Resources

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Tutorial

WWC Online Regression Discontinuity Design Standards Training

December 27, 2021

This training is designed to inform the public about key elements of the WWC regression discontinuity design standards and the procedures the WWC uses to review regression discontinuity desig...

Webinar

What Works Clearinghouse Systematic Literature Searches

September 29, 2021

View the recording of the What Works Clearinghouse (WWC) and Education Resources Information Center (ERIC) webinar on the best-practice principles and procedures used in WW...

Tutorial

WWC Single-Case Design Standards Online Training

The What Works Clearinghouse (WWC) offers this training to inform the public about the key elements of the WWC single-case design standards and the procedures the WWC uses to review single-case design...

Resources for WWC Reviewers

Guide

Using Bayesian Meta-Analysis to Explore the Components of Early Literacy Interventions
September 12, 2023

This What Works Clearinghouse methodological report explores to what extent components of early literacy interventions can explain which interventions have positive effects on alphabetics skills.

Reference

Acceptable Methods for Addressing Missing Data
April 27, 2023

This reference describes the acceptable approaches for addressing missing data in group designs under the What Works Clearinghouse (WWC) Handbook, Version 5.0.

Webinar

Single-Case Design Research in What Works Clearinghouse (WWC) Intervention Reports
April 1, 2023

The What Works Clearinghouse (WWC) has released a webinar to help researchers understand how the WWC reviews and synthesizes single-case design research in the context of two WWC intervention reports on Good Behavior Game and Class-Wide Function-Related Intervention Teams (CW-FIT).

Webinar Slides

Webinar

Introducing the WWC Procedures and Standards Handbook, Version 5.0
August 25, 2022

The WWC hosted a webinar, on August 25, 2022, to introduce the major updates included in the WWC Procedures and Standards Handbook, Version 5.0. Due to a recording error, this webinar was re-re...

Questions and answers about the WWC Procedures and Standards Handbook, Version 5.0

Video

Accurately Capturing Study Context: Improvements to the OSRG for 2022
August 1, 2022

This video provides WWC reviewers with an overview of updates to the Online Study Review Guide’s context fields.

Webinar

Introducing for public comment: WWC Procedures and Standards Handbook, Version 5.0
March 22, 2022

The WWC hosted a webinar on March 22, 2022 to introduce the major updates proposed for the WWC Procedures and Standards Handbook, Version 5.0 during the Handbook public comment period.

Webinar Slides

Tutorial

WWC Online Regression Discontinuity Design Standards Training
December 27, 2021

This training is designed to inform the public about key elements of the WWC regression discontinuity design standards and the procedures the WWC uses to review regression discontinuity desig...

Webinar

What Works Clearinghouse Systematic Literature Searches
September 29, 2021

View the recording of the What Works Clearinghouse (WWC) and Education Resources Information Center (ERIC) webinar on the best-practice principles and procedures used in WW...

Webinar

Reviewing Studies for the What Works Clearinghouse
August 23, 2021

This What Works Clearinghouse (WWC) webinar discussed processes for screening, reviewing, and reconciling WWC studies using the Online Study Review Guide (OSRG). During the webinar, the prese...

Webinar Agenda

Webinar Slides

Webinar Q&A

Webinar Summary

Webinar

Updates to the Version 4.1 Online Study Review Guide
July 29, 2021

This What Works Clearinghouse (WWC) webinar provided an overview of recent Online Study Review Guide (OSRG) updates that align with version 4.1 of the WWC Standards Handbook and WWC Procedure...

Webinar Agenda

Webinar Slides

Webinar Q&A

Webinar Summary

Webinar

Version 4.1 Effect Size and Standard Error Formulas
December 2, 2020

The WWC hosted a webinar on December 2, 2020 to summarize changes to the effect size and standard error formulas published in the V4.1 supplement to the WWC Procedures Handbook.

Webinar Slides

Webinar Q&A

Infographic

Data Extraction and Effect Size Estimation for Single-Case Design Studies
November 1, 2020

This infographic highlights the WWC’s process for extracting data and estimating effect size for reviews and reconciliations of single-case design studies

Infographic

Group Design Standards Training: Tips for Becoming a Certified Reviewer
October 1, 2020

This infographic provides tips for becoming a certified reviewer as well as additional information about the certification process.

Infographic

Reviewing the Available Research on Distance Learning
June 22, 2020

This infographic highlights what the WWC has discovered through rapid screening and reviews about the research behind distance learning programs and practices.

Webinar

WWC Review Protocols: What's the Point?
May 14, 2020

This webinar provides an introduction to review protocols particularly for WWC-certified reviewers, protocol authors, review team leadership, and researchers whose studies may be reviewed by the WWC.

Webinar Slides

Webinar Q&A

Webinar

WWC Standards for Reviewing Fuzzy Regression Discontinuity Designs
October 29, 2019

The WWC hosted a webinar on October 29, 2019 to provide WWC reviewers and other participants with guidance on WWC standards for reviewing evidence from fuzzy regression discontinuity designs (FRDDs).

Webinar Agenda

Webinar Slides

Webinar Q&A

Webinar

Documenting Study Context in WWC Reviews of Group Design Studies
May 14, 2019

On May 14, 2019, the What Works Clearinghouse (WWC) hosted a free webinar on documenting contextual information in reviews of group design studies. The slide deck and archived Q&A responses are also a...

Webinar Agenda

Webinar Slides

Webinar Q&A

Webinar

Confounding in Group Design Studies
April 18, 2019

The WWC hosted a webinar on April 18, 2019 on the WWC definition of confounds, why they are problematic, practice identifying them, and an examination of the prevalence of confounding in WWC-reviewed ...

Webinar Slides

Webinar Q&A

Reference

Key Criteria Used in WWC Reviews of Single-Case Design Research
January 1, 2017

The What Works Clearinghouse (WWC) Procedures and Standards Handbook (version 3.0) provides reviewers with a detailed description of the pilot single-case design standards and procedures. The WWC work...

Webinar

Applying the What Works Clearinghouse Standards to Postsecondary Research
March 10, 2016

This What Works Clearinghouse (WWC) webinar covers how the current WWC Procedures and Standards Handbook can be applied to postsecondary research. The presenters Will Doyle from Vanderbilt University,...

Reference

Attrition

Attrition (loss of sample) occurs when individuals initially included in a study are not included in the final study analysis. Attrition is a common issue in education research and can occur for many ...

Reference

Baseline Equivalence

As part of the WWC review process for certain types of studies, reviewers assess whether the intervention group (those that received the intervention of interest) and the comparison group (those that ...

Reference

Confounding Factors

A confounding factor is an aspect of a study that makes it impossible to tell whether the intervention or that factor is responsible for differences in outcomes. In WWC study reviews, certified review...

Tutorial

WWC Single-Case Design Standards Online Training

The What Works Clearinghouse (WWC) offers this training to inform the public about the key elements of the WWC single-case design standards and the procedures the WWC uses to review single-case design...

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