Psychological constructs

C​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​hoose a construct (sexual jealousy, self-confidence, etc.) and find two measures of that construct in the research literature. If you were conducting your own study, which one (if either) would you use and​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​ why?