Jurnal Psikologi Volume 50, Number 2, 2023: 125– 140 DOI: 10.22146/jpsi.83712 ISSN 0215-8884 (print) ISSN 2460 867X (Online) The Indonesian Version of the Depressive Symptom Index-Suicidality Subscale: Adaptation and Psychometric Evaluation Lavenda Geshica * 1 , Ferdi W. Djajadisastra 2 , Sugiarti 3 , 1 Faculty of Psychology, Universitas Gadjah Mada, Indonesia 2 National Centre for Epidemiology and Population Health, Australian National University, Australia 3 Faculty of Psychology, Universitas Indonesia, Indonesia Submission 7 April 2023 Accepted 31 August 2023 Published 30 August 2023 Abstract. Suicide is a severe health problem currently a global concern that causes approximately 703,000 deaths each year. 75% of suicide occurs at productive age, with university students as subgroups that are prone to experience suicidal thoughts and behaviors. This study aimed to adapt Depressive Symptom Index- Suicidality Subscale (DSI-SS) into the Indonesian language and evaluate its psychometric properties. The International Test Commission (ITC) requirements were used as a reference in the adaptation process. Moreover, to evaluate the psychometric properties, 510 university students from various regions in Indonesia participated in this study. The result showed that the DSI-SS Indonesia version has good psychometric properties. The corrected item-total correlation ranged from 0.837-0.872, with an alpha reliability coefficient of 0.936. The DSI-SS highly correlated with a test that evaluates depression symptoms (the PHQ-9) and a history of suicide attempts. The exploratory factor analysis also supports the validity evidence, indicating that the DSI-SS is a unidimensional scale. Keywords: DSI-SS; measurement; suicide; university students Data from World Health Organization (2021) estimated that in 2019 approximately 703,000 people died by suicide. Furthermore, suicide was the fourth leading cause of death among youth aged 15-29 years for both sexes. In Indonesia, approximately 6,544 individuals died due to suicide in 2019. Moreover, a survey conducted by (Prawira et al., 2021) revealed that 19.65% of participants aged 18-24 perceived that they would rather die and wanted to hurt themselves over the past two weeks. University students are one of the subgroups that are prone to experience suicidal thoughts and behaviors (O’Neill et al., 2018) due to several demands and problems disturbing their psychological well-being. For example, a study by Richardson et al. (2017) found that financial strain correlates with poor mental health and suicidal behavior, particularly for those with lower emotional functioning (Bahmani et al., 2018). Moreover, Logan and Burns (2021) identify distinct factors associated with university students’ psychological distress that can lead to suicidality, such as lack of balance in different aspects of life (study, health, relationship), new responsibilities such as independent adults (managing finances, decision making, household management), interpersonal conflict, and * Address for correspondence: lavendageshica@ugm.ac.id 125 JURNAL PSIKOLOGI