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PVT-touch: Adapting a reaction time test for touchscreen devices
Conference proceeding   Open access

PVT-touch: Adapting a reaction time test for touchscreen devices

Matthew Kay, Kyle Rector, Sunny Consolvo, Ben Greenstein, Jacob O Wobbrock, Nathaniel F Watson and Julie A Kientz
2013 7th International Conference on Pervasive Computing Technologies for Healthcare and Workshops, pp.248-251
05/2013
DOI: 10.4108/icst.pervasivehealth.2013.252078
url
https://doi.org/10.4108/icst.pervasivehealth.2013.252078View
Published (Version of record) Open Access

Abstract

The Psychomotor Vigilance Task (PVT) is a validated reaction time (RT) test used to assess aspects of sleep loss including alertness and sleepiness. PVT typically requires a physical button to assess RT, which minimizes the effect of execution time (the time taken to perform a gesture) on RT. When translating this application to mobile devices, a touchscreen version is useful for widespread in situ sleepiness assessments to produce more ecologically valid data. We describe the Android-based implementation of a touchscreen version of PVT, called PVTTouch. In an evaluation (N=20), we compared four different touchscreen input techniques to a physical button: touch down, finger lift,finger tilt, and goal crossing. We found that touch down was comparable to the physical button approach used in traditional PVT in execution time and in several measures associated with sleepiness, and was preferred by most participants. We also found that finger lift may be a more precise but less intuitive measure, which may warrant further study.
 health health assessment personal informatics psychomotor vigilance task PVT reaction time sleep touchscreen

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