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Author Question: A student who is participating in a long term research project decides to stop participating and ... (Read 90 times)

abarnes

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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.


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kristenb95

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Reply #1 on: Jun 19, 2018
Answer to Question 1

d

Answer to Question 2

d


abarnes

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Reply #2 on: Jun 19, 2018
Thank you


kristenb95

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Reply #3 on: Jun 19, 2018
No problem :)


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