User experience in HMI: an enhanced assessment model

In recent years, User Experience has become increasingly recognized as an important and determinant factor in the design, development and evaluation in Human-Computer Interaction and Human-Machine Interaction. There are many user experience models reported in the literature to reflect this recognition. However, the industrial interpretation of the term user experience is largely based on traditional User-Centred Design methods and generally does not make a clear distinction of user experience from the perspective of user-centred design and usability. In reality, user experience is still often considered as a synonym of usability and user-centred design. In this paper, we briefly discuss important user experience models reported in the literature in the light of user experience and usability. Based on our analysis, we propose an enhanced usability model that can be used for user experience assessment in human-machine interaction. We also present the results of a pilot study to validate our proposed model and the instrument employed.