Effects of task characteristics on unimanual and bimanual movement times.
Fitts' law cannot be used to predict movement times (MTs) of bimanual tasks since no empirical relationships associating task difficulty and bimanual MT have been demonstrated yet. Development of a ‘bimanual task difficulty index’ has been challenged by the complex patterns of coordination involved...
| Publicado en: | Ergonomics Vol. 56; no. 4; pp. 612 - 623 |
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| Autores principales: | , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Apr2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104282903&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104282903 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00140139 ERO jtl: Ergonomics issn: 00140139 maglogo: Y pubinfo: dt: Apr2013 vid: 56 iid: 4 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 104282903 87374280 10.1080/00140139.2012.750383 NLM23379907 104282903 ppf: 612 ppct: 11 formats: tig: atl: Effects of task characteristics on unimanual and bimanual movement times. aug: au: Srinivasan, Divya Martin, Bernard J. Reed, Matthew P. affil: Department of Industrial and Operations Engineering , University of Michigan , Ann Arbor , MI , USA; Department of Occupational and Public Health Sciences , Centre for Musculoskeletal Research, University of Gavle , 80176 , Gavle , Sweden sug: subj: Movement Ergonomics Task Performance and Analysis Hand Human Visual Perception Female Male Adult Eye Movements Videorecording Repeated Measures Analysis of Variance Adult: 19-44 years Female Male ab: Fitts' law cannot be used to predict movement times (MTs) of bimanual tasks since no empirical relationships associating task difficulty and bimanual MT have been demonstrated yet. Development of a ‘bimanual task difficulty index’ has been challenged by the complex patterns of coordination involved in simultaneously performing two tasks, one with each hand, under a control system with limited visual and attentional resources. To address this fundamental issue in human motor performance, bimanual object transfers with the left and right hands to targets of various precision requirements and separated by different distances were studied in six healthy subjects. Visual resource allocation during task performance was used to identify ‘primary’ and ‘secondary’ hand movements in bimanual tasks. While the primary movement was similar to a unimanual movement, the secondary MT varied with its own, as well as the contralateral hand's task constraints. These results, which were stable and consistent across six subjects, provide preliminary evidence that visual behaviour, indicating closed-loop control, can be used to systematically derive bimanual MTs. Practitioner summary: A simple extension of Fitts' law cannot be used to predict movement times (MTs) of bimanual tasks since there is no consensus on the definition of a ‘bimanual task difficulty index’ in the literature. In this paper, we have approached this problem by using visual resource allocation patterns to systematically derive bimanual MTs. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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