Using Repeated Single-Criterion Card Sorting to Elicit User Perceptions and Constructs v1

This protocol describes how to apply repeated single-criterion card sorting (Rugg and McGeorge, 1997) to uncover how individuals categorise a set of items - such as images, physical objects, or text descriptions -using their own constructs. The process involves participants sorting the same set of cards multiple times, each with a different criterion of their choosing. This method is useful in user research, education, design, and other domains where understanding personal classification systems or mental models is important.