This article deals with 15-year-old students' tendencies to consider a future science-related career. Two aspects have been the focus of our investigation. The first is based on the construct called "future science orientation", an affective construct consisting of four Likert scale items that measure students' consideration of being…

In response to Barry McGaw's article "The role of the OECD in international comparative studies of achievement", this contribution explores two issues which the author considers closely interrelated. The first issue concerns the quality of the items produced to assess reading skills in the OECD-PISA and OECD-SIALS studies and the…

One of the most salient requirements for international educational research is the use of comparable measures. For the comparison of student performance across countries the use of item response theory (IRT) scaling techniques facilitates the collection of cross-nationally comparable measures. But there is also a need for valid and comparable…