At the beginning of a usability study, the moderator establishes a very strong rapport with the participants. As a result, the participants provide only positive feedback on the design prototype. What type of bias are the study participants displaying?

UX/UI research is a systematic study of a product's target audience to address their needs and goals through design. It is the search, testing, improvement, and implementation of practical solutions that will serve as business benefits.

The UX/UI research process includes information gathering, interviews, etc.