Endogenous change occurs when ______.
A) the groups can differ over time because of differential attrition
B) natural developments in the subjects, independent of the experimental treatment, account for some or all of the observed change
C) subjects who are chosen for a study because of their extreme scores on the dependent variable become less extreme on the posttest due
D) something other than the treatment influences outcome scores
Correct Answer:
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Q19: The concrete individual sequence of events, thoughts
Q20: A technique used in nonexperimental research to
Q21: In an experiment, the group of subjects
Q22: Association is not a sufficient criterion on
Q23: Sample generalizability exists when _.
A) data for
Q25: Random assignment (randomization) helps ensure that the
Q26: In a _ design, a comparison group
Q27: The simplest type of before-and-after design is
Q28: The common feature of before-and-after designs is
Q29: When a true experimental design is not
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