Correlational finding on Happiness and subject: Long term happiness (< 10 years ago)

StudyMussen et al. (1980): study US 1930
TitleContinuity and Change in Womens Characteristics over Four Decades.
SourceInternational Journal of Behavioral Development, 1980, Vol. 3, 333 - 347
PublicMothers, followed from age 30 to 70, Berkeley, USA, 1930-70
Sample
Non-Response
Respondents N =81

Correlate
Author's labelEarlier happiness
Page in Source 337
Our classificationLong term happiness (< 10 years ago)
Operationalization
Rating of cheerfulness (vs gloomy) on 7 point scale by 
independent interviewers
T1 (1930): Rating by two independent interviewers:
- clinical psychologist on the basis   of an interview, 
and  
- social worker on the basis of   observations during 
visits at home   and during tests of the child at   
university
T2 (1970): Rating by one interviewer on the basis of an 
extensive interview
Remarks
Guidance group only (N=53)

Observed Relation with Happiness
Happiness
Measure
StatisticsElaboration/Remarks
A-CP-g-fi-n-7-aDMt=0
T1:  M=3.7  SD=1.1  Mt'=4.51
T2:  M=3.7  SD=1.2  Mt'=4.51
O-SLC-g-fi-v-7-bDMt=-0.7
T1:  M=4.0  SD=1.2  Mt'=5.01
T2:  M=3.6  Sd=1.3  Mt'=4.34


Appendix 1: Happiness measures used
CodeFull Text
A-CP-g-fi-n-7-aSelfreport in focused interview:

Rating of cheerfulness by interviewer on the basis of an extensive interview.

Rating options:
7 cheerful
6
5
4
3
2
1 gloomy
O-SLC-g-fi-v-7-bSelfreport in focused interview

Two independent interviews. Each interviewer rated `satisfaction with lot' on the same scale.
1 tremendously satisfied
2
3
4 average
5
6
7 extremely dissatisfied


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.
Source:
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.
https://worlddatabaseofhappiness.eur.nl