Different Strokes for Different Folks? Revealing the Physical Characteristics of Smartphone Users from their Swipe Gestures

Anthropometrics show that the lengths of many human body segments follow a common proportional relationship. To know the length of one body segment – such as a thumb – potentially provides a predictive route to other physical characteristics, such as overall standing height. In this study, we examined whether it is feasible that the length of a person׳s thumb could be revealed from the way in which they complete swipe gestures on a touchscreen-based smartphone.