HCIL-89-18

Plaisant, C., Shneiderman, B.
revised Feb. 1991
International Journal of Man-Machine Studies (1992) 36, 375-393.
HCIL-89-18, CS-TR-2352, CAR-TR-472
This article describes four different user interfaces supporting scheduling two-state (ON/OFF) devices over time periods ranging from minutes to days. The touchscreen-based user interfaces including a digital, 12-h clock, 24-h linear and 24-h dial proto types are described and compared on a feature by feature basis. A formative usability test with 14 subjects, feedback from more than 30 reviewers, and the flexibility to add functions favour the 24-h linear version.
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