Which type of studies does IEA primarily conduct?

The International Association for the Evaluation of Educational Achievement (IEA) primarily focuses on cross-national studies of educational achievement. This approach allows the organization to gather comprehensive data on student performance across different countries, facilitating comparisons of educational outcomes and policies on an international scale.

Through these studies, IEA collects standardized assessments that measure the academic skills and knowledge of students from diverse educational systems, enabling researchers and policymakers to analyze trends, gaps, and effective practices globally. These insights can inform educational reforms and strategies to enhance learning environments in various contexts.

This emphasis on cross-national comparisons distinguishes IEA's mission and contributions to the field of educational research, providing valuable benchmarks and frameworks for understanding how different nations approach education. The other options, while valuable in their respective contexts, do not represent the primary focus and scope of IEA's work.