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ReferencesNavigation arrowAuthorsNavigation arrowRobert Yearout
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

 
 

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Robert Yearout

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Publications by Robert Yearout (bibliography)

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1992
 
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Yearout, Robert, Hewitt, Darlene, Lisnerski, Donald and Sprague, Kelli (1992): Managerial Implications of Extended Breaks on Predicting Performance Times for Industrial Tasks. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. pp. 825-828.

“Production Managers and Industrial Engineers have relied upon learning (progress) curves for over fifty years. However, until recently only the impacts of extended breaks on performance time predictions were considered. This study examined the effect of breaks on two typical simulated industrial tasks. Fifty-eight subjects performed either the traditional peg-board, a low cognitive task, or a spreadsheet graphic, a moderately-high cognitive task, for 28 iterations. Upon completion of the assigned task, a break period that ranged from 2 to 83 days was randomly assigned to each subject. After the break, subjects replicated their assigned task. Regression analysis was used to select the best model to predict the performance time for the first iteration after a break. An exponential model was selected for the low cognitive task and a multiple linear model for the moderately-high cognitive task. Both models selected were no-intercept models and had multiple correlation coefficients of 0.729 and 0.897 respectively. The ability to accurately predict the first iteration time after a break is a key element in calculating time lost to forgetting and determining the forgetting function. These models may be useful in assisting production managers and industrial engineers in establishing more realistic progress curves and accurate standard times, thus reducing excessive idle time.”

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

1987
 
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Yearout, Robert and Konz, Stephan (1987): Illumination Levels in Offices with Visual Display Units. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 1113-1115.

“This paper investigatest the optimal illumination levels for offices equipped with visual display units (VDUs). Twenty-four paid subjects keyed in typical word processing data for 6 min per condition. General illumination was provided by a mixture of indirect and direct lighting sources. This illumination was held at 350 lux at the workstation. The experimental variables for the 6 conditions were: (1) two illuminations of the room wall and (2) three illumination levels in the area directly ahead of the operator. When VDU workstations are illuminated at 350 lux to eliminate glare, operators prefer an intermediate illumination level (800 lux) in the office space to their front over 415 lux or 1170 lux. Operators also preferred increased brightness contrast on the wall. Design should consider not only the workstation itself but also the surrounding.”

© All rights reserved Yearout and Konz and/or Human Factors Society

 
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26 Jun 2007: Modified
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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
 
 

Help us help you!

 
 
 
 
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