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Evaluating fitts' law performance with a non-ISO task

Published: 25 September 2017 Publication History

Abstract

We used a target-selection task to evaluate head-tracking as an input method on a mobile device. The procedure used a non-ISO Fitts' law task since targets were randomly positioned from trial to trial. Due to a non-constant amplitude within each sequence of trials, throughput was calculated using two methods of data aggregation: by sequence of trials using the mean amplitude and by common A-W conditions. For each data set, we used four methods for calculating throughput. The grand mean for throughput calculated using the division of means and the adjustment for accuracy was 0.74 bps, which is 45% lower than the value obtained using an ISO task. We recommend calculating throughput using the division of means (and not the slope reciprocal from the regression model) and with the adjustment for accuracy. We present design recommendation for non-ISO tasks: Keep amplitude and target width constant within each sequence of trials and use strategies to avoid or remove reaction time.

References

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Apple Inc. 2014. iOS human interface guidelines: Designing for iOS. (Nov. 2014). Retrieved November 11, 2014 from https://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/
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R. W. Bailey. 1996. Human performance engineering: Designing high quality professional user interfaces for computer products, applications and systems (3 ed.). Prentice Hall, Upper Saddle River, NJ.
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P. M. Fitts. 1954. The information capacity of the human motor system in controlling the amplitude of movement. Journal of Experimental Psychology 47, 6 (1954), 381.
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P. M. Fitts and J. R. Peterson. 1964. Information capacity of discrete motor responses. Journal of Experimental Psychology 67, 2 (1964), 103--112.
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N. Henze and S. Boll. 2011. It does not Fitts my data! Analysing large amounts of mobile touch data. In Proceedings of the IFIP Conference on Human-Computer Interaction - INTERACT 2011. Springer, Berlin, 564--567.
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ISO. 2002. 9241-9. 2000. Ergonomics requirements for office work with visual display terminals (VDTs) - Part 9: Requirements for non-keyboard input devices. International Organization for Standardization (2002).
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ISO. 2012. 9241-411. 2012. Ergonomics of human-system interaction - Part 411: Evaluation methods for the design of physical input devices. International Organization for Standardization (2012).
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I. S. MacKenzie. 1992. Fitts' law as a research and design tool in human-computer interaction. Human-Computer Interaction 7, 1 (1992), 91--139.
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I. S. MacKenzie. 2015. Fitts' throughput and the remarkable case of touch-based target selection. In Proceedings of the 17th International Conference on Human-Computer Interaction - HCII 2015. Springer, Switzerland, 238--249.
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K. B. Perry and J. P. Hourcade. 2008. Evaluating one handed thumb tapping on mobile touchscreen devices. In Proceedings of the Graphics Interface 2008 - GI 2008. Canadian Information Processing Society, Toronto, 57--64.
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M. F Roig-Maimó, I. S. MacKenzie, C. Manresa-Yee, and J. Varona. Submitted. Head-tracking interfaces on mobile devices: Evaluation using Fitts' law and a new multi-directional corner task for small displays. International Journal of Human-Computer Studies (Submitted).
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M. F. Roig-Maimó, J. Varona Gómez, and C. Manresa-Yee. 2015. Face Me! Head-tracker interface evaluation on mobile devices. In Proceedings of the 33rd Annual ACM Conference Extended Abstracts on Human Factors in Computing Systems - CHI 2015. ACM, New York, 1573--1578.
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R. W. Soukoreff and I. S. MacKenzie. 2004. Towards a standard for pointing device evaluation: Perspectives on 27 years of Fitts' law research in HCI. International Journal of Human-Computer Studies 61, 6 (2004), 751--789.

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cover image ACM Other conferences
Interacción '17: Proceedings of the XVIII International Conference on Human Computer Interaction
September 2017
268 pages
ISBN:9781450352291
DOI:10.1145/3123818
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 25 September 2017

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Author Tags

  1. ISO 9241-411
  2. fitts' law
  3. head-tracking
  4. mobile HCI
  5. throughput

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Interacción '17

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Overall Acceptance Rate 109 of 163 submissions, 67%

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  • (2024)Kill Two Stacks with One Stone: "Fitts" Yourself while Doing RehabilitationExtended Abstracts of the CHI Conference on Human Factors in Computing Systems10.1145/3613905.3650904(1-7)Online publication date: 11-May-2024
  • (2023)A Dataset and Post-Processing Method for Pointing Device Human-Machine Interface EvaluationJournal of Computer Science and Technology10.24215/16666038.23.e1123:2(e11)Online publication date: 25-Oct-2023
  • (2023)The Benefits of Passive Haptics and Perceptual Manipulation for Extended Reality Interactions in Constrained Passenger SpacesProceedings of the 2023 CHI Conference on Human Factors in Computing Systems10.1145/3544548.3581079(1-19)Online publication date: 19-Apr-2023
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  • (2022)Ability-Based Methods for Personalized Keyboard GenerationMultimodal Technologies and Interaction10.3390/mti60800676:8(67)Online publication date: 3-Aug-2022
  • (2022)Detection of the level of attention in children with ADHD through brain waves and corporal postureJournal of Intelligent & Fuzzy Systems: Applications in Engineering and Technology10.3233/JIFS-21924242:5(4531-4540)Online publication date: 1-Jan-2022
  • (2022)Feasibility of a Device for Gaze Interaction by Visually-Evoked Brain Signals2022 Symposium on Eye Tracking Research and Applications10.1145/3517031.3529232(1-7)Online publication date: 8-Jun-2022
  • (2020)GIMIS: Gaze Input with Motor Imagery SelectionACM Symposium on Eye Tracking Research and Applications10.1145/3379157.3388932(1-10)Online publication date: 2-Jun-2020
  • (2020)Designing and Evaluating Head-based Pointing on Smartphones for People with Motor ImpairmentsProceedings of the 22nd International ACM SIGACCESS Conference on Computers and Accessibility10.1145/3373625.3416994(1-12)Online publication date: 26-Oct-2020
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