Aging is marked by changes in motor control which may be expected to affect performance using computer pointing devices. In this experiment, we compared older and younger adults' ability to acquire on-screen targets of ...

Throughput (TP) is a global measure of input device efficiency but provides little information about user's movement behavior when interacting with a device. Psychomotor models of movement provide a framework from which ...

Modern tools often separate the visual and physical aspects of operation, requiring users to manipulate an instrument while viewing the results indirectly on a display. This can pose usability challenges particularly in ...

This study investigated age-related differences in user performance and preferences using two widely available computer pointing devices, a mouse and trackball. Participants acquired on-screen targets of varying distance ...

The purpose of this study is to report normative values of the amplitude of joint wrist motions and grip strength in older age groups. Volunteers, (N=147) were divided into four age groups, 60-69, 70-79,80-89 and 90+ years, ...

Recent work has emphasized the distinction between task and effector constraints underlying performance in Fitts' type discrete pointing tasks. We explored the relative contributions of these constraints in a cursor-pointing ...

One of the primary challenges confronting designers of mobile computing devices is the issue of efficient text entry. One potential solution is to group multiple letters onto single keys, similar to the T9 keyboard currently ...

This study examined the effects of aging on performance and preferences for two computer pointing devices (e.g. mouse and trackball). Participants made simple point-and-click and click-and-drag movements to targets of ...

Imagery practice of motor tasks has been recommended for a wide range of activities as from flight training to basketball. A key question, both from a practical and a theoretical standpoint, is when during the learning ...