Fitts' Law in Bivariate Pointing on Large Touch Screens: Age-Differentiated Analysis of Motion Angle Effects on Movement Times and Error Rates

Sebastian Vetter; Jennifer Bützler; Nicole Jochems; Christopher M. Schlick

doi:10.1007/978-3-642-21663-3_67

Fitts' Law in Bivariate Pointing on Large Touch Screens: Age-Differentiated Analysis of Motion Angle Effects on Movement Times and Error Rates

Sebastian Vetter, Jennifer Bützler, Nicole Jochems, Christopher M. Schlick

Institute of Multimedia and Interactive Systems

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.

Original language	English
Title of host publication	Universal Access in Human-Computer Interaction. Users Diversity
Editors	Constantine Stephanidis
Number of pages	9
Volume	6766
Place of Publication	Berlin, Heidelberg
Publisher	Springer Berlin Heidelberg
Publication date	2011
Pages	620-628
ISBN (Print)	978-3-642-21662-6
ISBN (Electronic)	978-3-642-21663-3
DOIs	https://doi.org/10.1007/978-3-642-21663-3_67
Publication status	Published - 2011
Event	6th International Conference on Universal Access in Human-Computer Interaction - Orlando, United States Duration: 09.07.2011 → 14.07.2011

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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 C. Stephanidis (Ed.), Universal Access in Human-Computer Interaction. Users Diversity (Vol. 6766, pp. 620-628). (Lecture Notes in Computer Science ; Vol. 6766). Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-642-21663-3_67

Vetter, Sebastian ; Bützler, Jennifer ; Jochems, Nicole et al. / Fitts' Law in Bivariate Pointing on Large Touch Screens: Age-Differentiated Analysis of Motion Angle Effects on Movement Times and Error Rates. Universal Access in Human-Computer Interaction. Users Diversity. editor / Constantine Stephanidis. Vol. 6766 Berlin, Heidelberg : Springer Berlin Heidelberg, 2011. pp. 620-628 (Lecture Notes in Computer Science ).

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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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Vetter, S, Bützler, J, Jochems, N & Schlick, CM 2011, Fitts' Law in Bivariate Pointing on Large Touch Screens: Age-Differentiated Analysis of Motion Angle Effects on Movement Times and Error Rates. in C Stephanidis (ed.), Universal Access in Human-Computer Interaction. Users Diversity. vol. 6766, Lecture Notes in Computer Science , vol. 6766, Springer Berlin Heidelberg, Berlin, Heidelberg, pp. 620-628, 6th International Conference on Universal Access in Human-Computer Interaction, Orlando, Florida, United States, 09.07.11. https://doi.org/10.1007/978-3-642-21663-3_67

Fitts' Law in Bivariate Pointing on Large Touch Screens: Age-Differentiated Analysis of Motion Angle Effects on Movement Times and Error Rates. / Vetter, Sebastian; Bützler, Jennifer; Jochems, Nicole et al.
Universal Access in Human-Computer Interaction. Users Diversity. ed. / Constantine Stephanidis. Vol. 6766 Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. p. 620-628 (Lecture Notes in Computer Science ; Vol. 6766).

Research output: Chapters in Books/Reports/Conference Proceedings › Conference contribution › peer-review

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Vetter S, Bützler J, Jochems N, Schlick CM. 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, editor, Universal Access in Human-Computer Interaction. Users Diversity. Vol. 6766. Berlin, Heidelberg: Springer Berlin Heidelberg. 2011. p. 620-628. (Lecture Notes in Computer Science ). doi: 10.1007/978-3-642-21663-3_67

Fitts' Law in Bivariate Pointing on Large Touch Screens: Age-Differentiated Analysis of Motion Angle Effects on Movement Times and Error Rates

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