DEA 1500 Lecture Notes - Lecture 24: Thermal Comfort, Mental Model, Anthropometry
27 Apr 2018
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REVIEW
1. Human Factors and Ergonomics: where the object and the interaction meet
2. Cognitive Ergonomics: as you interface with the environment, how well you are able to
understand what you are supposed to do/what the function is
a. Legibility: can I see how to use something/what I am supposed to do
b. Affordance: concept map--understanding designer’s mental model and
comparing it to user’s mental model
i. Stove top--which knob turns on which burner?
c. Feedback: as I use something, do I get feedback on what’s happening/the
impact?
i. Using website to submit information--can you tell if you submitted it
successfully?
3. Anthropometrics and Biomechanics
a. Thinking about body as machine--dimensions like height, weight, width, reach,
mobility
i. Can create strain--carpal tunnel syndrome, for example
4. HER Process: Temperature/Thermal Environment
a. People are similar in what they find comfortable
b. Performance in heat
i. Duration is critical--hotter over long durations has biggest impact
ii. Tasks that are boring and require attentiveness (vigilance) are particularly
sensitive to high temperatures
c. Crime and temperature
i. Exceed thermal comfort → increase in interpersonal aggression, crime,
inter-group conflict
d. Climate change?
i. Suggests more aggression as avg. temperature rises worldwide
HER PROCESS: RISK
1. Probability: used to calculate and assess risk
a. Formal
i. Good sample, and you know what the population is
ii. Example: “what is the probability I will get a red ball out of the hat?”
1. Just doing it once=bad sample
2. Non-biased → ⅔ (since 6 red and 3 yellow)
b. Exceptional (more common)
i. “Is your life riskier today than when your grandparents were your age?”
1. Most college students say their lives are riskier now (~70%)
2. But life was much riskier for grandparents--life expectancy was
lower, serious injury, debilitating disease more likely for them
ii. Don’t have good sample, known population is unclear
iii. Example: questionnaire filled out by a male 6’5” or taller, but they did not
indicate their occupation. Are they a bank president or NBA player?
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Document Summary
Tasks that are boring and require attentiveness (vigilance) are particularly sensitive to high temperatures: crime and temperature. Suggests more aggression as avg. temperature rises worldwide. Her process: risk: probability: used to calculate and assess risk, formal, good sample, and you know what the population is. Example: what is the probability i will get a red ball out of the hat? : just doing it once=bad sample, non-biased (since 6 red and 3 yellow, exceptional (more common) Example: questionnaire filled out by a male 6"5 or taller, but they did not indicate their occupation. Information readily available to you in your consciousness and memory: overestimate the probability that the person"s occupation was an. Base rate=what about all the people smoking pot but are not using hard drugs: novelty & dread. Tend to overestimate risk if it does occur, it will be really catastrophic. If you think you can control your exposure to the risk, you tend to underestimate it.
