In an experimental study,men with erectile disorder received either Viagra or a placebo.In this study,the drug dose (none versus peak dose)was the
A) confounding variable.
B) dependent variable.
C) random sample.
D) independent variable.

Question

Quizplus · Accepted Answer

In this study, the researchers manipulated the drug the participants received (Viagra or placebo) in order to observe its effects on their erectile function. Therefore, the drug dose is the independent variable, as it is being manipulated by the researchers. The dependent variable in this study would be the participants' erectile function or response to the drug/placebo. Confounding variables are variables that can affect the relationship between the independent and dependent variables, but in this case, there is no mention of any potential confounding variables. A random sample may have been used to select participants for the study, but this is not directly related to the variables being measured/manipulated.

In an Experimental Study,men with Erectile Disorder Received Either Viagra