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Author Question: Because a meta-analysis by definition combines the results of different studies, what problem is it ... (Read 113 times)

james

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on: Jul 24, 2018
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 2

Under what conditions (if ever) should data from all the studies in a meta-analysis be combined into one single hypothesis test or confidence interval?


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patma1981

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Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

THIS SHOULD NEVER BE DONE, UNLESS IT IS CLEAR THAT THE SAME POPULATIONS WERE SAMPLED AND SIMILAR METHODS WERE USED FOR ALL STUDIES INCLUDED IN THE META-ANALYSIS.

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james

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Reply 2 on: Jul 24, 2018
Excellent

xthemafja

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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