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Author Question: There are 3 major threats to the validity of pre-experimental designs. They are _____. a. ... (Read 34 times)

roselinechinyere27m

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on: Jun 19, 2018
There are 3 major threats to the validity of pre-experimental designs. They are _____.
 
  a. history, maturation, and testing
  b. selection, history, and generalization
  c. generalization, selection, and mortality
  d. selection, mortality and the selection by mortality interaction

Question 2

Naturalistic observation is rarely used by scientists because it does not make use of the scientific method.
 
  Indicate whether the statement is true or false


ttt030911

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

D
Selection, mortality, and the interaction between them present challenges to the validity of pre-experimental designs.

Answer to Question 2

F


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roselinechinyere27m

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Reply #2 on: Jun 19, 2018
Thank you


ttt030911

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


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