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

Author Question: A student who is participating in a long term research project decides to stop participating and ... (Read 138 times)

abarnes

  • Hero Member
  • *****
  • Posts: 556
on: Jun 19, 2018
A student who is participating in a long term research project decides to stop participating and does not inform the experimenter of his decision. This is an example of which of the following threats to validity?
 
  a. Selection
  b. History
  c. Maturation
  d. Attrition

Question 2

Which of the following are threats to internal validity of the single-group before after design?
 
  a. Retesting threats
  b. Attrition threats
  c. Maturation threats
  d. All of the above are threats in this design.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kristenb95

  • Sr. Member
  • ****
  • Posts: 318
Reply #1 on: Jun 19, 2018
Answer to Question 1

d

Answer to Question 2

d


abarnes

  • Hero Member
  • *****
  • Posts: 556
Reply #2 on: Jun 19, 2018
Thank you


kristenb95

  • Sr. Member
  • ****
  • Posts: 318
Reply #3 on: Jun 19, 2018
No problem :)


« previous next »
 

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?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Greenstick Only one side of the shaft is broken, and the other is bent (like a greenstick); usually Greenstick Only one side of the shaft is broken, and the other is bent (like a greenstick); usually
Nursing student will understand it Nursing student will understand it
Object and Word Recognition After Vertices Have Been Eliminated (Adapted from Szwed, M., Cohen, L, Q Object and Word Recognition After Vertices Have Been Eliminated (Adapted from Szwed, M., Cohen, L, Q
Feng Mengbo, Long March: Restart. Feng Mengbo, Long March: Restart.
Christo, Over the River, Project for the Arkansas River, State of Colorado. Christo, Over the River, Project for the Arkansas River, State of Colorado.
Long-Range Forecasts Long-Range Forecasts
Video: Fertilization and Development

For a complete list of videos, visit our video library