Multiple Choice
In which type(s) of study do researchers have to be concerned about selective attrition (the problem that some participants drop out before the study is complete) ?
A) Longitudinal study
B) Cross-sectional study
C) Both longitudinal and cross-sectional studies, but mainly cross-sectional
D) Neither cross-sectional nor longitudinal studies
Correct Answer:
Verified
Correct Answer:
Verified
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