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Investigating Screen Reachability on an Articulated Dual-Display Smartphone

Large displays on smartphones accommodate tasks needing more screen real-estate, but at the expense of limiting the use of one-handed operations. In this paper we explore thumb reachability on an articulated dual-display smartphone. While mobile devices are featuring dual screens, no previous work has explored how each physical display’s positions impact one-handed reach and interaction. We explore 32 inter-display configurations resulting from the combination of orientations of the two displays along two axes. In a preliminary study we explore how users grasp such dual-display configurations. We then conduct a study to investigate the effects of the relative position of two displays on thumb reachability. Results provide a range of dual-display configurations that are ideal for one-handed use, enabling knowledge on how apps for such emerging devices can be optimized for thumb input.


Pecchioli M., Dubois E., Irani P., Serrano M. (2019) Investigating Screen Reachability on an Articulated Dual-Display Smartphone. In: Lamas D., Loizides F., Nacke L., Petrie H., Winckler M., Zaphiris P. (eds) Human-Computer Interaction – INTERACT 2019. INTERACT 2019. Lecture Notes in Computer Science, vol 11748. Springer, Cham

Bibtext Entry

author = "Pecchioli, M. and Dubois, E. and Irani, P. and Serrano, M.",
copyright = "Copyright 2019 Elsevier B.V., All rights reserved.",
isbn = "9783030293864",
issn = "03029743",
journal = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
keywords = "Dual-Display ; One-Handed Input ; Tactile Reachability ; Thumb Input",
pages = "476,485",
publisher = "Springer Verlag",
title = "Investigating Screen Reachability on an Articulated Dual-Display Smartphone",
volume = "11748",
year = "2019",


Pourang Irani

Pourang Irani

Canada Research Chair
at University of British Columbia Okanagan Campus

As well as: Emmanuel Dubois