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ReferencesNavigation arrowAuthorsNavigation arrowWilliam P. Marshak
May 23

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William P. Marshak

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Publications by William P. Marshak (bibliography)

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1987
 
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Marshak, William P., Kuperman, Gilbert, Ramsey, Eric G. and Wilson, Denise (1987): Situational Awareness in Map Displays. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 533-535.

“The effectiveness of ego-centered (moving-map) and earth-centered (moving plane) displays was studied with subjects monitoring an animated aircraft situational awareness display. Other independent variables were subject experience (aircrew vs non-aircrew) and path complexity (straight vs turning). Periodically, the display blanked and probe questions were asked concerning the relationship of the aircraft to the simulated world. Questions included judgements about angles, distances, time and terrain. Simple paths elicited a 28 percent lower error rate than did complex paths. Moving map displays had a 32 lower error rate than moving plane displays. No other significant effects were observed. Subjective ratings by subjects after the experiment revealed unanimous preference for the moving plane display and that the moving plane condition was believed to be easier! This contradiction indicates subjective data is limited in determining display effectiveness.”

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

 
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Marshak, William P. and Osarczuk, John C. (1987): Signal Detection Performance as a Function of Fourier Description of Symbols. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 1198-1201.

“Performance on a signal detection task was explainable by differences between the two dimensional Fourier transforms of the background and target stimuli. A signal detection experiment by Marshak and Osarczuk (1984) used target and background stimuli designed to systematically differ in spatial frequency and orientation. They found that the hypothesized Fourier differences increased sensitively and decreased decision time. The present paper reports the Fourier analysis of those stimuli which verify and quantify the stimulus manipulation. Multiple regressions were computed using differences in frequency and orientation to explain performance. The results were that 83 percent of d-prime and 74 percent of the decision time variance could be explained by the Fourier differences. These findings indicate that fourier descriptions of symbols may be used to predict their effectiveness in work station environments.”

© All rights reserved Marshak and Osarczuk and/or Human Factors Society

 
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25 Jun 2007: Added

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URL: http://www.interaction-design.org/references/authors/william_p__marshak.html
May 23

“ Knowledge is commonly socially constructed, through collaborative efforts towards shared objectives or by dialogues and challenges brought about by different persons' perspectives. ”

-- G. Salomon (in "Distributed Cognitions: Psychological and Educational Considerations")

 
 

Featured chapter

Read the fascinating history of Wearable Computing, told by its father, Steve Mann

Read Steve's chapter !

 
 

Help us help you!

 
 
 
 
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