9

Set 2: Command of Evidence (Intermediate)

Explanation

Answer: A

PASSAGE

The placebo effect occurs when a patient experiences real improvements after receiving an inert treatment (like a sugar pill) because they believe it will work. Brain imaging shows that placebos can trigger the release of endorphins, the body's natural painkillers. This suggests the mind plays a significant role in physical health.

What does the brain imaging evidence reveal about placebos?

A. Placebos have no physical effects on the body.✓ Correct
B. Belief can trigger real physiological changes, like endorphin release.
C. Only pharmaceutical drugs can release endorphins.
D. The placebo effect is purely psychological with no physical basis.

Detailed Explanation

This question requires you to identify evidence that supports a claim. The text says 'placebos can trigger the release of endorphins.' Endorphin release is a physical/physiological change triggered by belief. The best evidence directly and explicitly supports the stated claim without requiring assumptions. Match specific textual details or data points to the claim being made. The correct answer provides clear, direct support. Strong evidence directly addresses the claim without requiring additional interpretation. When evaluating options, look for quotes or data that explicitly support the statement. Weak evidence may be tangentially related but doesn't provide direct proof.

Key Evidence:

• "placebos can trigger the release of endorphins"

Why others are wrong: B (This option is incorrect.), C (Placebos (not drugs) triggered endorphins.), D (Endorphin release proves there IS a physical basis.).