The WWC hosted a webinar on October 13, 2020 to discuss the use, application and estimation of the design-comparable effect size (D-CES) for single-case design studies (SCDs).
On April 11, 2019, the What Works Clearinghouse (WWC) hosted a free webinar on the new guidelines for reviewing analyses with missing or imputed data under the WWC Standards Handbook, Version 4.0. The...
On November 16, 2017, the What Works Clearinghouse (WWC) delivered a presentation on the Version 4.0 Procedures and Standards Handbooks, which were released October 30, 2017. The approaches researcher...
The What Works Clearinghouse (WWC) Procedures and Standards Handbooks (version 4.0) provides reviewers with a detailed description of the procedures and standards used by the WWC in the review of stud...
The archived guidance document is provided here to inform WWC readers on the additional guidance provided to reviewers applying the previous version 3.1 procedures and standards.
The archived guidance document is provided here to inform WWC readers on the additional guidance provided to reviewers applying the previous version 3.0 procedures and standards.
Attrition occurs when members of the initial research sample are not part of the final analysis sample, such as due to missing data or leaving the study. Both the overall sample attrition and the diff...
Attrition occurs when members of the initial research sample are not part of the final analysis sample, such as due to missing data or leaving the study. Both the overall sample attrition and the diff...
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