The researcher divides his lab rats into two groups and administers IV methamphetamine to one of the groups, in order to determine its effect on the fear-flight response. This is an example of which of the following?

Question

Quizplus · Accepted Answer

Manipulation is the correct answer because the researcher is actively changing a variable (administering IV methamphetamine) to observe its effect on another variable (the fear-flight response), which is a hallmark of experimental design.

The Researcher Divides His Lab Rats into Two Groups and Administers