A researcher is investigating the effects of caffeine consumption on student writing performance. Because the researcher will evaluate both the speed of assignment completion and the number of grammatical errors, she will need to include more than one _____ variable in her study.

Question

A researcher is investigating the effects of caffeine consumption on student writing performance.  Because the researcher will evaluate both the speed of assignment completion and the number of grammatical errors, she will need to include more than one _____ variable in her study.

Quizplus · Accepted Answer

The correct answer is dependent variable because the researcher is measuring the effects of caffeine consumption on two outcomes: the speed of assignment completion and the number of grammatical errors. Both of these outcomes are dependent on the independent variable, which is caffeine consumption.

A Researcher Is Investigating the Effects of Caffeine Consumption on Student