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Question: How do you rate the usefulness of the following strategies for understanding and memorising the text? - I underline important parts of the text.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
10 countries/ areas
Highlight:
1 Republic of Korea4.56
2 Japan4.46
3 Italy4.35
3 United Kingdom4.35
5 Germany4.23
6 France 4.10
7 United States4.01
8 Australia3.95
9 Canada3.74
10 Sweden3.68

Note
The data of Azerbaijan are collected only in Baku. The data of China are collected only in Beijing, Shanghai, Jiangsu, and Zhejiang.

Source
OECD PISA 2018 Compendia

Correlations with major national performance indices
Life satisfaction (10 steps)
No. of data10
Regression equation
Y = -1.227787 X +11.741
Correlation coefficient (r)-0.887
Coefficient of determination (R2)0.787

GDP per capita (current US$)
No. of data10
Regression equation
Y = -34598.804308 X +192273.446
Correlation coefficient (r)-0.716
Coefficient of determination (R2)0.513

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = 1.103331 X +77.429
Correlation coefficient (r)0.143
Coefficient of determination (R2)0.020

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = -0.634128 X +4.106
Correlation coefficient (r)-0.638
Coefficient of determination (R2)0.407

Suicide, age-standardized (per 100 000 population)
No. of data10
Regression equation
Y = 1.664233 X +4.205
Correlation coefficient (r)0.108
Coefficient of determination (R2)0.012