Correlational finding on Happiness and Extraverted
Subject code: P05az

StudyHeadey & Krause (1994): study AU 1981
TitleInequalities of Income, Health and Happiness: The Stratification Paradigm and Alternatives.
SourcePaper presented at the 13th World Congress of Sociology, 1994, Bielefeld, Germany
Public18-65 aged, general public, Victoria, Australia, followed from 1981 to 1989
SampleProbability simple random sample
Respondents N =502

Author's labelExtraversion
Page in Source 15+51
Our classificationExtraverted, code P05az
Self report on 24 questions measuring sociability an 
Eysenk Personality Inventory
(Items moet ik nog opzoeken)
Error EstimatesCrombach alpha 0.63

Observed Relation with Happiness
O-DT-u-sqt-v-9-ar=+.18 p < .05
1981 Extraversion by 1983 Happiness: raw r
O-DT-u-sqt-v-9-ar=+.25 p < .05
1981 Extraversion by 1983 Happiness: disattenuated
Disattenuated correlation were obtained assuming 
validity coefficient of 0.63 for extraversion and 
0.8 for happiness

Appendix 1: Happiness measures used
CodeFull Text
O-DT-u-sqt-v-9-aSelfreport on single question asked twice

'How do you feel about your life as a whole?'
1 terrible
2 very unhappy
3 unhappy
4 mostly dissatisfied
5 mixed feelings
6 mostly satisfied
7 pleased
8 very pleased
9 delighted

Appendix 2: Statistics used
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]

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.
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.