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HF- stress/workload

QuestionAnswer
physical stressors motion (vibration- high and low frequency), thermal factors, air quality
thermal factors best working temperatures winter- 68- 75 degrees summer- 73-79 degrees
air quality anoxia- lack of oxygen poor air quality ie. poor ventilation, pollution etc.
Psychological stressors (individual) Cognitive appraisal, level of arousal, performance and overarousal
cognitive arousal own perception of how risky a particular job is
cognitive appraisal-reasons 1. ability to understand risks involved 2. control of what you're doing or dependance on someone else
level of arousal too much stimulation, start new activity and its too much to handle
performance and over-arousal can go to lack of SA cognitive tunneling working memory loss
Workload overload- TIMELINE MODEL: when designing a system (4 STEPS) 1. ID task time- how long it takes to do task 2. prioritize-which tasks most important 3. resource demands and automation- can any tasks be automated? what resources are you using? (auditory, visual) 4. Multiple resources
Mental workload measurement (4 STEPS) 1. primary task 2. secondary task- if can do second task as well, not overloaded with work 3physiological measures- blink rate, heart rate 4. subjective measures
Fatigue and Sleep disruption- impact on performance stress sleep- ability to fall and stay asleep
***vigilance and under arousal*** causes 1. time- longer doing task, worse we become 2. event salience- likelihood what were looking for catches attention 3. signal rate- rate the tasks occur 4. arousal rate- attentional resources; high or low levels of workload
Remediation (3 SOLUTIONS) 1. frequent rest breaks 2. make signals more salient 3. increase payoffs (incentives)
Sleep deprivation and performance sleep requirement decreases with age to perform tasks at normal level time spent dreaming decreases with age
circadian rhythms body used to routine (sleep, eating etc.) disruption results in performance issues
circadian disruption 1. jet lag 2. shift work 3. seasonal affective disorder
Created by: SmashleySue
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