Fig. 1From: Evaluating the effects of analytical decisions in large-scale assessments: analyzing PISA mathematics 2003-2012PISA mathematics item linking across four rounds; \(I=158\); Common mathematics items linking single rounds: \(I=48\) (2003-2006); \(I=35\) (2006-2009); \(I=34\) (2009-2012); \(I=35\) (2003-2012)Back to article page