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Aging, Motor Control, and the Performance of Computer Mouse Tasks

University of Miami School of Medicine, Miami, Florida

Joseph Sharit

University of Miami School of Medicine, Miami, Florida

Sara J. Czaja

University of Miami School of Medicine, Miami, Florida

Because of the increased presence of computers in work and everyday life and the demographic "graying" of America, there is a need for interface designs that promote accessibility for older people. This study examined age differences in the performance of basic computer mouse control techniques. An additional goal of the study was to examine the influence of age-related changes in psychomotor abilities on mouse control. A total of 60 participants in 3 age groups (20--39 years, 40--59 years, and 60--75 years) performed 4 target acquisition tasks (pointing, clicking, double-clicking, and dragging) using a computer mouse. The data indicated that the older participants had more difficulty performing mouse tasks than the younger participants. Differences in performance attributable to age were found for the more complex tasks (clicking and double-clicking). Furthermore, age-related changes in psychomotor abilities were related to age differences in performance. We discuss applications to computer interface designs. Actual or potential applications of this research include specifications for computer mouse design to accommodate older populations.

Human Factors: The Journal of the Human Factors and Ergonomics Society, Vol. 41, No. 3, 389-396 (1999)
DOI: 10.1518/001872099779611102


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