This document discusses testing and refining criteria to assess media literacy levels in Europe. It outlines the objectives to develop a tool to measure media literacy across age groups and countries. The approach includes reviewing literature, validating measures statistically, testing the tools, and providing recommendations. It identifies challenges in connecting individual and country-level measures and in measuring critical media analysis. The process of validation involves mapping indicators to data, identifying gaps and redundancies, and proposing a more focused set of variables. Recommendations include additional measures of credibility evaluation and critical understanding.