Dr Wilkins Randomly Assigns Subjects to One of Two Groups

question 1

Multiple Choice

Dr. Wilkins randomly assigns subjects to one of two groups. He is interested in the effects of caffeine on anxiety levels. He gives subjects in the first group an extra two cups of coffee a day for six months. The second group receives an extra two cups of decaffeinated coffee a day for the same time period. Importantly, subjects do not know whether they are being given regular or decaffeinated coffee. By providing one group with decaffeinated coffee, Dr. Wilkins is trying to account for which potential element of the experiment?

• A) participant fraud
• B) inter-rater reliability
• C) the placebo effect
• D) variability

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Definitions:

Angiotensin-Converting Enzyme

A key enzyme in the renin-angiotensin system, involved in regulating blood pressure by converting angiotensin I to the potent vasoconstrictor angiotensin II.

Hypertension

A chronic medical condition characterized by persistently elevated blood pressure in the arteries, leading to increased risk of heart disease, stroke, and other health issues.

Dizziness

A sensation of spinning or lightheadedness, which may result in a loss of balance.

Cardiopulmonary Resuscitation

An emergency procedure consisting of external chest compressions and artificial ventilation to manually preserve intact brain function until further measures to restore spontaneous blood circulation and breathing in a person who is in cardiac arrest.