High precision touchscreens: design strategies and comparisons with a mouse

Andrew Sears, Ben Shneiderman

Research output: Contribution to journalArticle

205 Scopus citations

Abstract

Three studies were conducted comparing speed of performance, error rates and user preference ratings for three selection devices. The devices tested were a touchscreen, a touchscreen with stabilization (stabilization software filters and smooths raw data from hardware), and a mouse. The task was the selection of rectangular targets 1, 4, 16 and 32 pixels per side (0·4 × 0·6, 1·7 × 2·2, 6·9 × 9·0, 13·8 × 17·9 mm respectively). Touchscreen users were able to point at single pixel targets, thereby countering widespread expectations of poor touchscreen resolution. The results show no difference in performance between the mouse and touchscreen for targets ranging from 32 to 4 pixels per side. In addition, stabilization significantly reduced the error rates for the touchscreen when selecting small targets. These results imply that touchscreens, when properly used, have attractive advantages in selecting targets as small as 4 pixels per size (approximately one-quarter of the size of a single character). A variant of Fitts' Law is proposed to predict touchscreen pointing times. Ideas for future research are also presented.

Original languageEnglish (US)
Pages (from-to)593-613
Number of pages21
JournalInternational Journal of Man-Machine Studies
Volume34
Issue number4
DOIs
StatePublished - Apr 1991

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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