Clinical applications of the Defense Mechanisms Rating Scale-Self-Report-30: a systematic review of the first five years

Defense mechanisms are automatic psychological processes that regulate emotional conflicts and modulate adaptation to internal and external stressors. As implicit components of emotion regulation, they play a transdiagnostic role across psychological and physical domains of health. Among the available instruments, the Defense Mechanisms Rating Scales-Self-Report-30 (DMRS-SR-30) directly operationalizes the hierarchical model of defenses, widely considered the gold standard framework for their empirical assessment. This systematic review aimed to synthesize findings from all studies that had employed the DMRS-SR-30 to date, summarizing its psychometric properties, domains of application, and clinical implications. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a systematic search was conducted across PubMed, Scopus, and Web of Science databases. Eligible studies were full-text peer-reviewed articles written in English employing the DMRS-SR-30. Risk of bias was assessed according to study design using an established quality appraisal tool. Twenty-six studies met the inclusion criteria. The main domains of application were medical conditions, mental health and psychopathology, personality, and stress-related adjustment. Across these research areas, mature defenses were consistently associated with adaptive functioning and resilience, whereas immature and neurotic defenses predicted higher psychological distress, maladjustment, and psychopathology. The findings from the validation studies demonstrated that the scale exhibited robust reliability, construct validity, and clinical sensitivity. The DMRS-SR-30 provides a valid, efficient, and clinically meaningful method to assess the full hierarchy of defense mechanisms through a self-report tool. Its overall defensive functioning (ODF) index may offer an integrative measure of adaptive capacity that can complement standard psychodiagnostic and medical evaluations. Incorporating the assessment of defensive functioning can enhance the holistic understanding of patients, improve compliance with treatment, and promote person-centered care within mind-body health contexts.