Robert Pastel
ABSTRACT
The steering law is intended to predict the performance of cursor manipulations in user interfaces, but the law has been verified for only a few path shapes and should be verified for more if it is to be generalized. This study extends the steering law to paths with corners. Two experiments compare the movement times of negotiating paths with corners to straight paths with the same width and movement amplitude. The experimental results show a significant effect on the movement times due to the corners, extending far into the legs of the path's corner. Modeling the results using resource theory, a cognitive theory for divided attention, suggests that steering through corners is two simultaneous tasks: steering along the legs of the corner and aiming at the corner.
- Accot, J., and Zhai, S., Refining Law Models for Bivariate Pointing, In Proc.CHI2003 ACM Press (2003), 193--200. Google Scholar
Digital Library
- Accot, J., and Zhai, S., Scale Effects in Steering Law Tasks, In Proc. CHI2001, ACM Press (2001), 1--8. Google ScholarDigital Library
- Accot, J. and Zhai, S., Performance Evaluations of Input Devices in Trajectory-based Tasks: An application of the Steering Law, In Proc. CHI99, ACM Press (1999), 466--472. Google ScholarDigital Library
- Accot, J., and Zhai, S., Beyond Fitts' Law: Models for Trajectory-Based HCI Tasks, In Proc. CHI97, ACM Press (1997), 295--302. Google ScholarDigital Library
- Ahlström, D., Modeling and Improving Selection in Cascading Pull-down Menus Using Fitts' Law, the Steering Law and Force Fields, In Proc. CHI2005, ACM Press (2005), 61--70. Google ScholarDigital Library
- Dennerlein, J.T., Martin, D.B. and Hasser, C., Force-Feedback Improves Performance for Steering and Combined Steering-Targeting Tasks, In Proc. CHI2000, ACM Press (2000), 423--429. Google ScholarDigital Library
- Fitts, P.M., The Information Capacity of the Human Motor System in Controlling the Amplitude of Movement, Quarterly Journal of Psychology, (1954) 47, 381--391.Google Scholar
- Gopher, D., and Navon, D., How is Performance Limited: Testing the Notion of Central Capacity, Acta Psychologica (1980) 46, 161--180.Google Scholar
- Hoffmann, E.R. and Lim, J.T.A., Concurrent Manual-decision Tasks, Ergonomics, (1997) 40:3, 293--318.Google Scholar
- Langolf, G.D., Chafflin, D.B., and Foulke, J.A., An Investigation of Law Using a Wide Range of Movement Amplitude, J. Motor Behav.,(1976) 8:2,113--128.Google Scholar
- MacKenzie, S. and Buxton, W., Extending Fitts' Law to Two-dimensional Tasks, In Proc. CHI92, (1992), 219--223. Google ScholarDigital Library
- MacKenzie, S., Sellen, A. and Buxton, W., A Comparison of Input Devices in Elemental Pointing and Dragging Tasks, In Proc. CHI91, ACM Press (1991), 161--166. Google ScholarDigital Library
- Navon, D., and Gopher, D., Task Difficulty, Resources, and Dual-task Performance, in Attention and Performance, edited by Nickersor, R.S., Erlbaum, NJ, 1980, 297--315.Google Scholar
- Norman, D.A.and Bobrow, D.G., On Data-limited and Resource-limited Processes, Cognit. Psych., 7, 44--64, 1975.Google ScholarCross Ref
- Pinheiro, J.C. and Bates, D.M., Mixed-Effects Models in S and S-PLUS, Springer, New York, NY, 2000.Google ScholarCross Ref
- Venables, W.N. and Ripley, B.D., Modern Applied Statistics with S, Springer, New, NY, 2002.Google ScholarDigital Library
- Wickens, C.D. and Hollands, J.G., Engineering Psychology and Human Performance, third edition Prentice Hall, Upper Saddle River, New Jersey, 2000.Google Scholar
- Wickens, C.D., and Lilu, Y., Codes and Modalities en Multiple Resources: A Success and A Qualification, Human Factors, 1988, 30, 5, 599--616. Google ScholarDigital Library
Index Terms
- Measuring the difficulty of steering through corners
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