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Effects of target location, stature and hand grip type on in-vehicle reach discomfort

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In order to improve car interior design, data of perceived discomfort and reach posture were collected for 75 different target locations. Altogether, 24 males and females of different statures participated in the experiment. In addition to three-finger grip, index fingertip reach and five finger grip were also compared. The effects of target location, stature and hand grip on reach discomfort were analysed. Predictive regression equations were provided. In addition to the confirmation of target location effects, the results showed that seat back and steering wheel affected discomfort. Their effects differed according to the subject's anthropometry. A detailed analysis of possible interference between the car interior and reach movement showed that short females were more likely impeded by the seat back when a target was close to the body. A significant difference between three hand grip types could be explained by the change of hand reach distance when changing hand grip type. Statement of Relevance: The present study analysed the effects of target location, stature and hand grip type on reach discomfort, based on the statistical analysis of subjective ratings when reaching a target in a vehicle. The results would help to optimise the location of automotive controls for improving car interior design.
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Keywords: automotive; discomfort; posture; reach

Document Type: Research Article

Affiliations: 1: Universite de Lyon, F-69622, Lyon, France; IFSTTAR, UMR_T9406, LBMC, Bron; Universite Lyon 1, Villeurbanne, France 2: Renault SAS, Service Facteur Human, Conduite et Vie Abord, Guyancourt, France

Publication date: May 1, 2011

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