The Big Five Inventory (BFI) is a widely-used 44-item questionnaire designed to assess the five core personality traits: extraversion, agreeableness, conscientiousness, neuroticism, and openness.
The Zung Self-Rating Depression Scale (SDS) is a widely used 20-item measure for assessing depression severity, guiding treatment, and supporting mental health research.
The Leeds Dependence Questionnaire (LDQ) is a validated tool for measuring substance dependence severity, offering clinical insight and research value across diverse treatment populations.
The Pain Catastrophizing Scale (PCS) assesses catastrophic thinking related to pain, including rumination, magnification, and helplessness. It is crucial for researchers and clinicians.9