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 204 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
Excellent


Alyson.hiatt@yahoo.com

  • Member
  • Posts: 354
Reply 3 on: Yesterday
Gracias!

 

Did you know?

Your heart beats over 36 million times a year.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

For a complete list of videos, visit our video library