The strategy for selecting a minute target and the minute maximum value on a pen-based computer

Authors:
Xiangshi Ren;Shinji Moriya
Affiliations:
Tokyo Denki University, Chiyoda-ku Tokyo, Japan;Tokyo Denki University, Chiyoda-ku Tokyo, Japan
Venue:
CHI EA '97 CHI '97 Extended Abstracts on Human Factors in Computing Systems
Year:
1997

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Abstract

This study deals with the relations between target-pointing strategies and target sizes. An evaluation experiment was performed in which the experimental system changed each of five kinds of targets (1, 3, 5, 7 and 9 dots in diameter respectively, 0.36 mm per dot) and eight directions of penmovement, while using each of six kinds of strategies of approaching the target on a pen-based computer. Two results were obtained: (1) The "Land-on2" strategy was found to be the best strategy for selecting a minute target among the six strategies, in terms of error rates, selection time and subjective evaluation. (2) This study also clarified a boundary value of target which controlled difficulty of strategy. When a target is less than 5 dots (1.80 mm), it is necessary to pay attention to the determination of the strategy in the software design.