Correlational finding on Happiness and Actual changes in happiness
Subject code: H04ab02

StudyNaess et al. (2004): study NO Nord-Trøndelag 1984
TitleDiabetes Mellitus and Psychological Well-Being. Change between 1984-1986 and 1995-1997. Results of the Nord-Trondelag Health Study.
SourceJournal of Diabetes and its Complications, 2004, Vol. 18,141 - 147.
DOIDOI:10.1016/S1056-8727(03)00036-9
Public20-90 aged, general public, Nord-Trondelag, Norway followed 1 year, 1985-1996
SampleNon-probability chunk sample
Non-Response
Respondents N =65599

Correlate
Author's labelCheerfulness over time
Page in Source 144
Our classificationActual changes in happiness, code H04ab02
Operationalization
Selfreport on single question:
Would you say you are usually cheerful or dejected?
1  extremely dejected
2  dejected
3  quite dejected
4  both dejected and cheerful
5  quite cheerful
6  very cheerful
7  extremely cheerful
Remarks
Assessed at T1 (1984-86) and T2 (1995-97); average 11 
years difference

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
A-AOL-g-sq-v-7-ar=+.39
T1 retest
A-AOL-g-sq-v-7-aES=+.18
T1-T2 CHANGE in happiness
Cheerfulness increased slightly


Appendix 1: Happiness measures used
CodeFull Text
A-AOL-g-sq-v-7-aSelfreport on single question:

Would you say you are usually cheerful or dejected?
1 extremely dejected
2 dejected
3 quite dejected
4 both dejected and cheerful
5 quite cheerful
6 very cheerful
7 extremely cheerful


Appendix 2: Statistics used
SymbolExplanation
ESEFFECT SIZE
Type; descriptive statistic
Range: [-1;+1]

Meaning:

Computation: T1-T2 mean devided by pooled SD

Interpretation: ES<.20 trivial, .20>ES>.50 small, .50>ES>.80 medium, >.80 large effect

Reference: Cohen
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