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Archived Resources

Webinar

Design Comparable Effect Sizes for Single-Case Design Studies

October 13, 2020

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).
Video

Finding Tier 1, Tier 2, and Tier 3 Evidence from the What Works Clearinghouse

April 3, 2020

This presentation is on finding Tier 1, Tier 2, and Tier 3 evidence from the What Works Clearinghouse
Webinar

What’s New in Version 4.1 of the WWC Standards Handbook and Procedures Handbook?

January 22, 2020

The WWC hosted a webinar on January 22, 2020 to discuss changes between the Version 4.0 and 4.1 WWC Standards Handbook and Procedures Handbook.
Webinar

Missing Data in Group Design Studies

April 11, 2019

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...
Webinar

Understanding the Updated WWC Procedures and Standards

November 16, 2017

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...
Guide

Reviewer Guidance for Use with the Procedures and Standards Handbooks V4.0

October 1, 2017

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...
Guide

Reviewer Guidance for Use with the Procedures and Standards Handbooks V3.1

December 1, 2016

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.
Guide

Reviewer Guidance for Use with the Procedures and Standards Handbooks V3.0

March 1, 2016

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.
Reference

Assessing Attrition Bias v3.0

September 1, 2014

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...
Reference

Assessing Attrition Bias v2.1

July 1, 2013

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...
Reference

What Works in Math Summary

A summary of the WWC recommendations on teaching math to young children provides suggestions for building on their interest in math.

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