User Experience of Alexa when controlling music: comparison of face and construct validity of four questionnaires

We evaluate the user experience (UX) of Amazon's Alexa when users play and control music. For measuring UX we use established UX metrics (SASSI, SUISQ-R, SUS, AttrakDiff). We investigated face validity by asking users to rate how well they think a questionnaire measures what it is supposed to measure and we assessed construct validity by correlating UX scores of questionnaires with each other. We find a mismatch between face and construct validity of the evaluated questionnaires. Specifically, users feel that SASSI represents their experience better than other questionnaires, however this is not supported by correlations between questionnaires, which suggest that all investigated questionnaires measure UX to a similar extent. Importantly, the fact that face validity and construct validity diverge is not surprising as this has been observed before. Our work adds to existing literature by providing face and construct validity scores of UX questionnaires for interactions with the common speech assistant Alexa.