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Fingers' Range and Comfortable Area for One-Handed Smartphone Interaction Beyond the Touchscreen

Published: 19 April 2018 Publication History

Abstract

Previous research and recent smartphone development presented a wide range of input controls beyond the touchscreen. Fingerprint scanners, silent switches, and Back-of-Device (BoD) touch panels offer additional ways to perform input. However, with the increasing amount of input controls on the device, unintentional input or limited reachability can hinder interaction. In a one-handed scenario, we conducted a study to investigate the areas that can be reached without losing grip stability (comfortable area), and with stretched fingers (maximum range) using four different phone sizes. We describe the characteristics of the comfortable area and maximum range for different phone sizes and derive four design implications for the placement of input controls to support one-handed BoD and edge interaction. Amongst others, we show that the index and middle finger are the most suited fingers for BoD interaction and that the grip shifts towards the top edge with increasing phone sizes.

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References

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  1. Fingers' Range and Comfortable Area for One-Handed Smartphone Interaction Beyond the Touchscreen

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    cover image ACM Conferences
    CHI '18: Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems
    April 2018
    8489 pages
    ISBN:9781450356206
    DOI:10.1145/3173574
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    Published: 19 April 2018

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    Author Tags

    1. comfortable area
    2. finger range
    3. one-handed
    4. smartphone

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