ICH-GCP guidelines have provided international ethical, scientific, quality standards for designing, conducting, recording, and reporting of clinical trials, and are hugely popular in the region. Recent revisions to its guidance; ICH-GCP; E6 (R3) have brought significant changes in both structure and content from its predecessor, affecting every…

The paradigm of evidence-based education continues to inform the development of policy in a number of countries. At its simplest level, evidence-based education incorporates evidence, often that provided by randomised controlled trials, into classroom practice. England's Education Endowment Foundation is in the process of exporting evidence-based…

"Attrition" is the loss of sample during the course of a study. It occurs when individuals initially randomly assigned in a study are not included when researchers examine the outcome of interest. Attrition is a common issue in education research, and it occurs for many reasons. The What Works Clearinghouse (WWC) is an initiative of the…

Meeting the What Works Clearinghouse (WWC) attrition standard (or one of the attrition standards based on the WWC standard) is now an important consideration for researchers conducting studies that could potentially be reviewed by the WWC (or other evidence reviews). Understanding the basis of this standard is valuable for anyone seeking to meet…