Multiple Choice
Pre-experimental designs produce the greatest threat to internal and external validity because it provides
A) either no control group or no way to equate the groups used
B) a control group through randomization
C) an equivalent-groups design
D) none of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q8: A sample made up of volunteers may
Q9: In a study comparing scores on an
Q10: Whether the results of the study can
Q11: The time series design<br>A) requires periodic observations
Q12: A study in which the researcher interviews
Q14: In a true experiment<br>A) the control group
Q15: Which of the following is representative of
Q16: The influence of extraneous variables can be
Q17: The variable that the researcher measures to
Q18: One major disadvantage of a non-probability sample