Findings on happiness in Conner & Brookie (2017): study NZ Auckland 2015

Author(s)Conner, T.S.; Brookie, K.L.
TitleLet them eat fruit! The effect of fruit and vergetable consumption on the psychological well-being in young adukts: A randomized controlled trial
SourcePLOS one, febr. 3 2017
PublicStudent participants and controls in a 2 week food intervention, New Zealand 2015
 Students at the University of Otago, New Zealand; Low in consumption of Fruits and vegetables
Collect periodMarch 2015
Last assesment2015
Last collect periodNovember 2015
Survey nameUnnamed study
 Australia New Zealand Clinical Trials Registry (ANZCTRN12615000183583)
SampleProbability simple random sample
Respondents N =426
 Excluded n=252 1. Not 18-25 years (n=30) 2. No access to smartphone (n=9) 3. Typically ate >3 servings of FV per day (n=30) 4. Antidepressants (n=22)
Non Response174
AssesmentMultiple methods
 Online-daily diary surveys Laboratory session
General remarksFollow up study
Happiness measure(s) used
Full textSelfreport on 19 questions repeated 13 days To what extent did you feel today,, A happy B enthusiastic C relaxed D sad E anxious F angry Rated 1 not at all 2 3 4 5 extremely Computation: (A +B+C) - (D+E+F)
Author's labelnegative and positive mood
RemarksABS computed by WDH team PA 2,05 - NA 0,77
Finding used in
nation ranks
 On original range -4 - 4On range 0 - 10
Standard deviation

Correlational findings

Author's label Our subject description
Fruits and Vegetable Intervention (FVI)show  What one eats