What is beautiful is good: attractive avatars and healthier restaurant choices

When humans see something attractive, they tend to attribute other positive qualities to it (the so-called halo effect). Could this work for digital avatars in restaurants too? If avatar appearance influences customers psychologically, restaurants could use it deliberately to nudge healthier choices. This study examines how avatar appearance, humour, and persuasion style affect what diners order and how satisfied they feel.

How the research was done

The research used three experimental studies. Study 1 manipulated avatar appearance, comparing supermodel-looking avatars against normal-looking ones, and measured perceived attractiveness, warmth, and relatability. Studies 2 and 3 added moderators to refine the model: humour (present versus absent) and persuasion style (health-oriented versus beauty-oriented messaging). Throughout, the studies tracked how these factors flowed through psychological mechanisms (social comparison and aspirational appeal) into customer satisfaction and food choices.

What the research found

Supermodel-looking avatars evoked stronger aspirational appeal and positive social comparison than normal-looking ones, and these psychological responses translated into both healthier food choices and higher customer satisfaction. Humour amplified the effect of appearance on attractiveness. Persuasion style mattered too: beauty-oriented persuasion strengthened the effect of appearance on social comparison and aspirational appeal more than health-oriented persuasion did. The findings suggest that the aesthetic of the avatar, combined with the right tone and message framing, can meaningfully shape diner behavior toward healthier outcomes.

Insights for the industry

Restaurants deploying avatar technology should design avatars with the appearance dimension in mind, and pair them with humour and well-chosen persuasion framing. Surprisingly, beauty-oriented framing (suggesting that a dish helps you look your best) may be more effective than direct health framing for triggering healthier choices, particularly when combined with aspirational avatar appearance. AI developers can use these findings as design benchmarks for avatar systems intended for service roles, treating appearance, humour, and persuasion style as design parameters rather than afterthoughts. Health advocates and public health campaigns can borrow the same playbook, pairing attractive presentation with aspirational appeal and humour to make healthy messaging actually land. The findings also raise important ethical questions about beauty norms and body image, which restaurants and developers should consider in deployment, particularly when targeting younger or vulnerable audiences.