This topic contains a solution. Click here to go to the answer
« previous next »

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
on: Jun 22, 2018
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
Reply #1 on: Jun 22, 2018
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!

« previous next »
 

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.

Effects of PYY on Activity of the Hypothalamus and OFC Effects of PYY on Activity of the Hypothalamus and OFC
Antidepressant Effects at the Synapse Antidepressant Effects at the Synapse
Radiation Side Effects, Healing Time, and Intervention Radiation Side Effects, Healing Time, and Intervention
Heavy fuel droplets separate as they flow around an abrupt bend in an intake manifold. Heavy fuel droplets separate as they flow around an abrupt bend in an intake manifold.
Summary of Parkinson’s disease effects. Summary of Parkinson’s disease effects.
The transfer experiment that demonstrated the existence of RNA primers in DNA replication The transfer experiment that demonstrated the existence of RNA primers in DNA replication
Video: Humerus Adduction Animation

For a complete list of videos, visit our video library