This topic contains a solution. Click here to go to the answer

Author Question: An experiment is being conducted to determine the effects of caffeine intake on student performance. ... (Read 203 times)

bobbysung

  • Hero Member
  • *****
  • Posts: 519
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



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

aadams68

  • Sr. Member
  • ****
  • Posts: 317
Answer to Question 1

A

Answer to Question 2

A




bobbysung

  • Member
  • Posts: 519
Reply 2 on: Jun 22, 2018
Great answer, keep it coming :)


ghepp

  • Member
  • Posts: 361
Reply 3 on: Yesterday
Gracias!

 

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

The types of cancer that alpha interferons are used to treat include hairy cell leukemia, melanoma, follicular non-Hodgkin's lymphoma, and AIDS-related Kaposi's sarcoma.

For a complete list of videos, visit our video library