1 User-Driven IT Innovation, Department of People and Technology, Roskilde University2 The Department of Communication, Business and Information Technologies, Roskilde University3 Designing Human Technologies, Administration Department of Roskilde University, Roskilde University4 Københavns Universitet
In point-and-click interfaces the location of targets is sometimes known to the user before visually identifying it, and sometimes not. This experiment investigates how pointing is affected by whether the target location is precued so that users know it in advance or non-precued so that users learn it only at the onset of pointing trials. We investigate this for young, adult, and elderly participants pointing with mouse and touchpad. Target precuing affects the trial completion time, the reaction time, the sheer movement time, and multiple movement kinematics. In addition, target precuing interacts with the use of either mouse or touchpad, with target distance, and with target size, but surprisingly little with participant age. Because the target location was always made known to participants no later than at the onset of the pointing trial, the effects of target precuing must be due to the different possibilities for mental and motor preparations.
International Journal of Human-computer Interaction, 2013, Vol 29, Issue 5, p. 338-350
target precuing; pointing movements; mouse; touchpad; tapping tests; Fitts’s law