A research psychologist manipulates the caffeine intake (2 mg,5 mg,10 mg)in human participants in the laboratory and then examines the effect of the different levels of caffeine on the participants' mood.In this study,the mood scores are the __________ variable.

Question

Quizplus · Accepted Answer

The mood scores are the variable being measured, meaning they are the outcome or response variable that is dependent on the level of caffeine intake manipulated by the researcher. Therefore, it is the dependent variable in this experiment. The independent variable is the level of caffeine intake (2 mg, 5 mg, 10 mg). Correlational variables are two variables that are measured and analyzed to determine if they are related, which does not apply in this experiment. Experimental variables refer to the variables that are being manipulated in the experiment, in this case, the level of caffeine intake, but it doesn't refer to the mood scores.

A Research Psychologist Manipulates the Caffeine Intake (2 Mg,5 Mg,10