A researcher is interested in studying how alcohol consumption influences memory. She goes into a local bar and asks bar patrons who have had at least two alcoholic drinks in the past hour to complete a memory test. She then compares their memory scores to a control group, who came into her laboratory at the university to complete the memory test (while sober).

1. How many levels are there for the independent variable?   a) none b)1 c)2 d) 3

2. What is the confound?

3. How could the confound be fixed?

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