Multi-touch tablets afford various support positions and can accommodate interaction with the thumbs and multiple fingers from both hands. However, today’s touch gesture design for tablets generally does not consider the effects of such a diversity of interactions. Therefore, we conducted a user-elicited study by asking participants to create touch gestures to perform interactive tasks in three common tablet-holding postures respectively (i.e. two-handed palm support, one-handed palm support and one-handed forearm support). In all, 1323 gestures for 30 common tasks were logged and analyzed. Our main findings are: (1) In general, user-designed gestures were quite alike for one-handed palm support and forearm support; (2) for commands such as target-position-related ones (e.g. “select single or group (center area of the screen)”) and target-movement-related ones (e.g. “move a lot (left to right) / (right to left)” and “move a little (center area of the screen)”), two-handed support and one-handed supports led to different user-defined gesture performances; (3) the effects of tablet holding postures on users’ mental models varied in referents being executed by defined gestures. We also present a complete user-defined gesture set, quantitative agreement rates and practical implications for gesture design on tablets.

多点触控平板电脑提供各种支撑位置，并且可以适应双手的拇指和多个手指的交互。但是，当今的平板电脑触摸手势设计通常不会考虑这种交互作用的影响。因此，我们通过要求参与者创建触摸手势来分别以三种常见的平板电脑握持姿势（即双手掌托，单手掌托和单手前臂托持）执行交互任务，从而进行了用户引发的研究。总共记录并分析了30个常见任务的1323个手势。我们的主要发现是：（1）通常，用户设计的手势对于单手手掌支撑和前臂支撑非常相似；（2）用于与目标位置相关的命令（例如，“选择单个或组（屏幕的中央区域）”）和与目标移动相关的对象（例如，“移动很多（从左至右）/（从右到左）”）和“移动一点（在屏幕的中央区域） ）”），双手支撑和单手支撑导致不同的用户定义手势性能；（3）平板电脑握持姿势对用户心理模型的影响因被定义手势执行的被指对象而异。我们还为平板电脑上的手势设计提供了完整的用户定义手势集，定量同意率以及实际含义。（3）平板电脑握持姿势对用户心理模型的影响因被定义手势执行的被指对象而异。我们还为平板电脑上的手势设计提供了完整的用户定义手势集，定量同意率以及实际含义。（3）平板电脑握持姿势对用户心理模型的影响因被定义手势执行的被指对象而异。我们还为平板电脑上的手势设计提供了完整的用户定义手势集，定量同意率以及实际含义。