Figure 1: Snapshots of the administrative scenario of the AES-risk simulator. Images (a) and (b) show two views of the courtyard, while images (c) and (d) show the offices and the kitchen. Red arrows on the floor indicate a path that should be followed by users. On image (c), an office chair (highlighted in red) was selected by the user because it is in the middle of a corridor. The user understood that the chair represents a risky situation.
AbstractAny human-computer interface imposes a certain level of cognitive load to the user task. Analogously, the task itself also imposes different levels of cognitive load. It is common sense in 3D user interfaces research that a higher number of degrees of freedom increases the interface cognitive load. If the cognitive load is significant, it might compromise the user performance and undermine the evaluation of user skills in a virtual environment. In this paper, we propose an assessment of two immersive VR interfaces with varying degrees of freedom in two VR tasks: risk perception and basic object selection. We examine the effectiveness of both interfaces in these two different tasks. Results show that the number of degrees of freedom does not significantly affect a basic selection task, but it affects risk perception task in an unexpected way.