Correlational finding on Happiness and subject: Number of children

StudyHalman et al. (1987): study ZZ EU 10 1981
TitleTraditie, Secularisatie en Individualisering. (Tradition, Secularization and Individualisation- a Study into the Values of the Dutch within a European Context
SourceTilburg University Press, 1987, Tilburg, Netherlands
Public18+ aged, general public, EU 10 nations, 1981
Sample
Non-Response
Respondents N =12464

Correlate
Author's labelNumber of children
Page in Source 212
Our classificationNumber of children
Operationalization
Direct question: "How many children do or did you 
have?"                      1 One                     
.
.
6 Six or more
Ss with children only

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
O-SLW-c-sq-n-10-aar=-.03 ns
France
O-SLW-c-sq-n-10-aar=-.03 ns
Great-Britain
O-SLW-c-sq-n-10-aar=-.07 p < .05
West Germany
O-SLW-c-sq-n-10-aar=-.07 p < .01
Italy
O-SLW-c-sq-n-10-aar=-.03 ns
Denmark
O-SLW-c-sq-n-10-aar=+.04 ns
Belgium
O-SLW-c-sq-n-10-aar=-.09 p < .01
Spain
O-SLW-c-sq-n-10-aar=-.12 p < .01
Ireland
O-SLW-c-sq-n-10-aar=-.06 ns
Northern Ireland

O-SLW-c-sq-n-10-aaDMt=-
EC (stratified sample)  
one                Mt'=  6.78
two                Mt'=  6.89
three              Mt'=  6.89
four               Mt'=  6.67
five               Mt'=  6.44
six or more        Mt'=  6.67


Appendix 1: Happiness measures used
CodeFull Text
O-SLW-c-sq-n-10-aaSelfreport on single question:

All things considered, how satisfied are you with your life as-a-whole now.....?
1 dissatisfied
2
3
4
5
6
7
8
9
10 satisfied


Appendix 2: Statistics used
SymbolExplanation
DMtDIFFERENCE of MEANS AFTER TRANSFORMATION
Type: descriptive statistic only.
Measurement level: Correlate: dichotomous, Happiness: metric
Theoretical range: [-10; +10]

Meaning: the difference of the mean happiness (happiness measured at a 0-10 rating scale) between the two correlate levels.
rPRODUCT-MOMENT CORRELATION COEFFICIENT (Also "Pearson's correlation coefficient' or simply 'correlation coefficient')
Type: test statistic.
Measurement level: Correlate: metric, Happiness: metric
Range: [-1; +1]

Meaning:
r = 0 no correlation ,
r = 1 perfect correlation, where high correlate values correspond with high happiness values, and
r = -1 perfect correlation, where high correlate values correspond with low happiness values.
Source:
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.
https://worlddatabaseofhappiness.eur.nl