Multiple Choice
When events that occur during the course of a study have a different effect on one group of participants than on another,the possible threat to internal validity is
A) differential regression.
B) selection.
C) history.
D) additive effects of selection and history.
Correct Answer:
Verified
Correct Answer:
Verified
Q8: Strong evidence of a treatment effect in
Q9: A psychologist tests the effect of an
Q10: A human services agency was interested in
Q11: A researcher trains observers to complete checklists
Q12: A physician wants to test the effectiveness
Q14: Perhaps the greatest difference between basic research
Q15: Distinguish between evaluation of outcome and evaluation
Q16: The most critical defining characteristic of a
Q17: Students on two college campuses serve as
Q18: Why is the nonequivalent control group design