Fig. 1From: The TIMSS 2019 Item Equivalence Study: examining mode effects for computer-based assessment and implications for measuring trendsItem plots of international average percent correct statistics for mathematics—paperTIMSS vs. eTIMSS. Each data point represents a mathematics trend item with x-axis the percent correct based on paperTIMSS data and y-axis percent correct based on eTIMSS data. Expected invariant items (left) were included in the analysis. Expected non-invariant items (right) were plotted as a means of comparisonBack to article page