An experiment is being conducted to determine the effects of ...

[bobbysung]

An experiment is being conducted to determine the effects of caffeine intake on student performance. One group is made to drink 5 cups of coffee, the other group drinks 1 cup of coffee. They then take the exam. The independent variable is ________.
 
  a. the amount of caffeine consumed.
  b. the group membership.
  c. how alert the students are during the exam.
  d. the students' performance on the exam.

Question 2

Studies where one group gets an experimental drug and another gets a placebo are called:
 
  a. randomized clinical trials c. quasi-experimental studies
  b. correlational studies d. longitudinal studies

[aadams68]

Answer to Question 1

A

Answer to Question 2

A

[bobbysung]

Thanks for the timely response, appreciate it

[triiciiaa]

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