The Aachen Life Quality Inventory (ALQI) is a psychological assessment tool developed to measure the subjective quality of life of individuals. It was developed by Prof. Dr. Günter Krampen at the Institute of Psychology at RWTH Aachen University in Germany.

The ALQI consists of a questionnaire designed to assess various domains of life quality, including physical health, psychological well-being, social relationships, environmental factors, and overall satisfaction with life. It is based on the concept that quality of life is a multidimensional construct that encompasses both objective and subjective factors.

The questionnaire typically asks respondents to rate their satisfaction with different aspects of their life using a Likert scale or similar response format. The responses are then scored to generate an overall measure of life quality as well as scores for specific domains.

The ALQI is used in both clinical and research settings to assess the impact of interventions, treatments, or life circumstances on individuals' subjective well-being and quality of life. It can also be used to identify areas of life that may be particularly important to target in interventions aimed at improving overall well-being.

Overall, the Aachen Life Quality Inventory provides a structured and comprehensive way to assess individuals' perceptions of their quality of life across various domains, offering valuable insights into their subjective experiences and satisfaction with life.