Because a meta-analysis by definition combines the results of different studies, what problem is it particularly prone to?
A)Simpson's Paradox.
B)Collapsing results over an important third variable.
C)Weakening or even reversing a relationship once groups of data are combined.
D)All of the above.

Question

Quizplus · Accepted Answer

Because a meta-analysis combines the results of multiple studies, it is susceptible to Simpson's Paradox, collapsing results over an important third variable, and weakening or even reversing a relationship once groups of data are combined. Therefore, all of these choices are correct.

Because a Meta-Analysis by Definition Combines the Results of Different