Correlational finding on Happiness and subject: Change in health-behavior

StudyPettay (2008a): study US 2006
TitleHealth Behaviors and Life Satisfaction in college Students.
SourcePhD Thesis, Kansas State University, 2008, USA
PublicUniversity students, Illinois, USA, 2007
SampleSampling not reported
Respondents N =796

Author's labelStage of change in fruit and vegetable consumption
Page in Source 59
Our classificationChange in health-behavior
Self report on questions about change for fruit and 
vegetable consumption:
1: precontemplation
2: contemplation
3; preparation
4: action
5: maitenance
Observed distribution1: 48%, 2: 6%, 3: 37%, 4: 2%, 5: 7%
Scores derived from the following combinations of 
A: How many servings of fruits and vegetables do you 
usually eat a day? (0 to.6 or more)
B: Do you intend to eat more than 5 servings in the 
next 6 monnths? (yes/no)
C: Do you intend to start eating 5 or more servings in 
the next 30 days? (yes/no)
D: Have you been eating 5 or more servings in the last 
6 months? (yes/no)
1 = A<4 + B no
2 = A,<4 + C no
3 = A <5 + D no
4 = A<5 + D yes

Observed Relation with Happiness
O-Sum-u-mq-v-5-bcMW=+ ns
Similar for males and females

Appendix 1: Happiness measures used
CodeFull Text
O-Sum-u-mq-v-5-bcSelfreport on 3 questions:

Using the 1-5 scale below, indicate your agreement with each of the items by placing the appropriate number on the line preceding that item. Please be open and honest in your responding.
A In most ways my life is close to ideal
B The conditions of my life are excellent
C I am satisfied with my life

Answers rated:
5 strongly agree
4 slightly agree
3 neither agree nor disagree
2 slightly disagree
1 strongly disagree

Computation:( A+B+C)/3

Name: Shortened Diener's Satisfaction with Life Scale (SWLS)

Appendix 2: Statistics used
Type: statistical procedure.
Measurement level: Correlate: dichotomous, Happiness: ordinal
Symbol test statistic: W (Wilcoxon) or U (Mann-Whitney).
Relationship: W = U + n1(n1 + 1), where n1 and n2 = Ne - n1 , while n1 <= n2, are the sizes of the two samples.
Range U [ 0; n1n2 ] and W [ n1(n1 + 1); n1(n1+ 2n2 +1].

At the limit values of U and W there is the strongest possible association.
U = n1n2 <-> W = n1(Ne + 1) no association.
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.