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Publication statistics
Pub. period:1987-2012
Pub. count:9
Number of co-authors:9
Co-authors
Number of publications with 3 favourite co-authors:
Steven L. Sauter:3George V. Kissel:2
Edward F. Krieg:2
Productive colleagues
Robert A. Henning's 3 most productive colleagues in number of publications:
Steven L. Sauter:13Glenn F. Wilson:13
George V. Kissel:3
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“ Civilization advances by extending the number of important operations which we can perform without thinking of them. ”
-- Alfred North Whitehead
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Robert A. Henning
Publications by Robert A. Henning (bibliography)
2012
Dove-Steinkamp, Megan L. and Henning, Robert A. (2012): Training under Imposed Communication Delays Benefits Performance Effectiveness of Distributed Teams. In: Proceedings of the Human Factors and Ergonomics Society 2012 Annual Meeting 2012. pp. 2432-2436.
“A laboratory study was conducted to investigate whether introduction of auditory transmission delays during skill acquisition can benefit the performance effectiveness of distributed teams. Two-person university student teams (N = 40) performed a simulated firefighting task throughout which intra-team communications were systematically perturbed with closed-loop transmission delays ranging from 2 to 6 seconds. On average, team performance improved with practice, but significant differences in performance were observed depending on the length and manner delays were introduced: short (2s blocked) practice delay was associated with mediocre performance throughout, whereas longer (4s, 6s) practice delays were associated with improved performance during practice and also in the final transfer trial with a novel 4s delay, regardless of presentation schedule (blocked versus random). Results suggest introduction of relatively long or random communication delays can accelerate team skill acquisition and benefit team performance in a novel setting.”
© All rights reserved Dove-Steinkamp and Henning and/or Human Factors and Ergonomics Society
1995
Henning, Robert A. and Wilson, Glenn F. (1995): Evaluation of Work Schedules Using Psychophysiological Measures. In: Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting 1995. p. 779.
“While the primary goal of this symposium is to demonstrate the utility of psychophysiological measures in the evaluation of work schedules, the more general goal is to promote the use of psychophysiological measures in organizational design and management research. There are several good reasons to include psychophysiological measures in ergonomic evaluations. Foremost among these is that the information provided about worker well-being and performance capabilities cannot be obtained in other ways. Psychophysiological measures provide continuous, non-invasive, and objective measurement of an individual's response to work activities. Because of known relationships between physiological mechanisms and behavior, work-induced changes in physiological response can be used to monitor the effects of organizational design on work demand or recovery. Most would agree, however, that psychophysiological measures are seldom meaningful unless they are collected and analyzed in conjunction with other measures. In particular, psychophysiological measures can provide crucial information about worker well-being when subjective reports of distress or discomfort are biased by psychosocial factors, and also when workers compensate for increases or decreases in work demand by drawing on reserve capacity. In cases where performance measures or subjective reports are more reliable, measurement of psychophysiological responses can provide convergent results that add to the scientific validity of the research investigation. This explains why all researchers in this symposium use a balanced approach and analyze performance and/or subjective ratings in combination with psychophysiological measures. Beyond the scientific rationale for including psychophysiological measures in ergonomics research, many of the practical difficulties researchers faced in the past have been eliminated by recent technological advances. Modern heart rate monitoring systems, for example, have noise suppression features that improve signal quality and allow data collection in real work settings. Portable data loggers enable researchers to monitor multiple physiological response measures over 24-hour periods. Handling large data sets is no longer a problem because the digital storage capability of small computers is nearly unbounded. Data analysis software, such as time series analysis, has become more sophisticated and easier to use. What all this means in practical terms is that it is no longer necessary to dedicate a major portion of one's career to surmount the technical problems associated with psychophysiological research. The wide range of work scheduling topics covered in this symposium is a good example of the utility of psychophysiological measures in ergonomics research. Specific work scheduling topics include: appropriate rest break length at different times of the work day to ensure adequate recovery from sustained cognitive demand (Boucsein and Thum), methods for verifying the health and safety of underground miners working 12-hour shifts in shortened work weeks (Duchon and Smith), the impact of self-managed rest breaks on well-being during continuous computer work (Henning, Callaghan, Guttman, and Braun), and how assessing work efficiency during a cognitive task can be used to evaluate the effectiveness of work/rest schedules (Meijman). While the specific goals of these studies may differ, in each case the use of psychophysiological measures enhances the scientific validity of the research and provides important information about the relationship between work schedule design and worker well-being.”
© All rights reserved Henning and Wilson and/or Human Factors Society
Henning, Robert A., Callaghan, Eric A., Guttman, Jason I. and Braun, Heather A. (1995): Evaluation of Two Self-Managed Rest Break Systems for VDT Users. In: Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting 1995. pp. 780-784.
“Two self-managed rest break systems for video display terminal (VDT) users were evaluated using measures of heart rate and heart rate variability, breathing, and work-physiological synchronization in addition to conventional measures of performance, mood, user acceptance, and musculoskeletal discomfort. Undergraduate typists (N=30) entered lines of randomized words during a 55-min work period. Cognitive demand was increased by having typists reverse-type a specified word in each line. In the feedback condition, typists were continuously informed of the discrepancy between a target rest break standard of 30 s every 8 min and their discretionary rest breaks. This feedback information was absent in the control condition. Management of discretionary rest breaks was better in the feedback condition and VDT users reported less task disruption and lower back discomfort. Time-related trends in performance and physiological response reflected behavioral changes associated with fatigue, but did not differentiate between experimental conditions. The lack of adverse psychophysiological responses in the feedback condition supports the conclusion that continuous feedback about rest break behavior can help VDT users self-manage discretionary rest breaks, with no untoward effects on performance or well-being.”
© All rights reserved Henning et al. and/or Human Factors Society
1994
Kissel, George V. and Henning, Robert A. (1994): Work Design, Smoking Behavior, and the Productivity and Well-Being of VDT Operators: The Results of a Field Study. In: Proceedings of the Human Factors and Ergonomics Society 38th Annual Meeting 1994. p. 975.
“A workplace intervention of scheduling frequent breaks from computer work was used at two work sites (N=91) to determine if smokers (N=33) and non-smokers respond differently to changes in organizational design. The experimental conditions were: 1) control, 2) additional rest breaks only, and 3) additional rest breaks with stretching exercises. Operators at Site 1 were assigned to one of the three conditions, while at Site 2, operators received the three conditions in the order listed above. The breaks or breaks and exercises occurred every 15-min. Operators completed surveys daily to assess mood, perceived work effort, and social interaction. Measures of productivity and smoking behavior were also collected. Smokers reported feeling less relaxed, less vigorous and more fatigued than non-smokers at Site 1. At Site 2, smokers reported feeling less relaxed but less active and more vigorous than non-smokers and smokers reported more social interaction and were more productive than non-smokers. With added breaks, smokers at Site 1 reported decreased fatigue, while at Site 2, both smokers and non-smokers reported increased relaxation. Therefore, smokers and non-smokers were found to differ in their responses to organizational design. In addition, the workplace intervention of added rest breaks benefited smokers more than non-smokers. These results suggest that smokers differ from non-smokers in their reactions to organizational factors in the workplace and that smokers may use smoking behavior as a means to adjust to organizational demands. Therefore, smoking behavior merits consideration as an important mitigating factor when the effects of organizational interventions on worker productivity and well-being are being considered or evaluated. Given the current trend towards smoke-free workplaces, the impact of factors like those identified in this field study should be considered when efforts are made to promote smoking cessation programs in the workplace.”
© All rights reserved Kissel and Henning and/or Human Factors Society
1993
Henning, Robert A., Kissel, George V. and Maynard, Douglas C. (1993): A Compensatory Rest Break System for VDT Operators. In: Proceedings of the Human Factors and Ergonomics Society 37th Annual Meeting 1993. pp. 905-909.
“Short rest breaks at 10 or 15-min intervals are being proposed as a means to moderate health problems and discomfort associated with continuous VDT use. This laboratory study evaluated an alternative to administering frequent breaks on a regimented schedule; short breaks were not administered unless the operator's spontaneous rest pauses were insufficient. Undergraduate volunteer typists (N=38) were assigned to one of two conditions: regimented (20-sec breaks every 5 min), or compensatory (20-sec breaks every 5 min only if the spontaneous pauses did not total 20 sac). Participants entered lines of randomized upper and lower-case characters that appeared on their VDT during a 48-min work period. Mood and musculoskeletal discomfort were assessed before and after the work period, followed by a questionnaire about the break system. Performance measures included keystroke output, error rate, and correction rate (backspace use). Large pre-to-post work period differences in both mood and musculoskeletal discomfort were found. Both the number and length of computer-administered breaks decreased in the compensatory condition. Back discomfort was lower in the compensatory condition, however, no differences in performance, mood, nor acceptance of the break system were found. These results indicate that rest breaks administered on a compensatory basis during repetitive computer work can eliminate unnecessary breaks and improve well-being without being any more disruptive to work than regimented breaks.”
© All rights reserved Henning et al. and/or Human Factors Society
1992
Henning, Robert A., Sauter, Steven L. and Krieg, Edward F. (1992): Work Rhythm and Physiological Rhythms in Repetitive Computer Work: Effects of Synchronization on Well-Being. In International Journal of Human-Computer Interaction, 4 (3) pp. 233-243.
“This study tested the hypothesis that asynchrony between the work rhythm and a worker's internal physiological rhythms may be a source of stress in repetitive computer work. Experienced typists (N=20) entered lines of numeric data using a video display terminal in a simulated office environment. Each day of the 2-day experiment consisted of six 40-min work periods. The work rhythm was varied between work periods by adjusting the field length of data entry lines (3-13 characters). Breathing and cardiac responses were monitored continuously throughout work periods, and a mood survey was administered at the end of each work period. The extent of synchronization between (1) breathing response and the work rhythm, (2) cardiac response and the work rhythm, and (3) all three measures (breathing and cardiac responses, and the work rhythm) was scored for each work period using cross-spectral analysis. Synchronization scores were then evaluated as predictors of mood state and physiological response using multiple regression techniques. Results indicated that synchronization between the work rhythm and breathing response was predictive of reduced heart rate and increased heart rate variability (suggesting reduced stress). Synchronization between the work rhythm and cardiac response was predictive of both reduced fatigue and reduced boredom. Synchronization among all three measures (breathing and cardiac responses, and the work rhythm) was predictive of reduced boredom and reduced heart rate. These results suggest that the uncoupling of work and physiological rhythms may partly explain worker dissatisfaction and health complaints in highly regimented, computer-based tasks.”
© All rights reserved Henning et al. and/or Lawrence Erlbaum Associates
1991
Henning, Robert A. and Sauter, Steven L. (1991): Work-Physiological Synchronization and Well-Being in a Repetitive Task. In: Proceedings of the Human Factors Society 35th Annual Meeting 1991. pp. 781-784.
1988
Henning, Robert A., Krieg, Edward F. and Sauter, Steven L. (1988): Effects of Social Interaction on Performance and Mood State During Computer-Based Data Entry Work. In: Proceedings of the Human Factors Society 32nd Annual Meeting 1988. pp. 506-510.
“The effects of social interaction on performance and mood state were investigated for computer-based data entry work. A highly repetitive, screen-based, numeric data entry task was performed in a laboratory environment. Experienced data entry workers (N=16) performed the task under social and nonsocial conditions. Pairs of subjects worked at a room divider prevented visual contact and conversation was not permitted. During the nonsocial condition a room divider prevented visual contact and conversation was not permitted. During the social condition visual contact and conversation were permitted. Each condition consisted of three, 40-min work periods separated by 10-min rest breaks away from the workstation. The two subjects entered lines of data which had the same or an unequal number of characters so that interactions between task similarity and social/nonsocial conditions could be evaluated. Keystroke output, error rate, and the number of character corrections with the backspace key were scored for each work period. In addition, a survey of mood state was administered before and after each work period. Data analyses indicated that tension, irritation, perceived stress and error rate were less in the social condition. No effect on total keystroke output or backspace use was found in the social condition. No interaction between task similarity conditions and social/nonsocial conditions was found. These results suggest that social interaction during data entry work can benefit worker well-being and error rate performance without significantly affecting keystroke output. These results have implications for the design of work environments for data entry workers.”
© All rights reserved Henning et al. and/or Human Factors Society
1987
Henning, Robert A. (1987): Work Rhythm and Breathing Rhythm in a Repetitive Perceptual-Motor Task: The Effects of Synchronization on Performance. In: Proceedings of the Human Factors Society 31st Annual Meeting 1987. pp. 1336-1340.
“A laboratory investigation was conducted to determine if synchronization between the work rhythm and the respiratory biorhythm benefits perceptual-motor performance. The effect of work-respiratory (W-R) synchronization on reaction time, error rate, and perceived difficulty was evaluated for a visual choice reaction time task. Interstimulus intervals were chosen to induce a work rhythm. Prior to the experiment, the task was performed in a self-paced mode so that a baseline work rate could be identified for each subject. Each subject (N=22) then performed the task at 3 machine-paced work rhythms; 1) equal to the work rhythm of the baseline work rate, 2) 33% faster than the work rhythm of the baseline work rate, and 3) 33% slower than the work rhythm of the baseline work rate. Each condition consisted to two, 4 min trials separated by a brief rest break. Work rate (in responses per minute) was held constant across conditions through adjustments in task structure. Regression analysis revealed that W-R synchronization was associated with a 1% reduction in error rate and a 15 msec reduction in reaction time. These results suggest that W-R synchronization benefits perceptual-motor performance of repetitive tasks.”
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Page maintainer: The Editorial TeamURL: http://www.interaction-design.org/references/authors/robert_a__henning.html
Publication statistics
Pub. period:1987-2012
Pub. count:9
Number of co-authors:9
Co-authors
Number of publications with 3 favourite co-authors:
Steven L. Sauter:3George V. Kissel:2
Edward F. Krieg:2
Productive colleagues
Robert A. Henning's 3 most productive colleagues in number of publications:
Steven L. Sauter:13Glenn F. Wilson:13
George V. Kissel:3
Calendar
May 28
May
25
“ Civilization advances by extending the number of important operations which we can perform without thinking of them. ”
-- Alfred North Whitehead
- Share this quote on...
- Get more quotes via RSS or by joining our Usability Quote of the Day Facebook Page
Featured chapter
Read the fascinating history of Wearable Computing, told by its father, Steve Mann
Read Steve's chapter !
