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Author Question: The central threat to the internal validity of a simple interrupted time series design is a. ... (Read 85 times)

ghost!

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on: Jun 20, 2018
The central threat to the internal validity of a simple interrupted time series design is
 
  a. maturation
   b. contemporary history
  c. regression to the mean
  d. pretest sensitization
  e. selection bias

Question 2

A local history effect occurs
 
  a. because participants were not randomly assigned to groups
  b. when external validity is low
  c. as a result of regression to the mean
  d. all of the participants are from the same locality
   e. when groups experience different events other than the quasi-independent variable


xMRAZ

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Reply #1 on: Jun 20, 2018
Answer to Question 1

B

Answer to Question 2

E


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