Choice architecture interventions for increased vegetable intake and behaviour change in a school setting: a systematic review

Aims: The primary objective of this review is to assess the prevalence and quality of published studies on the effect of choice architectural nudge interventions promoting vegetable consumption among adolescents. Additionally, this review aims to identify studies estimating adolescents’ attitude towards choice architectural nudge interventions. Methods: Web of Science, Scopus and PubMed were searched systematically for experimental studies with a predefined search strategy in the period November–December 2013. Publications were included following predetermined inclusion criteria. Studies were evaluated as of high, moderate or weak quality. Finally, studies were grouped by the type of intervention and underwent a narrative synthesis. Results: The search showed that only very few studies investigated the effects of choice architectural nudging interventions on vegetable consumption, and none of them had attitude towards behavioural interventions as an outcome measure. Twelve studies met the inclusion criteria. The results of the 12 studies were inconclusive, and the majority of studies were of weak or moderate quality. Conclusion: This review uncovers a gap in knowledge on the effect of choice architectural nudge interventions aiming to promote the intake of vegetables among adolescents in a school context. It also highlights that no previous studies have considered the attitudes towards choice architectural nudge interventions as a potential factor for their success – or lack thereof – in achieving the desired goal of increased vegetable consumption.