What is the "John Henry" effect?
A) improvement based on awareness of treatment
B) observer bias against a control group
C) improvement based on awareness of being in a control group
D) observer bias in favor of a treatment group
Correct Answer:
Verified
Q13: If a pretest causes a change in
Q14: Which of the following factors is primarily
Q15: A researcher administers a standardized test to
Q16: What is the name of the type
Q17: In a single-group design in which treatments
Q18: What is a major advantage of the
Q19: What is a major threat created by
Q20: What is a "confound" in an experimental
Q21: What is the placebo effect?
A) improvement based
Q23: Which of the following can be used
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