Task performance

The reason for reduction in performance is that ill-fitting handwear will shear between the fingertip and the surface of an object, confusing the brain through sensory stimulus from mechauoproprioceptors in the fingertips compared with muscle and joint receptors as to the trae position of surface features on the object. Stiff and thick materials reduce the fidelity of the object surface detail transmitted 

The contribution of footwear to task performance is primarily protection of the foot on various abrasive surfaces and support of the ankle. However, a critical component of military footwear for mobility is the sole of the boot or shoe. There have been studies in ground reaction by Salford University, resirlting in some indicators of what configurations ofbootsole work best with different characterised ground conditions (Pisani, 2002). Critical elements of this work include the interaction between the surface detail of the sole, particirlarly the cleat of the shoe or boot, and shear of soil material away from the sole (Sun et al, 2005). 

The characteristics of the soil from muddy farmland are very different from rocky moimtainous terrain. The angle of the cleat, which forms part of the grip pattern, can help grip the soil material whilst releasing it when the foot is lifted off at the end of the walking or t cycle. Materials within the cleat may also assist in the release of soil fiom its sidewall. The use of silicone as part of the cleat sidewall, which does not directly involve friction grip onto an object surface, has been considered to help the release of soil materials. 

Handwear fit can make a significant difiference to haptic and dexterity performance this has already been considered in an earlier section. Ensuring that 

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The thinking interval is the difference between 30 second, and third tasks performe d minutes (the total available time) and the sum of a) the time Hues are success, broken liiu s... 

The practical implications of this experiment are that when evaluating the effects of shift work due to circadian effects, the type of task being carried out by the worker must be taken into account. For example, skill-based tasks would be expected to exhibit the performance changes characteristic of low memory load tasks, whereas performance variations in knowledge-based tasks would be expected to follow the pattern of high memory load tasks. Performance on rule-based tasks may depend on the degree of frequency of use of the rules, which in turn may determine the memory load. If these results were confirmed by further process plant studies, it would have implications for when different types of operation (involving different levels of memory load) should be scheduled to reduce circadian rhythm effects and minimize errors. 

Discussions and interviews with the task experts can be supplemented with observations of their actual performance, for example, taking notes on certain aspects of the task or taking video or audio recordings. Observational techniques can reveal information that may be difficult to acquire in any other way. Detailed physical task performance data can be recorded, and major environmental influences (e.g., noise, light, interruptions) can all be faithfully represented. Observations can also provide an insight into the way that the team members communicate, allocate job responsibilities, and make use of operating procedures and other resources. 

This checklist presents detailed information for assessing VDU terminals and their workplaces. The items concern technical information about VDU characteristics but they do not directly consider the nature of the task performed using the VDU system. 

Monk, T. H., Embrey, D. E. (1981). A Field Study of Circadian Rhythms in Actual and Interpolated Task Performance. In A. Reinberg, N. Vieux, P. Andlauer (Eds.), Night and Shift Work Biological and Social Aspects. Oxford, UK Pergamon Press. 

The rapid increase in computer applications is partly attributable to both the decreasing costs of hardware and software and to the increasing costs of human labor. This shift has given rise to a productivity factor assigned to various tasks performed by computers versus people. One figure recently quoted was a minimum factor of 4 to 5 for CAD (computer aided design), that is, one draftsman with a CAD system can replace 4 to 5 manual draftsmen. 

Discharging die patient from die area to his or her room or odier specified area The nurse must record all drug administered and nursing tasks performed before the patient leaves die postanesthesia recovery room. 

Fiorea, S. M., Cuevasa, H. M., Oser, R. L. (2003). A picture is worth a thousand connections The faeilitative effects of diagrams on mental model development and task performance. Computers in Human Behavior, 19(2), 185-199. 

The discovery that mass spectrometry would soon usurp many of the tasks performed by radioactive counting was in itself serendipitous. It came about because a fundamental issue in cosmochemistry was at stake. Although variation in had... 

Landrum, R., Meliska, C. and Loke, W., Effects of caffeine and task experience on task performance. Psychologia Int J Psych Orient 37, 801-812, 1988. 

Edwards, S., Brice, L., Craig, C. and Perri-Jones, R., Effects of caffeine, practice and mode of presentation on Stroop task performance. Pharmacol Biochem Behav 54(2), 309-315, 1996. 

Ratliff-Crain, J., O Keeffe, M. K., and Baum, A., Cardiovascular reactivity, mood, and task performance in deprived and nondeprived coffee drinkers. Health-Psychology 8(4), 427-447, 1989. 

Smith, B., Davidosn, R., Smith, D., Goldstein, H. and Perlstein, W., Sensation seeking and arousal Effects of strong stimulation on electrodermal activation and memory task performance. Personality and Individual Differences 6, 671-679, 1989. 

Some of the tasks performed by the menu selections invoke utility programs that are supplied with the computer s operating system, while other tasks are FORTRAN programs written specifically for our application. 

Cannabinoid receptors are expressed throughout the cerebral cortex and the hippocampus, and a subpopulation of these cells appear to show an unusually high level of activity. It is possible that cells in these areas modulate the sensory effects of cannabis, particularly the effects on perception, task performance and memory. In addition, the anticonvulsant properties of cannabis are believed to be mediated here. Parts of the hypothalamus show high levels of receptor sites for cannabinoids this may be related to hypothermia effects. High levels in the cerebellum may be related to mediating the property of cannabinoids that produces the reduction in ataxic (muscle co-ordination) symptoms in certain disorders (Herkenham et al., 1991). 

Gilbert AN, Knasko SC and Sabini J (1997). Sex differences in task performance associated with attention to ambient odour. Archives of Environmental Health, 52, 195-199. 

Parrott AC, Garnham NJ, Wesnes K and Pincock C (1996). Cigarette smoking and abstinence Comparative effects upon cognitive task performance and mood state over 24 hours. Human Psychopharmacology, 11, 391-400. 

White, T. L. and Youngentob, S. L. The effect of NMDA-NR2B receptor subunit over-expression on olfactory memory task performance in the mouse. Brain Res. 1021,1-7, 2004. 

End user Intuitive and correct behavior, helps do tasks, performance, reliability... 

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