Correlational finding on Happiness and Restrictions to social functioning
Subject code: H14ac02d

StudyLangeveld (1998): study NL 1992
TitleQuality of Life in Adolescents with Migraine and Other Headaches.
SourceThesis, Erasmus University Rotterdam, 1998, Netherlands. ISNB 90 90 12 007 6
PublicSecundary school pupils, Netherlands, 199?
SampleNon-probability chunk sample
Respondents N =223

Author's labelHeadache impact on daily activities
Page in Source 39, 43,44
Our classificationRestrictions to social functioning, code H14ac02d
Selfreport on 8 questions about feeling in the last 
- My headache interfered with my homework

Rated on an 4-point numerical scale
0= rarely or never/not at all
1= sometimes/a little
2= often/quite a bit
3= very often or always/very much
Observed distributionM/nx=.73; SD/nx=.66 (nx= number of items in the subscale)
Error EstimatesAlpha=.87 (subjects without headache in the previous week excluded )

Observed Relation with Happiness
O-SLW-cw-sq-ol-11-ar=+.02 ns

Appendix 1: Happiness measures used
CodeFull Text
O-SLW-cw-sq-ol-11-aSelfreport on single question;

How satisfied or unsatisfied were you last week with your life in general?
Please answer this question below by drawing a cross on the line

completely completely

Scoring: mm on this 100 mm line

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.