Multiple Choice
The instrumentation threat is most frequently due to changes in
A) participants
B) the recording equipment
C) human raters
D) temperature and humidity
Correct Answer:

Verified
Correct Answer:
Verified
Related Questions
Q8: Suppose that an investigator tested the treatment
Q9: The best way to rule out selection
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
Q14: To establish internal validity, you have to
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