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Separating A and W effects: Pointing to targets on computer displays
Published online by Cambridge University Press: 30 August 2019
Abstract
We address two main issues: the distinction between time-constrained and spatially constrained tasks, and the separable A and W effects on movement time (MT) in spatially- constrained tasks. We consider MT and 3-D kinematic data from human adults pointing to targets in human-computer interaction. These are better fit by Welford's (1968) two- part model, than Fitts' (1954; Fitts & Peterson 1964) ID model. We identify theoretical and practical implications.
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- 1997 Cambridge University Press
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