Dr. K-C discussed a sleep study by Sculling (2019) in which students were given extra credit to sleep 8 or more hours per night. Half the students succeeded in sleeping 8+ hours per night and they did significantly better on the final exam compared to students who slept less than 8 hours per night. What aspect of this study allows for a strong conclusion that more sleep actually caused students to perform better academically? The study had only 34 participants After controlling for any differences in previous grades, 8-hour sleepers still did better on the final exam Students who slept 8+ hours per night already had better grades to begin with The amount of sleep per night was measured by student self-report
Dr. K-C discussed a sleep study by Sculling (2019) in which students were given extra credit to sleep 8 or more hours per night. Half the students succeeded in sleeping 8+ hours per night and they did significantly better on the final exam compared to students who slept less than 8 hours per night.
What aspect of this study allows for a strong conclusion that more sleep actually caused students to perform better academically?
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The study had only 34 participants |
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After controlling for any differences in previous grades, 8-hour sleepers still did better on the final exam |
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Students who slept 8+ hours per night already had better grades to begin with |
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The amount of sleep per night was measured by student self-report |
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