A Study of a Drug to Prevent Hair Loss Showed

question 13

Multiple Choice

A study of a drug to prevent hair loss showed that 86% of the men who took it maintained or increased the amount of hair on their heads. But so did 42% of the men in the same study who took a placebo instead of the drug. This is an example of

• A) a sampling error: The study should not have included men whose hair grew without the drug.
• B) the placebo effect.
• C) an error in calculating percentages.
• D) failure to use the double-blind idea.

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Definitions:

Continuity

The psychological principle that development is gradual and continuous rather than in separate stages.

Autonomic Nervous System

The part of the nervous system responsible for controlling involuntary bodily functions, including heart rate, digestion, and respiratory rate.

Sympathetic Nervous System

Part of the autonomic nervous system responsible for the body's 'fight or flight' response to stress or danger.

Bodily Arousal

A physiological response to stimuli, characterized by an increase in energy, alertness, and readiness for action.