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Question: You have just read a long and rather difficult two-page text about fluctuations in the water level of a lake in Africa. You have to write a summary.How do you rate the usefulness of the following strategies for writing a summary of this two-page text? - I read through the text, underlining the most important sentences. Then I write them in my own words as a summary.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
10 countries/ areas
Highlight:
1 Republic of Korea4.61
2 Italy4.44
3 Japan4.40
4 Germany4.27
5 United Kingdom4.18
6 United States4.11
7 France 4.07
8 Australia4.01
9 Canada3.87
9 Sweden3.87

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 = -1.509323 X +12.968
Correlation coefficient (r)-0.901
Coefficient of determination (R2)0.812

GDP per capita (current US$)
No. of data10
Regression equation
Y = -40823.381657 X +219694.805
Correlation coefficient (r)-0.698
Coefficient of determination (R2)0.487

Life expectancy at birth - Both sexes (years)
No. of data10
Regression equation
Y = 1.588636 X +75.355
Correlation coefficient (r)0.170
Coefficient of determination (R2)0.029

Fertility rate, total (births per woman)
No. of data10
Regression equation
Y = -0.933018 X +5.382
Correlation coefficient (r)-0.775
Coefficient of determination (R2)0.601

Suicide, age-standardized (per 100 000 population)
No. of data10
Regression equation
Y = 4.202665 X -6.480
Correlation coefficient (r)0.225
Coefficient of determination (R2)0.051