Touchscreen Pointing and Swiping: The Effect of Background Cues and Target Visibility

Abstract

<jats:p>By assessing the precision of gestural interactions with touchscreen targets, the authors investigate how the type of gesture, target location, and scene visibility impact movement endpoints. Participants made visually and memory-guided pointing and swiping gestures with a stylus to targets located in a semicircle. Specific differences in aiming errors were identified between swiping and pointing. In particular, participants overshot the target more when swiping than when pointing and swiping endpoints showed a stronger bias toward the oblique than pointing gestures. As expected, the authors also found specific differences between conditions with and without delays. Overall, the authors observed an influence on movement execution from each of the three parameters studied and uncovered that the information used to guide movement appears to be gesture specific.</jats:p>

HearIt: Auditory-Cue-Based Audio Playback Control to Facilitate Information Browsing in Lecture Audio

“…G*Power (http://www.gpower.hhu.de/, accessed on 10 September 2020), a power analysis application, revealed that a sample size of 12 is enough to provide statistical significance with 80% power (1 − β) for large effect size ( f 2 > 0.4) and with an alpha level set at 0.05. In addition, the earlier HCI studies [41,42] used 12 participants to perform a within-subject (repeated measure) experiment to evaluate the task performance with the apparatus.…”