Effectiveness of visual nudges for encouraging healthier beverage choices from vending machines

ISSUES ADDRESSED

Research suggests visual nudging techniques can subtly encourage healthier consumption. Two experiments explored the effect of four visual primes for nudging drink choices from a vending machine display.

METHODS

Participants (17-25 years) were randomly assigned to view vending machine advertising posters containing pictorial nudges of water, soft drink, general health (runner), or a text-only control, for nudging vending machine choices. Participants then selected an item from a vending machine display containing drinks only (Experiment 1; n = 164), or both drinks and snack foods (Experiment 2, n = 684).

RESULTS

In both experiments, nudging condition predicted beverage choice. Specifically, the water image nudged healthier beverage choices in both experiments. However, there was no effect on food choice in Experiment 2. Furthermore, in both experiments, liking and habitual consumption of chosen items were also significant predictors of choice, but condition predicted beverage choice over and above these.

CONCLUSION

A water prime may be an effective means of encouraging healthier beverage choices in a vending machine environment. SO WHAT?: Findings have the potential to inform strategies for encouraging healthier beverage choices from vending machine environments.

Heavy drinking occasions in Australia: do context and beverage choice differ from low-risk drinking occasions?

INTRODUCTION AND AIMS

The aim of the current study is to look for differences in drink choice and drinking location between a recent heavy drinking occasion (RHDO) and usual low-risk occasions among those that recently had both types of drinking occasion.

DESIGN AND METHODS

Seven hundred and seventy-four respondents to a population-based survey reported having a RHDO [8 + Australian standard drinks (ASD) for females, 11 + ASD for males] in the past six months also reported that their usual drinking occasion in at least one location involved less than five ASD. Drink choice and drinking locations for the RHDO and usual low-risk occasions were compared using confidence intervals.

RESULTS

The RHDO was more likely than usual low-risk occasions to occur away from licensed premises (59%), despite a higher percentage of respondents reporting drinking at a pub, bar or nightclub on a RHDO (28%) than on a usual low-risk night (12%). A higher percentage of respondents nominated bottled spirits (33%) as their main drink for their RHDO, with 11% primarily drinking bottled spirits on a usual low-risk occasion; the converse was true for bottled wine (20% and 33%, respectively).

DISCUSSION AND CONCLUSIONS

While the high proportion of RHDOs that occurred at least in part at pubs or nightclubs was not surprising, a high proportion also occur in private homes. Previously found links between heavy drinking and beer may be a reflection of the usual drink choice of heavier drinkers, rather a choice specific to a particularly heavy occasion.