If you use a control group, to which of the following threats to internal validity are you still most vulnerable?
A) your own expectations affecting the results
B) subjects changing over time
C) outside conditions changing over time
D) attrition rates
Correct Answer:
Verified
Q23: Under what circumstances do you need to
Q24: The program you are evaluating is time-consuming,
Q25: Even if you randomly assign subjects to
Q26: You are evaluating the efficacy of a
Q27: Internal validity means _.
A) that maturation has
Q29: Why would you choose to do experimental
Q30: Why can causality be tested in experimental
Q31: What is quality control? List three ways
Q32: Write a research question for experimental evaluation
Q33: Write four hypotheses for your research question.
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