Using social media and mobile gaming to improve the vegetable intake of young adults

Australian Dietary Guidelines recommend five servings of vegetables daily for prevention of chronic disease, but only 7% of adults achieve this. The initial stages of this thesis involved secondary analysis of the 2011-12 National Nutrition and Physical Activity Survey data. Results showed young adults aged 18-24 years were the poorest consumers of vegetables, with mean intake of 2.7 serves daily. To inform the design of a targeted intervention using new technology the PhD candidate systematically reviewed the literature and found mobile-phone based interventions have positive effects on vegetable consumption (Cohen’s d 0.15,95% CI 0.04–0.28). Notably, engagement was low among young adults and few studies harnessed novel strategies such as social media or gamification for program delivery. Yet 95% of young adults own a smartphone and 91% use their device for game play or social networking. The final stage of this thesis involved the development of a 4-week social media and mobile-gaming intervention underpinned by behavioural theory, to addresses key barriers to, and psychosocial determinants of, vegetable intake. Behaviour change techniques demonstrated to mediate success, such as goal setting and self-monitoring were integrated. Short mobile-phone delivered cooking videos were developed to address the low level of cooking literacy among this age group, with focus group testing confirming their acceptability among the target audience. A factorial study design was used to determine the feasibility of delivering the program. This was the first study to explore the impact of social support using social media in combination with gaming elements in a nutrition intervention for young adults. The research revealed that it is feasible and practical to deliver behaviour change interventions to young adults using these novel communication mediums. The accessibility of these platforms could allow the dissemination of individual behaviour change interventions at scale