scalability and accessibility in many community and school-based settings.

Expressive writing is a brief psychological intervention originally developed by Pennebaker and colleagues, in which individuals write about emotionally significant experiences. The intervention is believed to promote emotional labeling, cognitive processing, and narrative integration of stressful experiences. Neuropsychological research suggests that labeling emotions may reduce amygdala activation and facilitate regulation through prefrontal cortical mechanisms. Meta-analytic studies have also reported improvements in psychological outcomes among adolescents who engage in expressive writing.

However, randomized controlled trials evaluating expressive writing interventions specifically for adolescents and young adults at risk of suicide remain limited. In addition, most existing interventions are unstructured, which may limit their suitability for high-risk populations.

The present study aims to develop and evaluate a structured text-based expressive writing program designed for adolescents and young adults with suicide risk. The intervention is designed to promote emotional awareness, self-understanding, relational awareness, and meaning reconstruction through guided writing prompts delivered over four weeks.

Participants aged 13-24 years with a history of suicidal ideation, suicide attempts, or non-suicidal self-injury will be recruited from clinical and community settings. After screening and baseline assessment, participants will be randomly assigned to one of two groups:

• Experimental group: 4-week structured expressive writing intervention plus treatment as usual (TAU)
• Control group: TAU alone

Participants in the intervention group will complete guided writing exercises multiple times per week. Each writing session will take approximately 15-20 minutes and will be supported by structured prompts designed to facilitate emotional expression and cognitive processing.

Primary and secondary outcomes will be assessed at baseline, 4 weeks (post-intervention), and 8 weeks (follow-up). The primary outcome is change in suicidal ideation measured using the Beck Scale for Suicide Ideation (BSSI). Secondary outcomes include depressive symptoms, impulsivity, self-esteem, and help-seeking behavior.

The study is designed as a randomized controlled trial with parallel assignment. A total of 160 participants will be enrolled. The findings of this study may contribute to the development of accessible and scalable suicide prevention interventions for adolescents and young adults.

Inclusion criteria

• Adolescents or young adults aged 13 to 24 years.
• Individuals with a history of suicidal ideation, suicide attempts, or non-suicidal self-injury.
• Individuals currently receiving mental health services or who have been evaluated as having suicide risk within the past 6 months.
• Ability to read and write in Korean.
• For participants under 19 years of age, both participant assent and parental consent are required.

Exclusion criteria

• Individuals requiring immediate psychiatric hospitalization.
• Severe intellectual disability or neurodevelopmental disorder that prevents participation in writing activities.
• Acute psychosis or manic episode that would interfere with participation in the study.
• Participation in another suicide prevention clinical trial during the study period.