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Table 9 Average paperTIMSS-eTIMSS difference scores by student subgroups—eighth grade

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

Subgroup Valid cases Average percent of students Average difference score
Mathematics Science
Books in the home
 0–10 books 1241 14 (0.5) 14 (1.7) 9 (1.7)
 11–25 books 2160 25 (0.6) 12 (1.4) 7 (1.3)
 26–100 books 2670 30 (0.5) 13 (1.1) 6 (1.2)
 101–200 books 1450 16 (0.5) 15 (1.3) 4 (1.3)
 More than 200 books 1454 16 (0.6) 16 (1.7) 9 (1.7)
Gender
 Girls 4794 53 (1.4) 14 (1.0) 9 (0.9)
 Boys 4308 48 (1.4) 13 (1.5) 6 (1.6)
Digital self-efficacy
 Low 379 4 (0.3) 15 (3.1) 8 (3.3)
 Medium 2302 26 (0.5) 15 (1.4) 8 (1.3)
 High 6286 70 (0.6) 13 (1.1) 6 (1.0)
  1. () Standard errors appear in parentheses. Because of rounding some results may appear inconsistent