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

Large-scale Assessments in Education

An IERI – International Educational Research Institute Journal

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

Grade/subject	Average point-biserial correlation across countries and items
Grade/subject	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)

( ) 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