Fig. 2

Study protocol: Quantitative (green) and qualitative (yellow) measures were used to assess the short-term usability of the RELab tenoexo in two sessions. Session 1 consisted of a tryout of the RHO, interviews, and a standardized questionnaire (i.e., SUS). Group A discontinued the study after session 1, while group B attended an extended session 2. In session 2, the participants performed the ARAT with and without RELab tenoexo (randomized order) and provided additional feedback (i.e., in interviews, SUS, and CUQ)