Potter, R., Berman, M., Shneiderman, B. (Nov. 1988)
High resolution touch screens and novel usage strategies have overcome earlier problems with parallax and inaccurate pointing. A study testing the utility of three touch screen strategies within the Hyperties hypertext environment was performed. This provided a replication and extension of an earlier touch screen strategy comparison that focused on small closely-spaced targets. The experiment compared three touch screen strategies in three experimental tasks that reflect hypertext usage. The results showed that a strategy that only uses the initial impact with the touch screen causes the use to miss the target more than other touch strategies. A statisticallyx significant difference in errors was found. Our results should encourage system implementers and touch screen hardware desiners to support "touch mouse" strategies that enable coursor dragging on the touch screen surface.