Abstract
Fitts’ Law is a famous and highly satisfactory model to predict movement times in ergonomic studies. The original Fitts’ Law only considers one-dimensional movements. In the field of human-computer interaction however one has to deal with at least two dimensions. Due to inconsistency in previous research concerning the integration of the motion angle into the Fitts’ formulation, we investigated the influence of this factor on movement times and errors systematically. 30 subjects, separated in two age groups (younger: 21-36 years, elderly: 58-77 years) were tested in executing a pointing task on a large touch screen. The results reveal that the motion angle has a sinusoidal effect on the movement time for both age groups. Subsequently Fitts’ Law was refined by an additional summand which is an explicit sine function of the motion angle. Based on our findings we give practical recommendations where to arrange information elements on large touch screens.
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Boritz, J., Booth, K.S., Cowan, W.B.: Fitts’ law studies of directional mouse movement. In: Proceedings of Graphics Interface, pp. 216–223. Canadian Information Processing Society, Toronto (1991)
Card, S.K., English, W.K., Burr, B.J.: Evaluation of mouse, rate-controlled isometric joy-stick, step keys, and text keys for text selection on a CRT. Ergonomics 21, 601–623 (1978)
Dietz, P., Leigh, D.: Diamondtouch: a multi-user touch technology. In: Proceedings of the ACM Symposium on User Interface Software and Technology, New York, pp. 219–226 (2001)
DIN 33402-2: Ergonomie Körpermaße des Menschen Teil 2: Werte, Deutsche Fassung EN ISO 33402-2 (2005) (in German)
Du, J., Shi, H., Yuan, X.-g.: Modeling of human’s pointing movement on the effect of target position. In: Duffy, V.G. (ed.) HCII 2007 and DHM 2007. LNCS, vol. 4561, pp. 48–55. Springer, Heidelberg (2007)
Field, A., Hole, G.: How to Design and Report Experiments. Sage Publications, Thousand Oaks (2007)
Field, A.: Discovering Statistics Using SPSS. Sage Publications, Thousand Oaks (2009)
Fitts, P.M.: The information capacity of the human motor system in controlling the ampli-tude of movement. Journal of Experimental Psychology 47, 381–391 (1954)
Iwase, H., Murata, A.: Empirical study on improvement of usability for touch-panel for elderly - comparison of usability between touch-panel and mouse. In: IEEE International Conference on Systems, Man, and Cybernetics, pp. 252–257 (2002)
Jochems, N.: Altersdifferenzierte Gestaltung der Mensch-Rechner-Interaktion am Beispiel von Projektmanagementaufgaben. Dissertation RWTH Aachen, Shaker, Aachen (2010) (in German)
Luczak, H., Schlick, C., Jochems, N., Vetter, S., Kausch, B.: Touch Screens for the Elderly: Some Models and Methods, Prototypical Development and Experimental Evaluation of Human-Computer Interaction Concepts for the Elderly. In: Haftor, D., Mirijamdotter, A. (eds.) Information and Communication Technologies, Society and Human Beings: Theory and Framework, ch. 11, pp. 116–135. IGI Global, Hershey (2010)
MacKenzie, I.S., Buxton, W.: Extending Fitts’ law to two-dimensional tasks. In: Proceedings of the ACM Conference on Human Factors in Computing Systems - CHI 1992, pp. 219–226. ACM, New York (1992)
Murata, A., Iwase, H.: Usability of touch-panel interfaces for older adults. Human Factors 47, 766–776 (2005)
Pak, R., McLaughlin, A.C., Lin, C.C., Rogers, W.A., Fisk, A.D.: An age-related comparison of a touch screen and a novel input device. In: Proceedings of the Human Factors and Ergonomics Society 45th Annual Meeting, pp. 189–192. Santa Monica, CA (2002)
Rau, P.P., Hsu, J.: Interaction devices and web design for novice older users. Educational Gerontology 31(1), 19–40 (2005)
Whisenand, T.G., Emurian, H.H.: Analysis of cursor movements with a mouse. Computers in Human Behavior 15, 85–103 (1999)
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Vetter, S., Bützler, J., Jochems, N., Schlick, C.M. (2011). Fitts’ Law in Bivariate Pointing on Large Touch Screens: Age-Differentiated Analysis of Motion Angle Effects on Movement Times and Error Rates. In: Stephanidis, C. (eds) Universal Access in Human-Computer Interaction. Users Diversity. UAHCI 2011. Lecture Notes in Computer Science, vol 6766. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21663-3_67
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DOI: https://doi.org/10.1007/978-3-642-21663-3_67
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