Correlational finding on Happiness and Inner locus of control
Subject code: P05bp

StudyBrook et al. (1979): study US Dakota County, Minnesota 1972
TitleOverview of Adult Health Status Measures Fielded in Rand's Health Insurance Study.
SourceMedical Care, 1979, Vol. 17
PublicHeads of households, Dayton , USA, 1972-1979
SampleProbability simple random sample
Respondents N =3441

Author's labelSelf-control
Page in Source 24 + 29 + 31 + 42
Our classificationInner locus of control, code P05bp
Self-report on 3 questions:
During the past month...
a. Have you been in firm control of your behavior, 
thought, emotions, or feelings? 
b. Have you had any reason to wonder if you were losing 
your mind, or losing control over the way you act, 
talk, think, or feel, or of your memory? 
c. Have you been feeling emotionally stable and sure of 
Observed distributionRange 3-18, M=16.00, SD=2.26
Error EstimatesInternal-Consistency=.72

Observed Relation with Happiness
C-BW-c-sq-l-11-ar=+.45 p < .01

Appendix 1: Happiness measures used
CodeFull Text
C-BW-c-sq-l-11-aSelfreport on single question:

Here is a picture of a ladder. Suppose we say that the top of the ladder represents the best possible life for you and the bottom represents the worst possible life for you. Where on the ladder do you feel you personally stand at the present time?
[ 10 ] best possible life
[ 9 ]
[ 8 ]
[ 7 ]
[ 6 ]
[ 5 ]
[ 4 ]
[ 3 ]
[ 2 ]
[ 1 ]
[ 0 ] worst possible life

Preceded by 1) open questions about what the respondent imagines as the best possible life and the worst possible life. 2) ratings on the ladder of one's life five years ago and where on the ladder one expects to stand five years from now.

Name: Cantril's self anchoring ladder rating of life (original)

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.