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Philip J. Masline

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Publications by Philip J. Masline (bibliography)

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1987
 
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Biers, David W. and Masline, Philip J. (1987): Alternative Approaches to Analyzing SWAT Data. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 63-66.

The present study sought to determine the sensitivity of three alternative approaches to deriving a workload composite measure based upon data gathered using the Subjective Workload Assessment Technique (SWAT) and to determine through the use of multivariate statistical procedures (MANOVA) if anything is to be gained by retaining the individual scale information of SWAT. The three rating scale dimensions of SWAT (time load, mental effort load, psychological stress load) were combined into a single workload composite using three techniques: conjoint measurement; a simple sum of the three scales weighted equally; an empirically determined weighted-linear combination of the three scales (from MANOVA). Using data gathered by having subjects perform a continuous memory task under twelve levels of task difficulty, it was found that the three composite measures were equally sensitive and highly correlated (the minimum correlation among the three composites being 0.9913). The results of the MANOVA performed on the same data indicated that the individual scales of SWAT were differentially sensitive to different task demands and that individual scale information should be retained rather than rely on a simple composite.

© All rights reserved Biers and Masline and/or Human Factors Society

 
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Masline, Philip J. and Biers, David W. (1987): An Examination of Projective versus Post-Task Subjective Workload Ratings for Three Psychometric Scaling Techniques. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 77-80.

The validity of three projective workload techniques -- magnitude estimation, equal appearing intervals, and the subjective workload assessment technique (SWAT) -- was examined using a simple laboratory task. Ratings of workload by subjects who received only written and verbal descriptions of the task (projective group) were compared to ratings from subjects who performed the task (experimental group). Results indicated that, for all rating scale techniques, subjects were able to validly project ratings of workload. Magnitude estimation possessed a higher degree of correspondence between both groups than the other two scales. This finding offers workload researchers involved with system predesign considerations more options in the choice of an appropriate projective workload metric.

© All rights reserved Masline and Biers and/or Human Factors Society

 
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Polzella, Donald J., Masline, Philip J., Amell, John R., Perez, William A. and Ramsey, Eric G. (1987): The Development of a Spatial Orientation Task for Inclusion in the Criterion Task Set (CTS). In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 394-397.

Twelve subjects performed the airplane task, a test of spatial ability, in order to determine whether or not the task is suitable for inclusion in the CTS battery. Subjects performed 12 trials of the task on four consecutive days. Both performance and subjective measures were recorded. Three significantly different loading levels were obtained using the rear, front, and bottom views of the plane. It was concluded that the airplane task appears to be suitable for inclusion in the CTS.

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

 
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Changes to this page (author)

25 Jun 2007: Modified
25 Jun 2007: Modified
25 Jun 2007: Added

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URL: http://www.interaction-design.org/references/authors/philip_j__masline.html
Jun 19

... there are no simple 'right' answers for most web design questions (at least not for the important ones). What works is good, integrated design that fills a need--carefully thought out, well executed, and tested.

-- Steve Krug, Don't Make Me Think, p. 136

 
 

Featured chapter

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

Read Steve's chapter !

 
 

Latest books

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

 
Start reading

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

 
Start reading
 
 

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