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Table 5 Overall effect size of gender differences in “Confidence in Mathematics” for fourth and eighth graders

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

 KESSEτ2Test of Null95% CITest of homogeneity
ZPLowerUpperQdf(Q)P
4th grade
 Fixed48− 0.01360.004 − 33.50.000− 0.14− 0.122514.04470.000
 Random48− 0.01330.0280.03− 4.70.000− 0.19− 0.08   
 KESSEVZPLowerUpperQdf(Q)P
8th grade
 Fixed40− 0.1430.004 − 36.00.000− 0.15− 0.131076.27390.000
 Random40− 0.1410.0200.01− 7.420.000− 0.19− 0.11