Evaluative research is a type of research that is used to evaluate the effectiveness, usability, or user experience of a product or service. In UX, evaluative research is often used to assess the quality of a design and identify areas for improvement.

Evaluative research can involve various methods, such as usability testing, heuristic evaluations, or user satisfaction surveys. These methods can provide valuable data on the user experience, and they can help designers understand how well a product or service is working and what areas need improvement.

Evaluative research is often conducted after a product or service has been developed and released, and it can provide feedback on the user experience that can be used to make improvements. Evaluative research can also be used to compare different design options or to evaluate the effectiveness of design changes over time.