
Which statement accurately describes what is evaluated by differential research?
A) differences between treatment conditions using the same group of participants in all treatments
B) differences between treatment conditions using a separate group of participants for each treatment
C) differences in scores before versus after a treatment
D) differences in scores between preexisting groups of participants
Correct Answer:
Verified
Q2: In nonexperimental and quasi-experimental studies, different groups
Q11: Last fall,a state college introduced a one-week
Q12: A researcher introduces a new mathematics program
Q13: Which study illustrates a nonexperimental study?
A)a study
Q15: A researcher compares preexisting groups of individuals
Q15: The concept of nonequivalent groups means _.
A)
Q17: A problem with nonequivalent group designs is
Q19: Pre-post designs are threatened by _.
A)factors related
Q20: Which threat occurs in nonequivalent group designs
Q37: A research study that evaluates changes in
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