This study aims to evaluate the feasibility and preliminary effects of the MIND-SET Intervention Module, an integrated Motivational Interviewing and Rational Emotive Behavior Therapy (MI-REBT) intervention, among Malaysian primary school students involved in Non-Suicidal Self-Injury (NSSI) behaviour. The module is designed to reduce self-injurious behaviour, improve emotional regulation, and enhance readiness for change among 12-year-old students in school settings. This study will use a quasi-experimental design involving three groups: a MIND-SET intervention group, a PRISMA Mental Health Module group, and a treatment-as-usual group. Data will be collected at pre-intervention, post-intervention, and follow-up stages using validated psychological instruments. The findings are expected to support the development of culturally responsive, school-based mental health interventions for children involved in NSSI behaviour in Malaysia.

Non-Suicidal Self-Injury (NSSI) among children and adolescents is an increasingly important mental health concern worldwide, including in Malaysia. NSSI refers to deliberate self-injurious behaviour without suicidal intent and is often associated with emotional distress, maladaptive coping, emotional dysregulation, and interpersonal difficulties. These concerns highlight the need for early, structured, and school-based intervention, particularly among primary school students who may have limited emotional regulation and help-seeking skills.

Despite increasing attention to NSSI, culturally appropriate intervention modules for Malaysian primary school students remain limited. Many existing interventions are developed within Western contexts and may not fully address the developmental, emotional, family, school, and sociocultural needs of Malaysian children. Therefore, this study introduces the MIND-SET Intervention Module, which integrates Motivational Interviewing (MI) and Rational Emotive Behavior Therapy (REBT) to support emotional regulation, cognitive restructuring, and readiness for behavioural change among students involved in NSSI behaviour.

MI is incorporated to enhance readiness for change, reduce ambivalence, and strengthen intrinsic motivation toward healthier coping behaviours. REBT is used to help participants identify irrational beliefs, challenge maladaptive thinking patterns, and develop healthier emotional and behavioural responses. The integration of MI and REBT is expected to provide a structured, supportive, and developmentally appropriate intervention for school counselling settings.

This study will employ a quasi-experimental pre-test, post-test, and follow-up design involving three groups. Approximately 105 primary school students aged 12 years from selected schools in Kedah, Malaysia, will participate in the study. Participants will be identified through school mental health screening and NSSI-related assessment procedures. The treatment group will receive the MIND-SET Intervention Module through structured group counselling sessions. The active comparator group will receive the PRISMA Mental Health Module developed by the Ministry of Education Malaysia. The treatment-as-usual group will continue receiving routine school support and normal school activities without participating in any structured intervention module during the study period.

Data will be collected at three time points: pre-intervention, post-intervention, and follow-up assessment. The study will evaluate changes in NSSI frequency, emotional dysregulation, and readiness for change using validated psychological instruments. Quantitative data analysis will be conducted to examine the feasibility and preliminary effects of the intervention across the three groups.

The findings are expected to contribute to the development of evidence-informed and culturally responsive school-based mental health interventions for Malaysian children. In addition, this study may provide practical guidance for school counsellors, educators, and policymakers in strengthening early intervention efforts related to emotional wellbeing and self-injurious behaviour among primary school students

Inclusion Criteria:

• Primary school students aged 12 years old.
• Students identified with Non-Suicidal Self-Injury (NSSI) behaviour through school mental health screening and assessment procedures.
• Able to understand and participate in group counselling sessions.
• Written informed consent obtained from parents or guardians.
• Assent obtained from participating students.

Exclusion Criteria:

• Students currently receiving intensive psychiatric treatment or psychological -intervention for severe mental health conditions.
• Students identified with active suicidal intent requiring immediate clinical intervention.
• Students with severe cognitive or developmental impairments that may interfere with participation in group intervention activities.
• Students who are unable to attend the scheduled intervention sessions consistently.

The individual participant data (IPD) generated during this study involve highly sensitive psychological and behavioral information from primary school students, including Non-Suicidal Self-Injury (NSSI)-related data. Due to strict ethical considerations, participant confidentiality protection, and institutional data protection policies, individual participant data sets will not be made publicly available to external researchers.

This study uses an open-label design because participants and facilitators will be aware of the intervention received during the implementation of the school-based counselling module.