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Author Question: Why would a researcher need to be concerned about the administration of a pretest and posttest in a ... (Read 13 times)

D2AR0N

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on: Jul 8, 2018
Why would a researcher need to be concerned about the administration of a pretest and posttest in a research study?
 
  a. It is a threat to external validity.
  b. It is a threat to internal validity.
  c. It is a form of selection bias.
  d. It is a form of maturation

Question 2

A study in which subjects receive more than one experimental treatment and then are followed over time is based on the ____________ design.
 
  Fill in the blank with correct word


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dellikani2015

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Reply #1 on: Jul 8, 2018
Answer to Question 1

b. It is a threat to internal validity.

Answer to Question 2

crossover


D2AR0N

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Reply 2 on: Jul 8, 2018
Gracias!

mjenn52

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Reply 3 on: Yesterday
Excellent

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