Turkish Version of the Usefulness, Satisfaction, and Ease of Use Questionnaire (USE): Reliability and Validity

In recent years, numerous technological products and devices have been developed in rehabilitation through advances in biomedical technology. These innovations support traditional rehabilitation services, offering more effective treatment methods and improving patients' adherence and participation. Increased compliance in treatment positively influences functional status, quality of life, and satisfaction. However, the diversity of biomedical products and the varying strength of their scientific foundations make it critical to evaluate them in terms of benefit, patient compliance, and usability. In physiotherapy and rehabilitation, objective tools for this purpose remain limited, which hinders accurate assessment of product effectiveness and the identification of improvements. Uncertainty regarding usability and ease of use may also result in inefficient utilization of resources. Questionnaires provide cost-effective tools to capture users' opinions, reflecting strengths and weaknesses of a product without the need for measurement devices. The Usefulness, Satisfaction, and Ease of Use (USE) Questionnaire, developed by Arnold Lund in 2001, is a comprehensive 30-item scale scored on a 7-point Likert system. It evaluates usefulness, ease of use, ease of learning, and satisfaction, with items applicable across different products and services such as software, hardware, applications, or user support materials. Its multidimensional structure allows for the evaluation of usability in physiotherapy and rehabilitation technologies as well as in broader fields including robotics, social networking sites, diagnostic tools, and virtual reality. Despite its wide use internationally, no validated Turkish version of the USE Questionnaire exists. Establishing a culturally adapted, valid, and reliable Turkish version will address this gap and provide clinicians and researchers with a standardized tool for usability assessment. The aim of this study is to investigate the validity