______ occurs when groups become different after an experiment begins and the number of participants who drop out of each group is uneven.
A) Differential attrition
B) Causal variation
C) Contamination
D) The Hawthorne effect
Correct Answer:
Verified
Q10: A randomized experimental design with a pretest
Q11: _ is what makes the comparison group
Q12: The technique of _ allows researchers to
Q13: A _ is given to a control
Q14: _ occurs when participants can select the
Q16: The effect that can occur when external
Q17: A quasi-experimental design consisting of several pretest
Q18: Despite their obvious strengths, _ are rarely
Q19: Correlation proves causation.
Q20: Identifying causes and figuring out why things
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