Show me the direction – how accurate does it have to be?

In English One factor which can be expected to influence performance in applications where the user is expected to point a device in some direction to obtain information is the angle interval in which the user gets feedback. The present study was performed in order to get a better understanding of the influence of this angle interval on navigation performance. Results indicate that users are able to handle quite a wide range of angle intervals, although very narrow and very wide are less suitable.