An exploration of cluster structure in scientific literacy in PISA: Evidence for a Nordic dimension?
The cognitive items covering the domain of scientific literacy in the Programme for International Student Assessment (PISA) are explored through an analysis of the item residuals (item-by-country interactions) with the aim of looking for a distinct Nordic pattern. The findings of a cluster analysis indicate that the profile across the Nordic countries is not very distinct. However, stable profiles are established for a number of other groups of countries, and the Nordic countries are shown to be membersof a larger group of countries which is labelled North-West European countries. Furthermore, item characteristics are used to find possible explanations for the profiles.
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