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Students who had skipped a whole day of school prior to the PISA assessment ...

„On average across OECD countries, students who had skipped a whole day of school at least once in the two weeks prior to the PISA assessment score 45 points lower in the science assessment than students who had not skipped a day of school (33 points lower after accounting for the socio-economic profile of students and schools).“

OECD (Hrsg.), „PISA 2015 Results. Policies and Practices for Successful Schools“ (2016), S. 36