Usability Questionnaire Results - Institute of Aviation - University of ...

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evealed a significant main effect for display condition (F (2,25) =297.0, p
Median # of Capacitor Closures per TrialMedian # of Closures1.51.41.31.21.110.9Tabular One-Line ContourSingle Violation TrialsMultiple Violation TrialsFigure 4-3. Median Number of Capacitor Closures per Trial4.5 Task-Order ErrorsTask-order errors occurred when participants attempted to solve the voltage violationsbefore acknowledging all of the violations. A task-order error could occur only once per trial, ifone occurred at all. The occurrence of a task-order error was rare, and the mean number ofoccurrences per subject and the variability was generally very small across all groups (see Figure4-4). Therefore, a non-parametric median test was used again in lieu of an ANOVA to examinethe number of task-order errors across display groups. The results of this analysis revealed thatthe number of task-order errors that occurred total in a condition differed between displayconditions, χ 2 (2) = 6.6, p=.037. More task-order errors generally occurred in the contour group(Md= 1, SD=.83) than in either the tabular group (Md=0 , SD=.33) or the one-line group (Md= 0,SD=.32).Order Violations Across GroupsMean # of Trials with OrderViolations10.80.60.40.20Tabular One-Line ContourFigure 4-4. Order Violations Across Groups28
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Page 9 and 10: Third, false alarms are much more c
Page 11 and 12: 2.2.2.1 Close Spatial Proximity Dis
Page 13 and 14: Furthermore, configural displays ne
Page 15 and 16: calling for precise judgment of one
Page 17 and 18: found that subjects performing a vi
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Page 21 and 22: organized as well perceptually, and
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Page 33: effect on the bus voltages that was
Page 36 and 37: Carswell, C. M. & Wickens, C. D. (1
Page 38 and 39: Pomerantz, J. R. (1981). Perceptual

Usability Questionnaire Results - Institute of Aviation - University of ...

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