Study reviews underly all What Works Clearinghouse (WWC) products: reports on a single study, intervention reports, and practice guides. The WWC provides the capability for users to extract data resulting from WWC study reviews.

The WWC provides this extraction tool as part of our open data approach to increase transparency. The dynamically updated dataset provides:

• Greater transparency for WWC reviews, enabling users to replicate WWC findings and reports.
• More information to encourage research questions beyond those asked by the WWC.
• Detailed study findings to allow for meta-analysis.
• Contextual information for the examination of what works for whom and under what conditions.

The merged file is a flat file that contains data for all findings (f_), studies (s_), and intervention reports (i_) from studies that meet WWC standards. The file includes detailed information, including:

• WWC research ratings
• Topic areas
• Evidence tiers
• Effect sizes
• Sample sizes

Use the filters below to download a subset of the data by intervention, evidence tier, research rating, outcome domain, topic, protocol, or standards version.

The non-merged file contains three separate spreadsheets that include data from findings, studies, and intervention reports. The studies file includes studies that both meet and do not meet WWC standards.

The filters described above are for use with the merged file only.

If you are interested in a separate data extract that includes archived reviews, please visit the Archived Data From Individual Studies page. Note that archived reviews may contain information that has been updated in new reports.