The Biggest Problem with Using Random Assignment and Controlling Extraneous

question 139

Multiple Choice

The biggest problem with using random assignment and controlling extraneous variables in an experiment is that __________.

• A) the experimental situation can become quite artificial
• B) participants often become angry at the deception involved
• C) it is difficult to ensure internal validity
• D) debriefing becomes very cumbersome

---

Definitions:

Parathyroid Hormone

A hormone produced by the parathyroid glands that helps regulate calcium levels in the blood.

Serum

Fluid portion of blood after the removal of fibrin and blood cells.

Muscle Contraction

The shortening and/or development of tension within a muscle, allowing for movement and force generation.

Blood Clotting

The process by which blood changes from a liquid to a gel, forming a clot to stop bleeding.