A dataset containing sample size and number of effect sizes seen in primary studies evaluated by the What Works Clearinghouse.
Format
A tibble with 615 rows and 2 variables:
- n
the sample size of the primary study
- n_ES
number of effect sizes in the primary study
References
What Works Clearinghouse (2021). “Data from individual studies.” https://ies.ed.gov/ncee/wwc/studyfindings. (visited on ).