The OECD Programme for International Student Assessment (PISA) surveys collected data on students’ performances in reading, mathematics and science, as well as contextual information on students’ background, home characteristics and school factors which could influence performance. This publication includes detailed information on how to analyse the PISA data, enabling researchers to both reproduce the initial results and to undertake further analyses. In addition to the inclusion of the necessary techniques, the manual also includes a detailed account of the PISA 2006 database and worked examples providing full syntax in SPSS®.
This chapter will discuss the computation of standard errors on differences. Following a description of the statistical issues for such estimates, the different steps for computing such standard errors will be presented. Finally, the correction of the critical value for multiple comparisons will be discussed.
