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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 carefully check whether the most important facts in the text are represented in the summary.
Choices: 1 "Not useful at all" - 6 "Very useful"
Data: Average score
Period:
Area:
38 countries/ areas
Highlight:
1 Republic of Korea4.56
2 Portugal4.55
3 Ireland4.47
4 Spain4.46
5 Italy4.42
6 Estonia4.40
6 Mexico4.40
8 Chile4.33
9 France4.32
9 Turkiye4.32
11 Germany4.31
12 Poland4.30
13 Switzerland4.28
14 Hungary4.27
14 Japan 4.27
16 Greece4.25
17 United States4.23
18 Austria4.22
19 Finland4.17
20 Canada4.13
21 New Zealand4.12
22 Australia4.09
22 Lithuania4.09
24 Denmark4.08
24 United Kingdom4.08
26 Luxembourg4.07
26 Sweden4.07
28 Latvia4.06
29 Costa Rica4.04
30 Belgium4.00
31 Slovenia3.98
32 Norway3.89
33 Colombia3.87
34 Czech Republic3.84
35 Israel3.82
36 Iceland3.79
37 Netherlands3.73
38 Slovakia3.67

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 data38
Regression equation
Y = -1.032509 X +10.977
Correlation coefficient (r)-0.411
Coefficient of determination (R2)0.169

GDP per capita (current US$)
No. of data38
Regression equation
Y = -18812.224434 X +122782.470
Correlation coefficient (r)-0.149
Coefficient of determination (R2)0.022

Life expectancy at birth - Both sexes (years)
No. of data38
Regression equation
Y = 1.115282 X +75.217
Correlation coefficient (r)0.068
Coefficient of determination (R2)0.005

Fertility rate, total (births per woman)
No. of data38
Regression equation
Y = -0.632931 X +4.218
Correlation coefficient (r)-0.457
Coefficient of determination (R2)0.209

Suicide, age-standardized (per 100 000 population)
No. of data38
Regression equation
Y = -0.278181 X +11.016
Correlation coefficient (r)-0.015
Coefficient of determination (R2)0.000