Author Question: In an experiment, a researcher manipulates people's mood to determine whether changes in mood cause ... (Read 111 times)

wenmo

  • Hero Member
  • *****
  • Posts: 540
In an experiment, a researcher manipulates people's mood to determine whether changes in mood cause changes in memory performance. However, the researcher is not sure that the manipulation is really causing people's mood to change. In this case, what should the researcher do?
 
  a. Control mood by holding it constant.
 b. Control mood by matching it across treatment conditions.
 c. Add a no-treatment control group in which mood is not manipulated.
  d. Add a manipulation check by measuring mood.

Question 2

Tonja wants to evaluate the effects of a new school breakfast program on student conduct and academic achievement. She cannot evaluate every student in every school in the district, so she randomly selects several schools and then collects data on all of the students in those schools. What type of sample is she using?
 
  a. simple random
 b. stratified random
 c. systematic random
  d. cluster random



jjorrostieta

  • Sr. Member
  • ****
  • Posts: 298
Answer to Question 1

d

Answer to Question 2

d



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

The longest a person has survived after a heart transplant is 24 years.

For a complete list of videos, visit our video library