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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:
38 countries/ areas
Highlight:
1 Republic of Korea4.61
2 Turkiye4.54
3 Portugal4.50
3 Spain4.50
5 Italy4.44
6 Mexico4.41
7 Ireland4.40
7 Japan 4.40
9 Greece4.32
10 Hungary4.30
11 Germany4.27
12 Estonia4.25
13 Switzerland4.23
14 Chile4.18
14 United Kingdom4.18
16 Costa Rica4.17
17 Austria4.12
18 United States4.11
19 France4.07
20 Poland4.05
21 Australia4.01
22 New Zealand4.00
22 Slovenia4.00
24 Luxembourg3.97
25 Denmark3.94
26 Finland3.92
26 Latvia3.92
28 Belgium3.90
29 Canada3.87
29 Israel3.87
29 Lithuania3.87
29 Sweden3.87
33 Colombia3.81
34 Norway3.68
35 Netherlands3.60
36 Czech Republic3.59
37 Slovakia3.58
38 Iceland3.56

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 = -1.212991 X +11.656
Correlation coefficient (r)-0.532
Coefficient of determination (R2)0.283

GDP per capita (current US$)
No. of data38
Regression equation
Y = -21322.912508 X +131286.412
Correlation coefficient (r)-0.216
Coefficient of determination (R2)0.047

Life expectancy at birth - Both sexes (years)
No. of data38
Regression equation
Y = 0.681284 X +77.647
Correlation coefficient (r)0.074
Coefficient of determination (R2)0.005

Fertility rate, total (births per woman)
No. of data38
Regression equation
Y = -0.266154 X +2.664
Correlation coefficient (r)-0.247
Coefficient of determination (R2)0.061

Suicide - all ages (per 100,000 population)
No. of data38
Regression equation
Y = -1.671367 X +19.236
Correlation coefficient (r)-0.087
Coefficient of determination (R2)0.008