DrVesner Is Examining How Exposure to Drug X Affects Levels

question 28

Multiple Choice

Dr.Vesner is examining how exposure to Drug X affects levels of aggression in rats.She gives each rat one of four doses of Drug X: no drug (saline injection) ,low dose,medium dose,and a high dose.After 20 minutes so the drug has time to take effect,she measures aggression by the intensity with which the rat bites a probing rod that is entered into the apparatus.In this study,what is the independent variable?

• A) levels of aggression
• B) dose of Drug X
• C) 20-minute delay
• D) intensity with which the rat bites a probing rod

---

Definitions:

Attraction

The act or capability of drawing interest or desire, often used in reference to magnetic, physical, or emotional appeal between individuals or objects.

Driving Miles

A measure of distance traveled by vehicles, often used to assess fuel consumption or travel costs.

Equality

The state of being equal, especially in status, rights, opportunities, or distribution of wealth.

Efficiency

In economic terms, this refers to the optimal production and allocation of resources to maximize output with the least waste.