Professor Jancy did a study in which she explored the relationship between caffeine consumption and the ability to memorize words on a list. The independent variable in her study was
A) the length of the word list to be remembered.
B) the number of words recalled.
C) the time between learning and attempting recall.
D) the amount of caffeine consumed.

Question

Quizplus · Accepted Answer

The independent variable is the variable that is manipulated by the researcher in order to test its effect on the dependent variable. In this study, the independent variable is the amount of caffeine consumed, as this is what is being manipulated. The dependent variable is the ability to memorize words on a list, which is being measured and observed by the researcher. Therefore, the best choice for the independent variable in this study is D) the amount of caffeine consumed.

Professor Jancy Did a Study in Which She Explored the Relationship