Influence of age and interaction complexity on touch screen

This study investigated the optimal numbers of blocks and tactile targets for touch screen user interfaces intended for use by all (reference and older population). Three independent variables (number of targets, number of interaction blocks on the touch screen and number of hands used) were studied in an experiment. Huge amount of data were stored. In this paper, we will only report statistical analyses on three variables: number of clicks on wrong target, number of missed clicks on right target and the target acquisition time according to its color and its position. Each variable will be analyzed to demonstrate the age impact between the two populations and an analysis on slice of age intra older population.