Effects of grip span in one-handed thumb interaction with a smartphone: Beyond the thumb's length limitation

Kiseok Sung, Jay Cho, Andris Freivalds

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

The purpose of this study was to investigate whether different grip spans affected the touch performance of one-handed thumb interaction with a smartphone. Tapping time, hit count, and thumb-tip displacement were measured while using three mock-ups of an iPhone 5S, 6, and 6 Plus, respectively. In the tapping task, four positions were tested: top-left, top-right, bottom-left, and bottom-right. The results showed that the hit count (F2,14=8.596, p=.004) and thumb-tip displacement (F2,14=11.348, p=.001) significantly decreased as the grip span increased. Thus, we concluded that there existed another problem beyond the limit of thumb length that caused a reachability issue when using a large smartphone. Thus, this should be considered in the user interface design of a large smartphone.

Original languageEnglish (US)
Pages (from-to)1047-1051
Number of pages5
JournalProceedings of the Human Factors and Ergonomics Society
DOIs
StatePublished - Jan 1 2016
EventHuman Factors and Ergonomics Society 2016 International Annual Meeting, HFES 2016 - Washington, United States
Duration: Sep 19 2016Sep 23 2016

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Smartphones
interaction
user interface
Mockups
User interfaces
performance
time

All Science Journal Classification (ASJC) codes

  • Human Factors and Ergonomics

Cite this

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abstract = "The purpose of this study was to investigate whether different grip spans affected the touch performance of one-handed thumb interaction with a smartphone. Tapping time, hit count, and thumb-tip displacement were measured while using three mock-ups of an iPhone 5S, 6, and 6 Plus, respectively. In the tapping task, four positions were tested: top-left, top-right, bottom-left, and bottom-right. The results showed that the hit count (F2,14=8.596, p=.004) and thumb-tip displacement (F2,14=11.348, p=.001) significantly decreased as the grip span increased. Thus, we concluded that there existed another problem beyond the limit of thumb length that caused a reachability issue when using a large smartphone. Thus, this should be considered in the user interface design of a large smartphone.",
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AB - The purpose of this study was to investigate whether different grip spans affected the touch performance of one-handed thumb interaction with a smartphone. Tapping time, hit count, and thumb-tip displacement were measured while using three mock-ups of an iPhone 5S, 6, and 6 Plus, respectively. In the tapping task, four positions were tested: top-left, top-right, bottom-left, and bottom-right. The results showed that the hit count (F2,14=8.596, p=.004) and thumb-tip displacement (F2,14=11.348, p=.001) significantly decreased as the grip span increased. Thus, we concluded that there existed another problem beyond the limit of thumb length that caused a reachability issue when using a large smartphone. Thus, this should be considered in the user interface design of a large smartphone.

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