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Richard J. Jagacinski

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Publications by Richard J. Jagacinski (bibliography)

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1995
 
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Liao, Min-Ju, Jagacinski, Richard J. and Greenberg, Neil (1995): Quantifying the Performance Limitations of Older Adults in a Target Acquisition Task. In: Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting 1995. p. 961.

The acquisition times of older adults in a target acquisition task were a strong linear function of the acquisition times of younger adults, which was regarded as evidence of generalized slowing in aging. Older adults were found to have greater spatial variability of submovement endpoints for higher submovement velocities. This elevated motor noise is considered to be a primary cause of their slower performance. Supplementary auditory displays of the subjects' own position or velocity did not improve performance, which suggests that perceptual noise in this task is not a primary limiting factor. Older adults exhibited a repetition effect while younger adults exhibited a contrast effect when performing sequences of varied movements. This difference suggests that older adults may plan their movements individually, while younger adults plan a sequence of movements.

© All rights reserved Liao et al. and/or Human Factors Society

1985
 
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Jagacinski, Richard J. and Monk, Donald L. (1985): Fitts' Law in Two Dimensions with Hand and Head Movements. In Journal of Motor Behavior, 17 pp. 77-95.

 Cited in the following chapter:

Fitts's Law: [/encyclopedia/fitts_law.html]


 
1980
 
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Jagacinski, Richard J., Repperger, Daniel W., Moran, Martin S., Ward, Sharon L. and Glass, Betty (1980): Fitts' Law and the Microstructure of Rapid Discrete Movements. In Journal of Experimental Psychology: Human Perception and Performance, 6 pp. 309-320.

 Cited in the following chapter:

Fitts's Law: [/encyclopedia/fitts_law.html]


 
 
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Changes to this page (author)

11 Feb 2008: Added
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URL: http://www.interaction-design.org/references/authors/richard_j__jagacinski.html
Jul 12

To design an easy-to-use interface, pay attention to what users do, not what they say. Self-reported claims are unreliable, as are user speculations about future behavior.

-- Jakob Nielsen

 
 

Featured chapter

Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess

User Experience and Experience Design !

 
 

Our Latest Books

Kumar and Herger 2013: Gamification at Work: Designing Engaging Business Software...
by Janaki Mythily Kumar and Mario Herger

 
Start reading

Whitworth and Ahmad 2013: The Social Design of Technical Systems: Building technologies for communities...
by Brian Whitworth and Adnan Ahmad

 
Start reading

Soegaard and Dam 2013: The Encyclopedia of Human-Computer Interaction, 2nd Ed....
by Mads Soegaard and Rikke Friis Dam

 
Start reading
 
 

Help us help you!