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paw2323 paw2323
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6 years ago
In a nonequivalent-control-group design, the most serious threat to internal validity is:
 
  A) Testing
  B) Selection
  C) Maturation
  D) History
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jjdjd j.jjdjd j.
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6 years ago
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paw2323 Author
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6 years ago
Helped a lot
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Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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2 hours ago
Brilliant
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