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Table 10 Grand mean effect sizes (ES) for all countries together as well as classified based on their GGGR Index of gender parity

From: Gender, affect, and math: a cross-national meta-analysis of Trends in International Mathematics and Science Study 2015 outcomes

 KMean ESτ2
Liking math
 Fourth graders
  All countries48− 0.0730.024
  Countries with the lowest gap (GGGI)10− 0.1270.018
  Countries with the highest gap (GGGI)100.0710.022
 Eighth graders
  All countries40− 0.1060.014
  Countries with the lowest gap (GGGI)10− 0.1410.005
  Countries with the highest gap (GGGI)10− 0.1280.012
Confidence in math
 Fourth graders
  All countries48− 0.1330.033
  Countries with the lowest gap (GGGI)10− 0.1990.017
  Countries with the highest gap (GGGI)10− 0.0780.032
 Eighth graders
  All countries40− 0.1410.01
  Countries with the lowest gap (GGGI)10− 0.2480.008
  Countries with the highest gap (GGGI)10− 0.0520.003
Valuing math
 Eighth grader
  All countries40− 0.0660.02
  Countries with the lowest gap (GGGI)10− 0.1140.01
  Countries with the highest gap (GGGI)10− 0.0360.008