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Table 2 Classification of PISA and TIMSS grade 8 items using the T/NT dichotomy, in percentages of items

From: The dependence on mathematical theory in TIMSS, PISA and TIMSS Advanced test items and its relation to student achievement

  PISA math 2012 (%) TIMSS grade 8 math 2011 (%)
Classified as T [using theorem(s)] by at least 5 of 6 scorers 11.8 19.3
Opinions divided (4-2 or 3-3) 2.4 7.4
Classified as NT [not using theorem(s)] by at least 5 of 6 scorers 85.9 73.3