Answer:
The variable controlled by the experimenter is the quantity of alcohol consumed, whereas the variable that is measured is the score from three darts.
Explanation:
In the realm of psychology, an independent variable refers to a factor that cannot be quantified by the researcher. This variable can only be adjusted or regulated by the experimenter.
On the other hand, a dependent variable is something that the researcher can assess during the study.
Here, since the researcher cannot dictate how much alcohol the participants consume, the amount of alcohol ingested is classified as the independent variable. Conversely, the score from the three darts, which is assessable by the experimenter, is classified as the dependent variable.
Thus, the conclusion is ---
The variable controlled by the experimenter is the quantity of alcohol consumed, whereas the variable that is measured is the score from three darts.