Correlational finding on Happiness and subject: Sum of negative life-events

StudyBlock & Zautra (1981): study US Arizona 1979
TitleSatisfaction and Distress in a Community: A Test of the Effects of Life Events.
SourceAmerican Journal of Community Psychology, 1981, Vol. 9, 165 - 180
PublicGeneral public, 3 cities, Arizona, USA, 1979
SampleProbability sample (unspecified)
Non-Response11 %
Respondents N =537

Author's labelNegative Events
Page in Source 175
Our classificationSum of negative life-events
Life events were assessed with a 65-item inventory 
developed by revising the SRRS (Holmes and Rahe 1967) 
and adding positive life event

Ss were asked two questions about each event listed on 
the directory
-first, whether the event had taken  place in their 
lives, during the past year.
-second, to rate, whether the event turned out positive 
(PE), negative, (NE), had both positive and negative 
outcomes or had no effect on them.
Events rated as having both positive and negative 
outcomes were not scored for PE and NE (about 10%).
Observed distributionM=2.52 SD=3.46
Error EstimatesInternal consistency: average intercorrelation +.83
correlation PE & NE r=-.22  p<.001

Observed Relation with Happiness
O-DT-u-sqt-v-7-ar=-.26 p < .00

Appendix 1: Happiness measures used
CodeFull Text
O-DT-u-sqt-v-7-aSelfreport on single question, asked twice in interview:

How do you feel about your life as a whole......?
7 delighted
6 pleased
5 mostly satisfied
4 mixed
3 mostly dissatisfied
2 unhappy
1 terrible

Summation: arithmetic mean

Name: Andrews & Withey's "Delighted-Terrible Scale" (original version)
Also known as Lehman's 'Global life satisfaction'

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.