Christian Corsten, Simon Voelker, Jan Borchers
In Proceedings of ISS '17, ACM, 246 - 251
Publication year: 2017



Modern smartphones, like iPhone 7, feature touchscreens with co-located force sensing. This makes touch input more expressive, e.g., by enabling single-finger continuous zooming when coupling zoom levels to force intensity. Often, however, the user wants to select and confirm a particular force value, say, to lock a certain zoom level. The most common confirmation techniques are Dwell Time (DT) and Quick Release (QR). While DT has shown to be reliable, it slows the interaction, as the user must typically wait for 1s before her selection is confirmed. Conversely, QR is fast but reported to be less reliable, although no reference reports how to actually detect and implement it. In this paper, we set out to challenge the low reliability of QR: We collected user data to (1) report how it can be implemented and (2) show that it is as reliable as DT (97.6% vs. 97.2% success). Since QR was also the faster technique and more preferred by users, we recommend it over DT for force confirmation on modern smartphones.

The Talk

The Team

This a research project by Christian CorstenSimon Voelker, and Jan Borchers from the Media Computing Group. It is funded in part through the German B-IT Foundation.


 author = {Corsten, Christian and Voelker, Simon and Borchers, Jan},
 title = {Release, Don'T Wait!: Reliable Force Input Confirmation with Quick Release},
 booktitle = {Proceedings of the 2017 ACM International Conference on Interactive Surfaces and Spaces},
 series = {ISS '17},
 year = {2017},
 isbn = {978-1-4503-4691-7},
 location = {Brighton, United Kingdom},
 pages = {246--251},
 numpages = {6},
 url = {},
 doi = {10.1145/3132272.3134116},
 acmid = {3134116},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {Force, pressure, quick release, smartphone, touchscreen},