Answer:
Independent variable is the amount of alcohol drunk. Dependent variable is the 3 dart score.
Step-by-step explanation:
In psychology, an independent variable is a variable that can not be measured by the experimenter or the researcher. It can only be manipulated or can be controlled by the researcher.
Whereas a dependent variable is the variable which can be measured by the person dong the study.
Here, since the experimenter can not control the amount of alcohol taken by the participants, thus the the amount of alcohol drunk is the independent variable. While the 3 darts that can be measured by the experimenter is considered as the dependent variable.
Hence the answer is ---
Independent variable is the amount of alcohol drunk. Dependent variable is the 3 dart score.