You are evaluating the efficacy of a new safety training course at a shipping company. To ensure accurate results, it is vital that the control group does not have access to the information in the course; however, subjects from your control group and your treatment group frequently interact with one another and you are concerned that they may share this information. Which of the following are you most concerned with?
A) debriefing
B) contamination
C) placebo effect
D) attrition
Correct Answer:
Verified
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Q27: Internal validity means _.
A) that maturation has
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