Hey guys I was wondering if you could answer this for me ASAP pls!! Effects of Caffeine Consumption on the Short-Term Memory of College Students You wish to test the effects of energy drinks on short -term memory in college students. You recruit 100 volunteers for your study. The volunteers are all college freshmen, 50 women and 50 men. The volunteers are divided into five equal-sized groups containing the same number of men and women. Group 1 will receive a placebo. Group 2 will receive the same volume of a drink containing 50 mg of caffeine. Group 3 will receive the same volume of a drink containing 100 mg of caffeine. Group 4 will receive the same volume of a drink containing 150 mg of caffeine. Group 5 will receive the same volume of a drink containing 200 mg of caffeine You will administer a test of short-term memory 30 minutes after participants consume their drinks.

1. What is the independent variable in this experiment?

2. What is the dependent variable in this experiment

3. How is the independent variable different between the experimental and control groups? (Hint: What “treatment” did the experimental groups receive and what “treatment” did the control group receive?)

4. Should the control group know that it is receiving the placebo? Explain.