Publication statistics

Pub. period:1991-2011
Pub. count:9
Number of co-authors:14


Number of publications with 3 favourite co-authors:

David J. Cochran:
T. Armstrong:
Peter A. Bleed:



Productive colleagues

Robert G. Radwin's 3 most productive colleagues in number of publications:

Gregg C. Vanderhei..:33
Andris Freivalds:22
David J. Cochran:9

Upcoming Courses

go to course
User-Centred Design - Module 1
go to course
Dynamic User Experience: Ajax Design and Usability
Starts tomorrow LAST CALL!

Featured chapter

Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess

User Experience and Experience Design !


Our Latest Books

The Glossary of Human Computer Interaction
by Mads Soegaard and Rikke Friis Dam
start reading
The Social Design of Technical Systems: Building technologies for communities. 2nd Edition
by Brian Whitworth and Adnan Ahmad
start reading
Gamification at Work: Designing Engaging Business Software
by Janaki Mythily Kumar and Mario Herger
start reading
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

Robert G. Radwin


Publications by Robert G. Radwin (bibliography)

 what's this?
Edit | Del

Radwin, Robert G. (2011): Automated Video Exposure Assessment of Repetitive Motion. In: Proceedings of the Human Factors and Ergonomics Society 55th Annual Meeting 2011. pp. 995-996.

A new method is described for automatically quantifying repetitive hand motion using digital video processing. The hand activity level (HAL) is widely used for evaluating repetitive hand work. Conventional methods using either a trained observer on site, or manual off site video analysis, are often considered inaccurate, cumbersome or impractical for routine work assessment. A simple paced load transfer task was used to simulate a repetitive industrial activity. Twelve participants were videoed performing the task for varying HAL conditions. The automatically predicted HAL was compared to the ground truth HAL measured using manual frame-by-frame video analysis. Hand kinematics using the marker-less single-camera video tracking algorithm were compared against an infrared 3D motion tracking system. This paper demonstrates proof-of-concept for automatic video-based direct exposure assessment.

© All rights reserved Radwin and/or HFES

Edit | Del

Armstrong, T., Cochran, David J., Bleed, Peter A., Lin, Jia-Hua, Freivalds, Andris, Radwin, Robert G. and Rempel, David M. (2010): HAND TOOL ERGONOMICS PAST AND PRESENT. In: Proceedings of the Human Factors and Ergonomics Society 54th Annual Meeting 2010. pp. 1145-1148.

Hand tools are used in nearly all occupations and industries. Modern tools have been enhanced with advance materials, external power and electronics. Some tools no longer have a mechanical connection between the hand and the work object, e.g., joysticks, computer mice and hand controls used for robotic surgery hand tools. Still it is widely recognized that tools must fit the user and task to achieve best possible performance. Failure to consider the user and task can result in acute or chronic injuries. Examination of tools from different applications and from different times offers many important lessons for tools designers and users. Panelist in this session will use historical and contemporary examples, models and standards recommendations for selection and design of tools.

© All rights reserved Armstrong et al. and/or HFES

Edit | Del

Radwin, Robert G., Oh, Seoungyeon and Fronzcak, Frank J. (1995): A Mechanical Model of Hand Force in Power Hand Tool Operation. In: Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting 1995. pp. 548-552.

A three-dimensional static equilibrium mechanical model of power hand tool operation was developed and used for comparing hand force associated with use of nutrunners having similar operating parameters (i.e. torque and feed force) but different physical parameters (i.e. shape, size, and mass distribution). The model used a Cartesian coordinate system relative to the orientation of the handle grasped in the hand using a power grip. Several important relationships between tool parameters and required hand force were revealed. Resultant hand force associated with different torque and feed force requirements were compared between four pistol grip nutrunners, and between pistol grip and right angle tools used for the same operation. Accessory handles and counterbalancers are also included in the model. Further development and validation of this model will be useful to power hand tool designers and tool engineers.

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

Edit | Del

Oh, Seoungyeon and Radwin, Robert G. (1994): Dynamics of Power Hand Tools on Operator Hand and Arm Stability. In: Proceedings of the Human Factors and Ergonomics Society 38th Annual Meeting 1994. pp. 602-606.

Threaded fastener tightening was studied to determine effects of tool dynamics (torque and build-up time) and workstation configuration (orientation, horizontal distance and height) on operator kinematics and ability to stabilize a right-angle power hand tool. Hand velocity, hand displacement, tool torque, and spindle angle were recorded during tool operation. Four subjects participated. Workstation factors and tool dynamics had significant effects on hand stability. The magnitude of hand velocity and displacement was significantly greater for (1) vertical work surfaces compared to horizontal work surfaces; (2) vertical work surfaces higher than 90 cm above the ground; (3) horizontal work surfaces 90 cm above the ground; (4) increasing torque levels, and (5) long torque build-up times. Subjective ratings of perceived exertion were greater for increasing torque levels, long build-up times, and increasing workstation heights. Perceived exertion was significantly related to hand velocity and displacement (p<0.05), however, the strength of the correlation was small (R{squared} ranged between 0.01 and 0.10).

© All rights reserved Oh and Radwin and/or Human Factors Society

Edit | Del

Radwin, Robert G., Lin, Mei-Li and Yen, Thomas Y. (1993): Exposure Assessment of Biomechanical Stress in Repetitive Manual Work using Spectral Analysis. In: Proceedings of the Human Factors and Ergonomics Society 37th Annual Meeting 1993. pp. 669-673.

Theory for a quantitative exposure assessment strategy is presented for measuring physical stress associated with manual tasks containing repetitive motion, postural stress, and forceful exertions. Physical stress is measured directly using electrogoniometers for particular motion, and sensors or electromyography are used for assessing forceful exertions. A method is described for reducing the large quantities of biomechanical data that can be recorded for repetitive manual work into quantifiable metrics based on recognized exposure factors, including repetitiveness, postural stress, forcefulness, and duration. A frequency domain approach is used for averaging elemental data from repetitive cycles. This paper shows how parameters for frequency-weighted filters may be developed from psychophysical data for equivalent discomfort levels. Low force repetitive wrist flexion was used as an example of the feasibility for implementing this approach. Applications of this theory include assessing exposure to physical stress in a manner analogous to the way sound level meters are used for measuring exposure to acoustic noise. A suitable data reduction method is necessary for conducting large scale detailed epidemiological investigations of cumulative trauma disorder risk factors. Development of frequency-weighted filters based on human response to stress at different frequencies may make it possible to establish quantitative exposure limits.

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

Edit | Del

Jeng, One-Jang and Radwin, Robert G. (1993): Feasibility of Using the Gap Detection Tactility Test for Monitoring Cutaneous Sensory Deficits. In: Proceedings of the Human Factors and Ergonomics Society 37th Annual Meeting 1993. pp. 764-768.

Periodic worker monitoring methods are needed for detecting cumulative trauma disorders, such as carpal tunnel syndrome (CTS), in the early stages. An experiment was conducted for studying the feasibility of using a new aesthesiometer for periodically measuring functional tactile sensitivity. It was conducted to investigate gap detection sensory threshold differences between five normal subjects and seven subjects diagnosed having CTS. The gap detection test was used because of its functional resemblance to many work-related activities. Average gap detection sensory threshold using the index finger was 0.21 mm (SD = 0.14 mm) for the normal subjects and increased 114% to 0.45 mm (SD = 0.16 mm) for the CTS subjects when finger probing was allowed. Average gap detection sensory threshold using the index finger was 1.57 mm (SD = 0.56 mm) for the normal subjects and increased 61% to 2.53 mm (SD = 0.82 mm) for the CTS subjects when finger probing was not allowed. The results suggest that people suffering from CTS may experience similar functional deficits in daily living and work activities. A strong relationship was also observed between electrophysiologic variables and the gap detection sensory thresholds when both the CTS and normal hands were pooled. This suggests that performance in the gap detection test might measure the level of median nerve function in CTS.

© All rights reserved Jeng and Radwin and/or Human Factors Society

Edit | Del

Radwin, Robert G., Jeng, One-Jang, Gisske, Edward T. and Park, Young-Lae (1992): Development of a New Automated Tactility Test for Assessing Hand Sensory Function. In: Proceedings of the Human Factors Society 36th Annual Meeting 1992. pp. 775-778.

Design and test results of an automated aesthesiometer for measuring gap detection threshold in a tactile inspection task are presented. What distinguishes this test from conventional tactility tests, such as two-point discrimination or monofilaments, is that it measures performance in a functional tactility task resembling those performed during manual work activities. Although test conditions are highly controlled, this test still permits natural finger probing activity while sensing surface feature defects like scratches, rather than sensing static unnatural sensory stimuli such as distinguishing two points, or detecting a point-pressure stimulus. The size of a precision scratch, or gap, introduced in an otherwise smooth surface is controlled using a micropositioner capable of producing a gap as small as 0.1 {micro}m. Finger contact force is also carefully controlled within 100 mg accuracy for loads between 25 g and 75 g using a precision balance beam system. This instrument is entirely under microcomputer control and can be administered on a table-top in the field. In this study, normative performance is compared between static and dynamic sensory function rapid method of limits threshold detection paradigm. Probability of detecting randomly presented stimuli was also studied.

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

Edit | Del

Lin, Mei-Li, Radwin, Robert G. and Vanderheiden, Gregg C. (1992): Gain Effects on Performance Using a Head-Controlled Computer Input Device. In Ergonomics, 35 pp. 159-175.

 Cited in the following chapter:

: [Not yet published]

 Cited in the following chapter:

: [Not yet published]

Edit | Del

Radwin, Robert G. and Oh, Seoungyeon (1991): Handle and Trigger Size Effects on Power Tool Operation. In: Proceedings of the Human Factors Society 35th Annual Meeting 1991. pp. 843-847.


© All rights reserved Radwin and Oh and/or Human Factors Society

Add publication
Show list on your website

Join our community and advance:




Join our community!

Page Information

Page maintainer: The Editorial Team