Standardized task strain and system response times in human-computer interaction

Article Abstract:

Stress can increase with any involuntary delays in human-computer interactions, such as system response times (SRTs). In an experiment conducted, 40 college-age subjects were randomly divided into an 'incentive' and a 'non-incentive' group. A computer task with SRTs of 0.5, 1.5, and 4.5 s were performed by the subjects. Various data such as physiological responses, subjective responses, and performance were collected during the task. The results showed that both long and short SRTs resulted in differential psychophysiological changes consistent with varied types of stress response.

Psychological aspects, Analysis, Stress (Psychology), Psychophysiology, Human-computer interaction

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Cognitive task analyses for decision centred design and training

Article Abstract:

Three case studies of Cognitive Task Analysis (CTA) for defining systems design and training requirements are described. A critical decision method form of CTA was utilized to extract information from expert white-water rafting guides and general aviation pilots and emergency ambulance dispatchers. In turn, the information obtained was used to develop multi-media tools for training rafting guides and general aviation pilots. Results indicated the utility of the approach to CTA that is based on relevant theory.

Research, Decision-making, Decision making, System design, Systems analysis, Cognition, Occupational training, Task analysis

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Task analysis in support of the design and development of a nuclear power plant safety system

Article Abstract:

A four-level Hierarchical Task Analysis of the design and applicability of a nuclear power plant safety system in several power stations reveals the existence of certain operational mistakes in this technique, which affects commissioning time. Computerized simulation methods enable rectification of these errors and make the technique less defective. Extreme environmental conditions also have impacts on the commissioning time.

Design and construction, Nuclear power plants

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