What does it mean when a study finds no effects?

This short brief for education decisionmakers discusses three main factors that may contribute to a finding of no effects: failure of theory, failure of implementation, and failure of research design. It provides readers with questions to ask themselves to better understand 'no effects' findings, and describes other contextual factors to consider when deciding what to do next.

View, download, and print the Executive Summary as a PDF file (254 KB)