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Question: How do you rate the usefulness of the following strategies for understanding and memorising the text? - I quickly read through the text twice.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
10 countries/ areas
Highlight:
3 United Kingdom3.09
4 Canada3.04
4 United States3.04
6 Germany2.66
8 Japan2.54
9 France 2.50
10 Italy2.35

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 data7
Regression equation
Y = 0.688182 X +4.694
Correlation coefficient (r)0.722
Coefficient of determination (R2)0.521

GDP per capita (current US$)
No. of data7
Regression equation
Y = 33566.445786 X -41429.727
Correlation coefficient (r)0.663
Coefficient of determination (R2)0.440

Life expectancy at birth - Both sexes (years)
No. of data7
Regression equation
Y = -3.994781 X +92.483
Correlation coefficient (r)-0.579
Coefficient of determination (R2)0.335

Fertility rate, total (births per woman)
No. of data7
Regression equation
Y = 0.194366 X +0.941
Correlation coefficient (r)0.280
Coefficient of determination (R2)0.078

Suicide, age-standardized (per 100 000 population)
No. of data7
Regression equation
Y = 4.245024 X -2.196
Correlation coefficient (r)0.383
Coefficient of determination (R2)0.147