Correlational finding on Happiness and Past happiness ( 1 to 10 years ago)
Subject code: H04ab01b

StudyBachman et al. (1978): study US 1966
TitleYouth in Transition, Vol. VI. Adolescence to Adulthood. Change and Stability in the Lives of Young Men.
SourceInstitute for Social Research, 1978, University of Michigan, Ann Arbor, USA
PublicPublic highschool boys followed 8 years from grade 10, USA, 1966-74
Sample
Non-Response2.8% at T1, 17.2% at T2, 21.0% at T3, 28.9% at T4, 28.5% at T5
Respondents N =1628

Correlate
Author's labelHappiness
Page in Source 291
Our classificationPast happiness ( 1 to 10 years ago), code H04ab01b
Operationalization
Six item index of closed questions:
"Describe the kind of person you are:
1 I feel like smiling
2 I generally feel in good spirits
3 I feel happy
4 I am satisfied with my life
5 I find a good deal of happiness in   life
6 I feel sad"
Scored: Almost always true,often true, sometimes true, 
seldon true, never true

Assessed at:
T1 Fall 1966
T2 Spring 1968
T3 Spring 1969
T4 Spring 1970
Remarks
Raw correlations provided by the author:

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
O-HP-g-mq-v-5-ar=+.54 p < .001
T1-T2  1.5 yr
O-HP-g-mq-v-5-ar=+.45 p < .001
T1-T3  2.5 yr
O-HP-g-mq-v-5-ar=+.43 p < .001
T1-T4  3.5 yr
 
O-HP-g-mq-v-5-ar=+.64 p < .001
T2-T3  1   yr
O-HP-g-mq-v-5-ar=+.53 p < .001
T2-T4  1   yr
O-HP-g-mq-v-5-ar=+.54 p < .001
T3-T4  1   yr

Attenuated overtime correlations: 
O-HP-g-mq-v-5-ar=+.75 p < .001
T1-T2
O-HP-g-mq-v-5-ar=+.84
T2-T3
O-HP-g-mq-v-5-ar=+.89 p < .001
T3-T4

Estimated yearly stability:
O-HP-g-mq-v-5-ar=+.84 p < .001
T1-T2
O-HP-g-mq-v-5-ar=+.84 p < .001
T2-T3
O-HP-g-mq-v-5-ar=+.89 p < .001
T3-T4


Appendix 1: Happiness measures used
CodeFull Text
O-HP-g-mq-v-5-aSelfreport on 6 questions:

" Describe the kind of person you are. Please read each sentence, then mark how often it is true for you"
1 I feel like smiling
2 I generally feel in good spirits
3 I feel happy
4 I am very satisfied with life
5 I find a good deal of happiness in life
6 I feel sad

Response options:
5 almost always true
4 often true
3 sometimes true
2 seldom true
1 never true

Summation: average
Possible range: 1 to 5


Appendix 2: Statistics used
SymbolExplanation
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