Study | Pettay (2008a): study US 2006 |

Title | Health Behaviors and Life Satisfaction in college Students. |

Source | PhD Thesis, Kansas State University, 2008, USA |

Public | University students, Illinois, USA, 2007 |

Sample | Sampling not reported |

Non-Response | |

Respondents N = | 796 |

Correlate | |

Author's label | Fruit and vegetables consumption |

Page in Source | 46, 53 |

Our classification | What one eats |

Operationalization | Selfreport on single question: How many servings of fruits and vegetables do you usually eat per day? |

Observed distribution | M = 4,21, SD = 1,95 |

Observed Relation with Happiness | ||

Happiness Measure | Statistics | Elaboration/Remarks |

O-Sum-u-mq-v-5-bc | r=+.12 p < .01 | All |

O-Sum-u-mq-v-5-bc | r=+.13 p < .05 | Males only |

O-Sum-u-mq-v-5-bc | r=+.11 p < .05 | Females only |

O-Sum-u-mq-v-5-bc | Beta=+.04 ns | All: Beta controled for other health behaviors - stress mnagement - BMI - Physical activity |

O-Sum-u-mq-v-5-bc | rpc=+.04 ns | All rpc controled for other health behaviors - stress mnagement - BMI - Physical activity |

Appendix 1: Happiness measures used

Code | Full Text |

O-Sum-u-mq-v-5-bc | Selfreport 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

Symbol | Explanation |

Beta | STANDARDIZED REGRESSION COEFFICIENT by LEAST SQUARES (OLS) Type: test statistic. Measurement level: Correlates: all metric, Happiness: metric. Range: [-1 ; +1] Meaning: beta > 0 « a higher correlate level corresponds to a higher happiness rating on average. beta < 0 « a higher correlate level corresponds to a higher happiness rating on average. beta = 0 « no correlation. beta = + 1 or -1 « perfect correlation. |

r | PRODUCT-MOMENT CORRELATION COEFFICIENT (Also "Pearson's correlation coefficient' or simply 'correlation coefficient') Type: test statistic. Measurement level: Correlate: metric, Happiness: metric Range: [-1; +1] Meaning: 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. |

rpc | PARTIAL CORRELATION COEFFICIENT Type: test statistic Measurement level: Correlate: metric, Happiness: metric Range: [-1; +1] Meaning: a partial correlation between happiness and one of the correlates is that correlation, which remains after accounting for the contribution of the other influences, or some of them, to the total variability in the happiness scores. Under that conditions rpc > 0 « a higher correlate level corresponds with a higher happiness rating, rpc < 0 « a higher correlate level corresponds with a lower happiness rating, |

Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.

https://worlddatabaseofhappiness.eur.nl