In order to attribute causality of a posttest measure in an experimental study,the independent variable will be:
A) administered to control group subjects only.
B) administered to subjects selected by the researcher.
C) administered to treatment group subjects.
D) defined loosely to avoid bias.

Question

Quizplus · Accepted Answer

In an experimental study, the independent variable is manipulated and administered to the treatment group subjects. This allows for comparison between the treatment group and the control group, which receives either a placebo or no treatment at all. By manipulating the independent variable and observing the effects on the posttest measure, causality can be attributed to the treatment. Choices A and B are not comprehensive enough as they do not specify which subjects will receive the independent variable, while choice D suggests an unsystematic approach to defining the independent variable, which can result in bias.

In Order to Attribute Causality of a Posttest Measure in an Experimental