As part of its flagship educational study--the Programme for International Student Assessment (PISA)--the Organisation for Economic Co-operation and Development (OECD) has undertaken extensive work to create an internationally relevant composite indicator aimed at measuring socioeconomic background. However, the degree to which a single measure of…

In international achievement studies, questionnaires typically ask about the presence of particular household assets in students' homes. Responses to the assets questions are used to compute a total score, which is intended to represent household wealth in models of test performance. This study uses item analysis and confirmatory factor analysis…