| 1. |
- Blomkvist, Anna-Christina, et al.
(författare)
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Computer usage with cold hands : an experiment with pointing devices
- 2000
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Ingår i: International Journal of Occupational Safety and Ergonomics. - : Informa UK Limited. - 1080-3548 .- 2376-9130. ; 6:4, s. 429-450
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Tidskriftsartikel (refereegranskat)abstract
- Computers are used in the outdoors and in connection with cold store work. Cold hand and fingers limit data input, as studied here. Six input devices; trackballs, pens, and a mouse were tested by 19 participants in a Fitts' target acquisition task with 2 target sizes under 2 experimental conditions; warm and cold right hand. Measures were acquisition times, number of errors, participant's preferences, and observed handling of the devices. Effects of device, target size, and cold were significant. Learning and attempts to improve handgrip were confirmed. Large enough targets, a thick pen, and a mouse make computer work practicable in the cold. Direct visual feedback, as with pen on template with target images, shortened acquisition times by half a second.
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| 2. |
- Blomkvist, Anna-Christina, et al.
(författare)
-
Computer use in cold environments
- 2000
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Ingår i: Applied Ergonomics. - 0003-6870 .- 1872-9126. ; 31:3, s. 239-245
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Tidskriftsartikel (refereegranskat)abstract
- This study addresses computer work in cold environments with the two-fold aim to explore conditions for such work, and to add knowledge about the use of fingers at data entry in the cold. Five workplaces were visited and work contents and use of computers are briefly described. Effects of work in the cold were in line with those mentioned in the literature, and manual lifting of heavy goods the most impairing activity. Subjects contended with strenuous working postures--holding the computers in their hands or arms--and with cold fingers. Individual fingering for data input was noted. Forefinger or a pen were used, and a pen is recommendable for input, either as a touch pen or, simply to press the keys. A supportive rack could be recommended for portable workstations.
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