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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 = -1.104777 X +11.192
Correlation coefficient (r)-0.555
Coefficient of determination (R2)0.308

GDP per capita (current US$)
No. of data38
Regression equation
Y = -24629.181828 X +145055.591
Correlation coefficient (r)-0.246
Coefficient of determination (R2)0.061

Life expectancy at birth - Both sexes (years)
No. of data38
Regression equation
Y = 0.526303 X +77.706
Correlation coefficient (r)0.040
Coefficient of determination (R2)0.002

Fertility rate, total (births per woman)
No. of data38
Regression equation
Y = -0.396402 X +3.204
Correlation coefficient (r)-0.361
Coefficient of determination (R2)0.130

Suicide, age-standardized (per 100 000 population)
No. of data38
Regression equation
Y = -2.454287 X +19.871
Correlation coefficient (r)-0.171
Coefficient of determination (R2)0.029