BACKGROUND

From a human-centred design perspective, the web-based tool 'Helder in Gesprek' (Clear in Conversation) has recently been developed to improve person-centred communication in the memory clinic. The aim was to conduct expert testing to identify potential usability issues prior to user-testing and propose corresponding re-design recommendations.

METHODS

The DEMIGNED principles, specifically developed to identify potential usability issues for people with dementia, are used during the expert evaluation. Five experts ( = 1 usability,  = 2 dementia,  = 2 double-experts) used a heuristic evaluation approach applying the DEMIGNED principles to assess the user-interface (navigation structure, lay-out, and interaction) of 'Helder in Gesprek'. Through deductive and inductive analysis, a unique set of potential usability problems were identified.

RESULTS

Applying the DEMIGNED principles led to the discovery of 42 unique usability problems, related to cognitive principles ( = 14), perception principles ( = 8), frame of mind principles ( = 8), speech and language principles ( = 3), or multiple principles ( = 9). The mean severity score was 2.32 (SD = 0.85).

CONCLUSION

We identified several unique usability problems across a variety of DEMIGNED principles before usability testing with actual end-users that need to be addressed during re-design. Designers, researchers, clinicians, and policy makers may use these results to improve the usability of web-based tools, thus improving person-centred communication in the memory clinic for people with cognitive complaints.