Experimental contamination occurs when
A) the experimenter informs participants of his or her hypotheses.
B) participants are not randomly assigned to conditions.
C) a variable unrelated to the study affects participants' responses.
D) participants in different conditions interact with one another.
Correct Answer:
Verified
Q12: In a simple interrupted time series design,
A)the
Q13: Which of the following confounds is most
Q14: A nonequivalent group's posttest-only design is also
Q15: Adding a nonequivalent control group to an
Q16: Unlike an independent variable, a quasi-independent variable
A)has
Q18: Contemporary history is a problem
A)in all experimental
Q19: Which of the following threats to internal
Q20: A researcher is studying the effects of
Q21: What are the primary threats to internal
Q22: What are longitudinal designs?
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