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Analysis of visual performance during the use of mobile devices while walking

: Conradi, Jessica; Alexander, Thomas


Harris, D.:
Engineering Psychology and Cognitive Ergonomics. 11th International Conference, EPCE 2014 : Held as Part of HCI International 2014, Heraklion, Crete, Greece, June 22-27, 2014. Proceedings
Cham: Springer International Publishing, 2014 (Lecture Notes in Computer Science 8532)
ISBN: 978-3-319-07515-0 (Online)
ISBN: 978-3-319-07514-3 (Print)
International Conference on Engineering Psychology and Cognitive Ergonomics (EPCE) <11, 2014, Heraklion>
International Conference on Human-Computer Interaction (HCI International) <16, 2014, Heraklion>
Fraunhofer FKIE ()

Mobile computers and smartphones are often used while their users are walking. From an ergonomic viewpoint, this requires a thorough design of the user interface. Although styleguides provide multiple recommendations there is little known about basic human factors issues. This study provides recommendations for the visual design by analyzing the influence of walking on visual acuity with a mobile computer. N=22 volunteers participated in the experiment comparing visual acuity during standing, slow walking and fast walking. Additional conditions referred to indoor (treadmill) and outdoor (free walking) situations. The results show that walking speed has a highly significant influence on visual acuity. The results are independent of the indoor or outdoor condition. The decrease of visual acuity is similar to a row on a common eye chart. For compensating this decrease, letters and icons on a mobile device should be enlarged by about 20%.