An experimental study is conducted examining the relationship between drinking caffeine and reaction time.Participants given caffeine by the experimenters in different amounts,and then are assessed on various tests of reaction time.In this study,the amount of caffeine that a participant drinks is the ____.
A)random variable
B)independent variable
C)dependent variable
D)control variable

Question

Quizplus · Accepted Answer

The amount of caffeine that a participant drinks is being manipulated by the experimenters, meaning it is the independent variable in this study. The dependent variable would be the participants' reaction time, which is being measured and affected by the manipulation of the independent variable. The control variable would refer to any other factors that are being held constant in the study, but this is not mentioned in the given information. The term "random variable" does not fit the context of this study, as the amount of caffeine being given to participants is not a random event.

An Experimental Study Is Conducted Examining the Relationship Between Drinking