9

Set 1: Command of Evidence (Intermediate)

Explanation

Answer: C

PASSAGE

A study on sleep deprivation showed that participants who slept 4 hours a night for a week performed as poorly on cognitive tests as those who stayed awake for 48 hours straight. Crucially, the 4-hour group reported feeling 'fine', while the 48-hour group reportedly felt exhausted.

What does this study suggest about chronic sleep deprivation?

A. It is less harmful than acute sleep deprivation.
B. People are poor judges of their own cognitive impairment when sleep deprived chronically.
C. Cognitive performance improves after one week of low sleep.✓ Correct
D. Feeling 'fine' is an accurate indicator of mental sharpness.

Detailed Explanation

The 4-hour group performed poorly (impaired) but FELT 'fine'. This discrepancy indicates they could not accurately judge their own impairment level.

Key Evidence:

• "performed as poorly"

• "reported feeling 'fine'"

Why others are wrong: A (Performance was equal ('as poorly'), not less harmful.), C (Performance was poor, not improved.), D (The study proves the opposite; feeling fine did NOT mean they were sharp.).

← PreviousNext →