Why did the researchers avoid studying students' sleep habits around final exams and term papers?

Question

BlackTom AI · Accepted Answer

Researchers avoided those windows because exam and paper deadlines introduce acute stress that alters sleep, creating atypical, non-representative data.

Relevant knowledge points: research design and control of confounding variables; the physiological and behavioral effects of stress on sleep (shortened duration, fragmented sleep, shifted timing); and the goal of sampling typical habitual sleep rather than transient responses to extraordinary events. In observational sleep studies, periods of high academic stress are known to disrupt regular patterns, so researchers commonly exclude them to measure baseline behavior.

Step-by-step reasoning:
1. Identify the objective: the study aimed to describe students’ usual sleep habits, not their responses to short-term stressors.
2. Recognize that final exams and term papers are acute stressors that change sleep quantity, quality, and timing (e.g., all-nighters, delayed bedtimes, increased awakenings).
3. Determine that including data from those periods would introduce a confounding influence—stress—making it hard to separate normal sleep habits from stress-induced changes.
4. Conclude that to preserve internal validity and obtain generalizable estimates of habitual sleep, researchers deliberately avoided measuring during those atypical periods.

Why the correct answer is correct: "They believed students would be too stressed during exams" directly addresses the confounding effect of stress. This is the standard, explicit reason researchers exclude exam periods: stress would distort sleep measures and undermine the study’s goal of capturing typical behavior.

Why the other options are incorrect:
- "They wanted to focus on the beginning of the semester…" might be another sampling choice but does not explain why exams were excluded; it’s speculative.
- "They assumed students would sleep more during this period" is false; exams typically reduce sleep, not increase it.
- "They found that sleep habits were more regular during exams" contradicts empirical evidence and the rationale for exclusion.

Conclusion: Excluding finals and term papers was done because researchers believed students would be too stressed during exams, which matches the provided correct answer.

Why did the researchers avoid studying students' sleep habits around final exams and term papers?单项选择题

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