In Experimental Studies Examining the Effectiveness of New Medications, Researchers

question 82

Multiple Choice

In experimental studies examining the effectiveness of new medications, researchers often administer a placebo (an inactive substance that should have no medical effect on the participant) . Giving a placebo to participants in the control condition increases:

• A) external validity.
• B) internal validity.
• C) independence.
• D) extraneous variables.

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Definitions:

Pleura

The thin, protective membranes surrounding the lungs and lining the inner chest wall, facilitating smooth movement of the lungs during breathing.

Pleurisy

An inflammation of the pleurae, which are the layers of tissue lining the lungs and inner chest wall, often causing sharp chest pain with breathing.

Pleural Cavity

The thin fluid-filled space between the two layers of the pleura surrounding the lungs, providing lubrication during respiratory movements.

Blood

A vital liquid flowing in the living organism's body that carries essential substances and removes waste.