In this article we discuss how apparently indicators that may appear straightforward, such as gender differences, need to be interpreted with extreme care. In particular, we consider how the assessment framework, and the methodology of international surveys, may have a potential impact on the results and on the indicators. Through analysis of…

This exploratory study was built on research spanning three decades. Petersen, Marco, and Stewart (1982) conducted a major empirical investigation of the efficacy of different equating methods. The studies reported in Dorans (1990) examined how different equating methods performed across samples selected in different ways. Recent population…

This study explored the differential performances of mathematics test items used to test secondary school girls and boys in the national examination. The main purpose was to find out whether type of items is the reason for girls' overachievement in the Malaysian mathematics national examination. To investigate seven types of items, Differential…