Explain how subjective sleepiness was measured

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Reference no: EM131771459

Question: Locate Original Source 11 on the CD, "Driving impairment due to sleepiness is exacerbated by low alcohol intake." Find the description of how the researchers measured "subjective sleepiness."

a. Explain how "subjective sleepiness" was measured.

b. Was "subjective sleepiness" measured as a nominal, ordinal, or measurement variable? Explain.

Reference no: EM131771459

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