Correlational findings

Study Conner & Brookie (2017): study NZ Auckland 2015

Student participants and controls in a 2 week food intervention, New Zealand 2015
Survey name
Unnamed study
N = 426
Non Response
Multiple assesment methods
Online-daily diary surveys Laboratory session


Authors's Label
Fruits and Vegetable Intervention (FVI)
Our Classification
Participants were randomly assigned to:
1 Experimental group for  a 14 day Fruits and Vegetable Intervention (FVI)
0 Control group instructed to follow diet as usual

The intervention involved:
a: vouchers for purchasing fruits and vegetables and e-mail message reminders to increase their consumption
b: two addoitional daily servings of fruits and vegetables on top of their normal diet

Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks A-AB-md-mqr-v-5-c b = + CHANGE mood in experimental group
- positive mood  +.02 (01)
- negative mood  -.01 (90)
A-AB-md-mqr-v-5-c b = 0 CHANGE hange mood in control group
- positive mood  +.01 (53)
- negative mood  -.01 (14)

The authors write: "the experimental conditions did not show any improvements in
negative or positive mood relative to participants in the control condition (comments to table 3). The authors did not compute Affect Balance.
The data imply that Affect Balance has increased in the experimental group, PA going up and NA going down. Affect balance did not change in the control group. Statistical significance of this difference between experimental and control group has not been assessed.