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Table 6 Item point-biserial correlations, averaged across countries and across items

From: The TIMSS 2019 Item Equivalence Study: examining mode effects for computer-based assessment and implications for measuring trends

Grade/subject Average point-biserial correlation across countries and items
paperTIMSS eTIMSS Difference
Fourth grade
 Mathematics 0.42 (0.12) 0.41 (0.12) 0.01 (0.09)
 Science 0.37 (0.10) 0.36 (0.11) 0.00 (0.09)
Eighth grade
 Mathematics 0.42 (0.13) 0.41 (0.14) 0.02 (0.03)
 Science 0.37 (0.12) 0.37 (0.12) 0.01 (0.09)
  1. ( ) Standard deviations appear in parentheses. Standard deviations of item point-biserial correlations were computed across items in each country and then pooled across countries. Because of rounding some results may appear inconsistent