Correlational finding on Happiness and subject: Attitudes to one's nutrition

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
Non-Response
Respondents N =796

Correlate
Author's labelStage of change in fruit and vegetable consumption
Page in Source 59
Our classificationAttitudes to one's nutrition
Operationalization
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%
Remarks
Scores derived from the following combinations of 
questions
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
Happiness
Measure
StatisticsElaboration/Remarks
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
SymbolExplanation
MWWILCOXON (MANN-WHITNEY) TWO SAMPLE TEST
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].

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