Henning Brau

Anticipatory movement compatibility for virtual reality interaction devices

In the present study, we examined the impact of movement compatibility on the usability of two interaction devices for virtual reality (VR). To this end, we compared performance with the isometric spacemouse with that with the isotonic flystick, assuming that the flystick induces more movement compatibility in continuous movement and thus results in better performance. In the study, 28 subjects performed an object rotation task on a holobench with the two devices. Additionally, rotation axis and rotation degree were varied. Results showed a notable advantage for the flystick with regard to handling time (the time from the beginning of the objects appearance until the end of rotation, determined by subjects). The data support the idea that the compatibility of motor movements with the resulting (i.e. anticipated) object movements is an important determinant of usability in VR environments.

Creation of a Short Version of the User Experience Questionnaire UEQ

Abstract This article focuses on the creation of a short version of the User Experience Questionnaire (UEQ). The goal is to reduce the number of 26 items significantly, allowing more efficient measurement of a product’s user experience (UX) while sustaining the high reliability and validity of the original questionnaire. The shortening will be based on a data set from a company in the home appliance industry which included 1534 participants. A reliable short version of the quantitative measuring instrument was developed using factor and reliability analyzes. This new version comprises only 11 items, has a high reliability and covers all dimensions of the original instrument. Correlations between the dimensions of the UX and various questions regarding user satisfaction indicate a high criterion validity of the UEQ short version. This new short version can help prevent participant fatigue during a test session when repeated application of the questionnaire is necessary to account for testing of multiple prototypes.