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Question: How do you rate the usefulness of the following strategies for understanding and memorising the text? - I concentrate on the parts of the text that are easy to understand.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
10 countries/ areas
Highlight:
1 Republic of Korea3.67
2 Japan 3.57
3 United States3.42
4 Australia3.32
5 Canada3.24
6 United Kingdom3.13
7 France3.04
8 Sweden3.02
9 Germany2.97
10 Italy2.87

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 = -0.981886 X +9.932
Correlation coefficient (r)-0.546
Coefficient of determination (R2)0.298

GDP per capita (current US$)
No. of data10
Regression equation
Y = -1964.325295 X +56068.249
Correlation coefficient (r)-0.045
Coefficient of determination (R2)0.002

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = 1.361898 X +77.498
Correlation coefficient (r)0.184
Coefficient of determination (R2)0.034

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = -0.515726 X +3.125
Correlation coefficient (r)-0.497
Coefficient of determination (R2)0.247

Suicide - all ages (per 100,000 population)
No. of data10
Regression equation
Y = 16.666667 X -39.780
Correlation coefficient (r)0.745
Coefficient of determination (R2)0.555