The paper by Kim L. Gratz addresses the lack of consensus and standardized measures in defining and measuring deliberate self-harm (DSH), a behavior that has gained increasing attention from clinical researchers. DSH is defined as the deliberate, direct destruction or alteration of body tissue without conscious suicidal intent, resulting in severe enough injury to cause tissue damage. The study introduces the Deliberate Self-Harm Inventory (DSHI), a newly developed measure, and presents preliminary psychometric data. One hundred and fifty participants from undergraduate psychology courses completed the DSHI, with 93 participants recompleted the inventory after 2-4 weeks. The DSHI demonstrated high internal consistency, adequate construct, convergent, and discriminant validity, and test-retest reliability. The paper also reviews various conceptual and operational definitions of DSH, emphasizing the need for clear and clinically useful definitions to advance research in this area.The paper by Kim L. Gratz addresses the lack of consensus and standardized measures in defining and measuring deliberate self-harm (DSH), a behavior that has gained increasing attention from clinical researchers. DSH is defined as the deliberate, direct destruction or alteration of body tissue without conscious suicidal intent, resulting in severe enough injury to cause tissue damage. The study introduces the Deliberate Self-Harm Inventory (DSHI), a newly developed measure, and presents preliminary psychometric data. One hundred and fifty participants from undergraduate psychology courses completed the DSHI, with 93 participants recompleted the inventory after 2-4 weeks. The DSHI demonstrated high internal consistency, adequate construct, convergent, and discriminant validity, and test-retest reliability. The paper also reviews various conceptual and operational definitions of DSH, emphasizing the need for clear and clinically useful definitions to advance research in this area.