The Quality of Life Enjoyment and Satisfaction Questionnaire (Q-LES-Q©) is a comprehensive, validated psychiatric assessment instrument developed by Dr. Jean Endicott at Columbia University. This self-administered questionnaire measures the degree...
Professional Assessment Tools for Psychiatric Research
Our collection of licensable psychiatric rating scales represents decades of rigorous validation and clinical application. Each scale has been extensively tested across diverse populations and is trusted by leading research institutions, pharmaceutical companies, and clinical practitioners worldwide.
These validated instruments provide the scientific rigor and regulatory acceptance required for clinical trials, outcome research, and evidence-based practice in psychiatric medicine.
Available Rating Scales
Professional licensing available for qualified organizations and research institutions.
The Quality of Life Enjoyment and Satisfaction Questionnaire – Short Form (Q-LES-Q-SF)© represents a streamlined version of the original Q-LES-Q, specifically designed for efficient clinical practice and research applications. This...
The Quality of Life Enjoyment and Satisfaction Questionnaire – 18 (Q-LES-Q-18)© represents a strategically abbreviated version of the original Q-LES-Q, specifically developed by Ritsner and colleagues for enhanced clinical utility...
The Pediatric Quality of Life Enjoyment and Satisfaction Questionnaire (PQ-LES-Q)© represents a specialized adaptation of the adult Q-LES-Q, specifically designed to assess quality of life in children and adolescents. This...
The Geriatric Depression Scale Short Version (GDS-SV)© represents a streamlined adaptation of the original 30-item Geriatric Depression Scale, specifically developed by Sheikh and Yesavage to provide efficient depression screening in...
The Geriatric Depression Scale Long Form (GDS-30)© represents the original and most comprehensive version of the internationally recognized geriatric depression assessment instrument, developed by Brink, Yesavage, and colleagues in 1982....
