Simulating an extendable tangible slider for eyes-free one-handed interaction on mobile devices

ABSTRACT

Sliders are widely used on mobile devices. Envisioning mobile devices that can dynamically deform to raise tangible controls from the screen surface, tangible sliders offer the benefit of eyes-free interaction. However, reaching for distant values with one hand is problematic: users namely need to change their handgrip, which is not comfortable. To overcome this problem, this paper sets out to experimentally study an extendable tangible slider to support one-handed clutching. The tangible slider's knob extends to maintain the thumb's movement within its comfortable area. We first built a low-fidelity prototype made of a knob long enough to allow clutching. This low-fidelity prototype significantly improves performance when reaching distant targets, as compared to a standard tangible slider. We then built a higher-fidelity prototype, introducing actuation and allowing for a shorter knob. When used for clutching, the knob moves back towards the users' thumb. Experimental results show that the motion of the actuated knob does not interrupt eyes-free interaction during manipulation. In comparison, a graphical extendable slider performed 0.9s slower due to the required visual attention. However, the results suggest that the motion of the actuated knob affects performance, as the higher-fidelity prototype performed 0.6s slower than the low-fidelity prototype.

References

1. ASUS. 2017. Zenfone 2 Laser. https://www.asus.com/Phone/ZenFone-2-Laser-ZE500KL/. (2017). Accessed: 11-01-2018
2. Joanna Bergstrom-Lehtovirta and Antti Oulasvirta. 2014. Modeling the functional area of the thumb on mobile touchscreen surfaces. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '14). ACM, New York, NY, USA, 1991-2000.
3. Roald A. Bjørklund. 1991. Reaction time and movement time measured in a key-press and a key-release condition. Perceptual and Motor Skills 72, 2 (1991), 663--673. PMID: 1852576
4. Youli Chang, Sehi L'Yi, Kyle Koh, and Jinwook Seo. 2015. Understanding Users' Touch Behavior on Large Mobile Touch-Screens and Assisted Targeting by Tilting Gesture. In Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems (CHI '15). ACM, New York, NY, USA, 1499-1508.
5. Olivier Chapuis and Pierre Dragicevic. 2011. Effects of motor scale, visual scale, and quantization on small target acquisition difficulty. ACM Trans. Comput.-Hum. Interact. 18, 3, Article 13 (August 2011), 32 pages.
6. Andy Cockburn, Carl Gutwin, Joey Scarr, and Sylvain Malacria. 2014. Supporting Novice to Expert Transitions in User Interfaces. ACM Comput. Surv. 47, 2, Article 31 (November 2014), 36 pages.
7. Céline Coutrix and Cédric Masclet. 2015. Shape-Change for Zoomable TUIs: Opportunities and Limits of a Resizable Slider. In Human Computer Interaction - INTERACT 2015. Lecture Notes in Computer Science, Vol. 9296. Springer International Publishing, 349--366.
8. Rachel Eardley, Steve Gill, Anne Roudaut, Stephen Thompson, and Joanna Hare. 2016. Investigating how the hand interacts with different mobile phones. In Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services Adjunct (MobileHCI '16). ACM, New York, NY, USA, 698-705.
9. Feetech. 2017. Micro 360 Degrees Continuous Rotation Servo http://www.feetechrc.com/product/analog-servo/micro-1-3kg-cm-360-degree-continuous-rotation-servo-fs90r/. (2017). Accessed: 11-01-2018
10. Hiroyuki Hakoda, Yoshitomo Fukatsu, Buntarou Shizuki, and Jiro Tanaka. 2015. Back-of-Device Interaction based on the Range of Motion of the Index Finger. In Proceedings of the Annual Meeting of the Australian Special Interest Group for Computer Human Interaction (OzCHI '15), Bernd Ploderer, Marcus Carter, Martin Gibbs, Wally Smith, and Frank Vetere (Eds.). ACM, New York, NY, USA, 202-206.
11. Fabian Hemmert, Gesche Joost, André Knörig, and Reto Wettach. 2008. Dynamic knobs: shape change as a means of interaction on a mobile phone. In CHI '08 Extended Abstracts on Human Factors in Computing Systems (CHI EA '08). ACM, New York, NY, USA, 2309-2314.
12. Steven Hoober. 2011. How Do Users Really Hold Mobile Devices? http://www.uxmatters.com/mt/archives/2013/02/how-do-users-really-hold-mobile-devices.php. (2011). Accessed: 11-01-2018
13. Yvonne Jansen, Pierre Dragicevic, and Jean-Daniel Fekete. 2012. Tangible remote controllers for wall-size displays. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '12). ACM, New York, NY, USA, 2865-2874.
14. Amy K. Karlson and Benjamin B. Bederson. 2007. ThumbSpace: generalized one-handed input for touchscreen-based mobile devices. In Proceedings of the 11th IFIP TC 13 international conference on Human-computer interaction (INTERACT'07), Cécilia Baranauskas, Philippe Palanque, Julio Abascal, and Simone Diniz Junqueira Barbosa (Eds.). Springer-Verlag, Berlin, Heidelberg, 324-338
15. Amy K. Karlson, Benjamin B. Bederson, and Jose L. Contreras-Vidal. 2008. Understanding One-Handed Use of Mobile Devices. In Handbook of Research on User Interface Design and Evaluation for Mobile Technology. IGI Global, Hershey, PA, USA, Chapter 6, 86--101.
16. Hyunyoung Kim, Céline Coutrix and Anne Roudaut. 2018. KnobSlider: Design of a Shape-Changing UI for Parameter Control. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI'18), April 21-26, Montréal, Canada, ACM. 10+3 pages.
17. Lars Lischke, Paweł W. Woźniak, Sven Mayer, Andreas Preikschat, and Morten Fjeld. 2017. Using Variable Movement Resistance Sliders for Remote Discrete Input. In Proceedings of the 2017 ACM International Conference on Interactive Surfaces and Spaces (ISS '17). ACM, New York, NY, USA, 116-125.
18. Markus Löchtefeld, Christoph Hirtz, and Sven Gehring. 2013. Evaluation of Hybrid Front- and Back-of-device Interaction on Mobile Devices. In Proceedings of the 12th International Conference on Mobile and Ubiquitous Multimedia (MUM '13). ACM, New York, NY, USA, Article 17, 4 pages.
19. Mathieu Nancel, Daniel Vogel, and Edward Lank. 2015. Clutching Is Not (Necessarily) the Enemy. In Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems (CHI '15). ACM, New York, NY, USA, 4199--4202.
20. Simon Robinson, Céline Coutrix, Jennifer Pearson, Juan Rosso, Matheus Fernandes Torquato, Laurence Nigay, and Matt Jones. 2016. Emergeables: Deformable Displays for Continuous Eyes-Free Mobile Interaction. In Proceedings of the 2016 CHI Conference on Human Factors in Computing Systems (CHI '16). ACM, New York, NY, USA, 3793-3805.
21. Juan Rosso, Céline Coutrix, Matt Jones, and Laurence Nigay. 2016. Impact of mobile tangible slider design and its reachability on pointing performance. In Actes de la 28ième conférence francophone sur l'Interaction Homme-Machine (IHM '16). ACM, New York, NY, USA, 70-78.
22. Juan Rosso, Céline Coutrix, Matt Jones, and Laurence Nigay. 2017. Deformable Tangible Slider for Eyes-Free One-Handed Thumb Interaction on Mobile Devices. In Actes de la 29ième conférence francophone sur l'Interaction Homme-Machine (IHM '17). AFIHM, Ed., AFIHM, ACM (Poitiers, France, Aug. 2017), 11 p.
23. Anne Roudaut, Stéphane Huot, and Eric Lecolinet. 2008. TapTap and MagStick: improving one-handed target acquisition on small touch-screens. In Proceedings of the working conference on Advanced visual interfaces (AVI '08). ACM, New York, NY, USA, 146--153.
24. Jeff Sauro and James R. Lewis. 2010. Average Task Times in Usability Tests: What to Report?. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '10). ACM, New York, NY, USA, 2347--2350.
25. Samuel Shaki, Martin Fischer and William Petrusic. 2009. Reading habits for both words and numbers contribute to the snarc effect. Psychonomic Bulletin & Review 16, 2 (Apr 2009), 328--331
26. R. William Soukoreff and I. Scott MacKenzie. 2004. Towards a Standard for Pointing Device Evaluation, Perspectives on 27 Years of Fitts' Law Research in HCI. Int. J. Hum.-Comput. Stud. 61, 6 (Dec. 2004), 751--789.
27. Sparkfun. 2107. SoftPot Membrane Potentiometer 200mm. https://www.sparkfun.com/products/8679. (2017). Accessed: 11-01-2018
28. Melanie Tory and Robert Kincaid. 2013. Comparing physical, overlay, and touch screen parameter controls. In Proceedings of the 2013 ACM international conference on Interactive tabletops and surfaces (ITS '13). ACM, New York, NY, USA, 91-100.
29. Giovanni Maria Troiano, Esben Warming Pedersen, and Kasper Hornbæk. 2014. User-defined gestures for elastic, deformable displays. In Proceedings of the 2014 International Working Conference on Advanced Visual Interfaces (AVI '14). ACM, New York, NY, USA, 1-8.
30. UK National Health System. Repetitive Strain Injury (RSI). https://www.nhs.uk/conditions/repetitive-strain-injury-rsi/. (2011). Accessed: 11-01-2018
31. USA Department of Health & Human Services. System Usability Scale (SUS). https://www.usability.gov/how-to-and-tools/methods/system-usability-scale.html. (2011). Accessed: 11-01-2018
32. Jacob O. Wobbrock, Leah Findlater, Darren Gergle, and James J. Higgins. 2011. The Aligned Rank Transform for Nonparametric Factorial Analyses Using Only Anova Procedures. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '11). ACM, New York, NY, USA, 143--146.
33. Pawel Woźniak, Morten Fjeld, and Shengdong Zhao. 2014. Limiting trial and error: introducing a systematic approach to designing clutching. In Proceedings of the Second International Symposium of Chinese CHI (Chinese CHI '14). ACM, New York, NY, USA, 35-39.
34. Bo Yi, Xiang Cao, Morten Fjeld, and Shengdong Zhao. 2012. Exploring user motivations for eyes-free interaction on mobile devices. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '12). ACM, New York, NY, USA, 2789-2792.
35. Neng-Hao Yu, Da-Yuan Huang, Jia-Jyun Hsu, and Yi-Ping Hung. 2013. Rapid selection of hard-to-access targets by thumb on mobile touch-screens. In Proceedings of the 15th international conference on Human-computer interaction with mobile devices and services (MobileHCI '13). ACM, New York, NY, USA, 400-403.

Index Terms

• Human-centered computing

  • Human computer interaction (HCI)

    • Interaction techniques

  • Ubiquitous and mobile computing

    • Ubiquitous and mobile devices

      • Mobile devices