Скачать или смотреть What Works Clearinghouse Version 4.1 Effect Size and Standard Error Formulas

The WWC hosted a webinar on December 2, 2020 to present new effect size and standard error formulas introduced in supplement to the WWC Procedures Handbook, Version 4.1. The presenters described the new formulas for both individual-level and cluster-level assignment studies, demonstrated how the formulas should be used, and explained how the formulas are incorporated in the Online Study Review Guide.



The webinar was intended for a technical audience of WWC reviewers who would conduct reviews using the new formulas, and for researchers who conduct quantitative meta-analyses in education and related social and behavioral sciences. Ryan Williams, Ph.D., Principal Researcher at AIR and David Miller, Ph.D., Researcher at AIR led the webinar. Natalya Gnedko-Berry, Ph.D., Senior Researcher at AIR served as the moderator