Chien-Hsiou Liu, Shih-Chen Fan; Ergonomic Design of a Computer Mouse for Clients With Wrist Splints. Am J Occup Ther 2014;68(3):317-324. doi: 10.5014/ajot.2014.009928.
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OBJECTIVE. We explored effects of cutaneous feedback and hump position on efficiency and comfort in mouse use with a splint. We also analyzed the relationship between anthropometric measurements (width of hand and length of hand, palm, and index) and the task performance.
METHOD. Thirty participants performed a computer task with two forms of mice (front hump and rear hump) and two kinds of wrist splints (dorsal and volar). Movement time and satisfaction scores were recorded.
RESULTS. No interaction effect (Hump Position × Splint Type) was found on movement time. Movement time was shorter for rear-hump mouse users than for front-hump mouse users. Movement time was also shorter for wearers of dorsal wrist splints than for wearers of volar wrist splints. Limited differences existed in the satisfaction scores. Participants with a longer index finger had shorter movement time.
CONCLUSION. Both dorsal wrist splints and rear-hump mice are recommended. Length of index finger positively correlated with task performance.
Do dorsal-based wrist splints and front-hump mice enhance computer task efficiency and comfort?
What kind of relationship exists between the anthropometry measurements and computer task efficiency?
Efficiency: movement time (time needed to complete a set of mouse tasks)
Satisfaction: scores on the Quebec User Evaluation of Satisfaction With Assistive Technology—Taiwanese (QUEST–T; Mao et al., 2010) questionnaire
Anthropometric measurements: length of hand, length of palm, length of index finger, and width of hand.
If computer tasks are a major daily client activity, clinicians should choose a dorsal wrist splint design and a rear-hump mouse to preserve the cutaneous feedback.
If a volar-based splint is desired, a rear-hump mouse offers a stable rest area for the fingers and facilitates coordination in mouse scrolling and clicking.
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