Promoting healthy and sustainable diets: barriers and enablers for successful policy activities in Australia

The participation of lifeworld experts in Delphi processes: A reflection on method and practice

Delphi studies have established themselves in the health sciences as a means to systematically and, ideally, synthesize expert opinions into a consensus on concrete issues. As participatory health research increases in relevance, lifeworld experts (e.g., patients, caregiving relatives) are being included in Delphi surveys and their opinions placed alongside those of professional and scientific experts. Looking at the theory and methodology, we discuss the opportunities and challenges concerning result quality and derive practical implications for conducting Delphi studies involving lifeworld experts alongside scientific and/or professional experts. Delphi techniques are understood here to be social interaction processes whose outcomes are a result of the participating experts' conscious, cognitive judgment processes, and also shaped by individual, situational and cultural factors. The more heterogeneous the expert panel, in particular when lifeworld experts are participating, the more these influences vary. Expert panel composition and how diversity is handled prove significant to Delphi study results. Our argument is based on an in-depth analysis of a systematic review of Delphi studies with lifeworld experts. We found that the inclusion of lifeworld experts in Delphi studies usually occurs relatively unsystematically and, furthermore, that results are not analysed separately according to expert group, although there would be good reasons for this. We have oriented the reporting here on PRISMA. To enhance the outcomes of Delphi studies that incorporate lifeworld experts alongside scientific and/or professional experts, we put forward specific recommendations that address potential biases arising from the participation of lifeworld experts.

Health and sustainability co-benefits of eating behaviors: Towards a science of dietary eco-wellness

Two of the greatest challenges of our times - climate change and the linked epidemics of obesity, diabetes, and cardiovascular disease - are fueled in part by the over-consumption of carbon-intensive high calorie foodstuffs. Converging evidence from hundreds of studies has confirmed that transitioning from diets high in meat and dairy to largely plant-based diets not only is necessary for climate change mitigation but will also lead to substantive reductions in morbidity and mortality. Nevertheless, there are only the faintest beginnings of a robust science of behavioral eco-wellness, defined here as the study of how individual choices, behaviors, and habits impact both personal health and environmental sustainability. This paper focusses on the sub-field of dietary eco-wellness, which looks at health and sustainability impacts of food production, procurement, preparation, and consumption. To advance this crucial agenda, investigators will need to invent, develop, and assess approaches aimed at helping people transition towards healthier and more sustainable diets. In order to accurately and reliably assess appropriate outcomes, existing assessment methods will need to be refined, new techniques will need to be advanced, and all measurement methods will need to be validated. Local conditions will influence the effectiveness of various approaches, and so it is important that scientists and communities share their stories of success and challenge for others to learn from. This paper reviews emerging evidence from relevant studies in dozens of countries, suggesting next steps, potential pathways, and a framework for interpretation.

Application of theories of the policy process in research on consumption of sustainable diets: a systematic review

BACKGROUND

There is a significant global lack of policy action on consumption of sustainable diets. Application of political science theories such as theories of the policy process can help in understanding policy inaction. Applying these theories could provide a more in-depth understanding of how various influences on the policy process shape decision making for consumption of sustainable diet policy.

METHODS

A systematic review to examine application of eight key political science theories of the policy process to research on consumption of sustainable diets was conducted.

RESULTS

The review identified no papers applying a theory of the policy process although 17 papers did mention or discuss influences on the policy process that are common elements within theories of the policy process. Most notably these elements were the influence of coalitions/networks, evidence use, narratives and framing, institutional and political system factors, and the importance of value and belief systems and socio-cultural norms. However, in most papers these influences were not examined in a detailed or in-depth way and often presented as suggestions for lack of policy action without the support of empirical data or application of any theory.

CONCLUSIONS

Most research discussing policy inaction on the consumption of sustainable diets fails to utilise political science theories of the policy process, although a small number of papers include mention of or discussion of influences on the policy process. Application of political science theories could provide a more in-depth understanding of how different determinants might shape decision making at various points in the policy process. This could help identify key reasons for policy inaction on the consumption of sustainable diets and suggest possible ways to increase attention and action on the issue from policy decision makers.