Multiple Choice
To establish internal validity, you have to show that
A) changes in the first variable are followed by changes in the second variable
B) the changes in the second variable couldn't be caused by any variable other than the first variable
C) the measures used are valid
D) both a and b
Correct Answer:
Verified
Correct Answer:
Verified
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Q10: Studying participants in a highly controlled lab
Q11: The fact that taking a pretest may
Q12: In a two-group study, in which participants
Q13: The instrumentation threat is most frequently due
Q15: In a longitudinal study that compares the
Q16: Which of the following is a threat
Q17: Distinguish between maturation and history.
Q18: Campbell and Stanley (1966) identified _ threats
Q19: Matching on pretest scores makes a study