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

Large-scale Assessments in Education

An IERI – International Educational Research Institute Journal

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

	K	Mean ES	τ²
Liking math
Fourth graders
All countries	48	− 0.073	0.024
Countries with the lowest gap (GGGI)	10	− 0.127	0.018
Countries with the highest gap (GGGI)	10	0.071	0.022
Eighth graders
All countries	40	− 0.106	0.014
Countries with the lowest gap (GGGI)	10	− 0.141	0.005
Countries with the highest gap (GGGI)	10	− 0.128	0.012
Confidence in math
Fourth graders
All countries	48	− 0.133	0.033
Countries with the lowest gap (GGGI)	10	− 0.199	0.017
Countries with the highest gap (GGGI)	10	− 0.078	0.032
Eighth graders
All countries	40	− 0.141	0.01
Countries with the lowest gap (GGGI)	10	− 0.248	0.008
Countries with the highest gap (GGGI)	10	− 0.052	0.003
Valuing math
Eighth grader
All countries	40	− 0.066	0.02
Countries with the lowest gap (GGGI)	10	− 0.114	0.01
Countries with the highest gap (GGGI)	10	− 0.036	0.008