In an experiment to test the effects of alcohol on memory,the experimenter gives vodka mixed in orange juice to one group of participants and orange juice with no vodka to the other group.She then measures the memory skills of both groups by means of a memory test.In this study,the independent variable would be:
A)scores on the memory test.
B)the presence or absence of vodka in the orange juice.
C)intelligence.
D)a placebo.

Question

Quizplus · Accepted Answer

The independent variable is the variable that is being manipulated by the experimenter and in this case, it is the presence or absence of vodka in the orange juice that is being manipulated. The memory test scores are the dependent variable because they are the outcome being measured and are expected to change as a result of the manipulation of the independent variable. Intelligence and a placebo are not relevant to this particular study.

In an Experiment to Test the Effects of Alcohol on Memory,the