Balerna, Myriam
Ghosh, Arko
Article History
Received: 21 June 2017
Revised: 31 August 2017
Accepted: 5 September 2017
First Online: 7 March 2018
Competing interests
: Author A.G. is an inventor of a patent-pending technology used in this manuscript and co-founder of QuantActions GmbH, a for-profit company focused on smartphone touchscreen behavior. All other authors declare no competing financial interests.