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ReferencesNavigation arrowAuthorsNavigation arrowRobert J. Marley

Publication statistics

Pub. period:1987-1994
Pub. count:6
Number of co-authors:11



Co-authors

Number of publications with 3 favourite co-authors:

Jeffrey E. Fernandez:4
Nancy B. Stubbs:2
Rob R. Wehrman:1

 

 

Productive colleagues

Robert J. Marley's 3 most productive colleagues in number of publications:

Jeffrey E. Fernand..:8
Nancy B. Stubbs:2
Rob R. Wehrman:1
 
 
 
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 J. Marley

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Publications by Robert J. Marley (bibliography)

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1994
 
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Angel, Sue Mason, Marley, Robert J. and Stadtlander, Leann (1994): Perceived Exertion Scales: Toward Development of Improved Verbal Anchors. In: Proceedings of the Human Factors and Ergonomics Society 38th Annual Meeting 1994. pp. 626-630.

“An experiment documented the choices of verbal anchors or word triggers by subjects observing five different videotaped work operations. Their surveyed numeric scalings and word selections were compiled to form a list of ten words which are recommended to describe amount or degree of work basing performed. This study acknowledges that there is inherent risk in applying words to work measurement scales, but the list may be helpful as a guide to choosing appropriate words to indicate work content or for job descriptions.”

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

1992
 
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Marley, Robert J. and Wehrman, Rob R. (1992): Grip Strength as a Function of Forearm Rotation and Elbow Posture. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. pp. 791-795.

“An investigation was performed to assess the effect of forearm rotation (pronation and supination) and elbow orientation upon maximum grip strength of 10 male and 10 female subjects. Seven positions of forearm rotation which ranged from 90 degrees pronation to 90 degrees supination in both the 90 degree elbow flexion (arm adducted, forearm horizontal) and 0 degree flexion (shoulder flexed, whole-arm extended forward and horizontal) postures were examined. Thus a total combination of 14 postures were documented. Results indicate that maximum grip strength decreased significantly with forearm pronation, relative to the "neutral" forearm posture (p = 0.086). Other rotation postures did not yield significantly different grip strength from the neutral, but there was a clear decreasing trend in grip strength with forearm rotation away from neutral, particularly in pronation. The 0 degree elbow flexion showed the highest average grip strength values compared to 90 degree elbow flexion postures. Also, in the 90 degree elbow flexion posture, grip strength tended to increase with some supination from neutral rotation. It is recommended that for repetitive grasping activities, the arm and forearm postures should be considered in evaluating maximum grip strength. A regression model is presented to estimate maximum grip strength as a function of forearm rotation and elbow posture.”

© All rights reserved Marley and Wehrman and/or Human Factors Society

1990
 
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Fernandez, Jeffrey E., Klein, Mary G., Learned, Valerie and Marley, Robert J. (1990): Isokinetic Wrist Strength of Females with Carpal Tunnel Syndrome. In: D., Woods, and E., Roth, (eds.) Proceedings of the Human Factors Society 34th Annual Meeting 1990, Santa Monica, USA. pp. 795-799.

“N/R”

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

1989
 
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Fernandez, Jeffrey E., Malzahn, Don E., Marley, Robert J. and Bonebrake, Alan R. (1989): A Study of Several Performance Measures of Workers with Carpal Tunnel Syndrome. In: Proceedings of the Human Factors Society 33rd Annual Meeting 1989. pp. 728-732.

“Objective measures of anthropometry, strength, range-of-motion, muscle activity, and task performance, and subjective ratings of pain were observed in a group of individuals diagnosed with carpal tunnel syndrome (CTS). These measures were compared to a control population showing no symptoms of CTS. Results indicate that individuals with CTS had significantly lower values on some strength tests, less range of motion on several measures, and reduced performance on a simulated task than did the control group. Ratings of pain and distress for the CTS group were also significantly higher than the control group. Occupational and personality factors associated with the CTS group were also identified and discussed.”

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

1988
 
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Fernandez, Jeffrey E., Pitetti, Kenneth H., Stubbs, Nancy B., Marley, Robert J. and Cihangirli, Mihriban (1988): A Comparison of Equations and Methods for Determining Percentage Body Fat. In: Proceedings of the Human Factors Society 32nd Annual Meeting 1988. pp. 558-562.

“An experiment was conducted to assess the differences between various equations and devices for estimating body fat percentage. Valid estimation of body fat is an important variable in determining the individual differences in energy expenditure or physical work capacities of workers performing various tasks. Twenty male volunteers participated in this study. Results indicate that no significant differences exist between device type. However, there were significant differences between derived estimations of body fat content with several widely used equations. These results were also related to estimation of body fat content derived from the bioelectrical impedance procedure. Results from this study indicate the need for comparison between subject population and population of prediction models before determining body fat and possible use of an average of several equations.”

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

1987
 
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Fernandez, Jeffrey E., Marley, Robert J. and Stubbs, Nancy B. (1987): Lifting Physical Work Capacity as a Function of Frequency. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 1331-1335.

“A laboratory experiment using 15 male subjects was conducted to document lifting physical work capacity over the frequency range of 2 to 12 lifts per minute and to compare these values to bicycling physical work capacity. Results indicate that bicycling PWC is significantly higher than lifting PWC at the 0.05 level. A variation in lifting PWC as a function of frequency was observed. This could be attributed to lifting technique. Task design should, therefore, not only consider lifting PWC but also the frequency of lift.”

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

 
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URL: http://www.interaction-design.org/references/authors/robert_j__marley.html

Publication statistics

Pub. period:1987-1994
Pub. count:6
Number of co-authors:11



Co-authors

Number of publications with 3 favourite co-authors:

Jeffrey E. Fernandez:4
Nancy B. Stubbs:2
Rob R. Wehrman:1

 

 

Productive colleagues

Robert J. Marley's 3 most productive colleagues in number of publications:

Jeffrey E. Fernand..:8
Nancy B. Stubbs:2
Rob R. Wehrman:1
 
 
 
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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