Why should researchers be interested in unpublished data when conducting a meta-analysis?
a. Unpublished data usually contains larger effect sizes that can skew the overall standardized effect size in a meta-analysis.
b. Unpublished data can give insights into new research directions that are in the preliminary stages.
c. Unpublished data can help researchers estimate the frequency of non-significant findings and correct for this in their analysis.
d. Unpublished data usually involves smaller sample sizes and gives researchers a snapshot of what the data looks like in a smaller sample.
Answer: c. Unpublished data can help researchers estimate the frequency of non-significant findings and correct for this in their analysis.
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