A Comparative Evaluation of Finger and Pen Stroke Gestures
Venue
ACM CHI 2012 Conference on Human Factors in Computing Systems, ACM, Austin, TX, pp. 1287-1296
Publication Year
2012
Authors
Huawei Tu, Xiangshi Ren, Shumin Zhai
BibTeX
Abstract
This paper reports an empirical investigation in which participants produced a set
of stroke gestures with varying degrees of complexity and in different target sizes
using both the finger and the pen. The recorded gestures were then analyzed
according to multiple measures characterizing many aspects of stroke gestures. Our
findings were as follows: (1) Finger drawn gestures were quite different to pen
drawn gestures in basic measures including size ratio and average speed. Finger
drawn gestures tended to be larger and faster than pen drawn gestures. They also
differed in shape geometry as measured by, for example, aperture of closed
gestures, corner shape distance and intersecting points deviation; (2) Pen drawn
gestures and finger drawn gestures were similar in several measures including
articulation time, indicative angle difference, axial symmetry and proportional
shape distance; (3) There were interaction effects between gesture implement
(finger vs. pen) and target gesture size and gesture complexity. Our findings show
that half of the features we tested were performed well enough by the finger. This
finding suggests that "finger friendly" systems should exploit these features when
designing finger interfaces and avoid using the other features in which the finger
does not perform as well as the pen.
