Table 1 Allocation principles by Persad et al.39, with the addition of autonomy40,41, and corresponding examples in the context of allocating human support for preparing for quitting smoking

From: Psychological, economic, and ethical factors in human feedback for a chatbot-based smoking cessation intervention

Allocation principle

Example for preparing to quit smoking

Treating people equally

Lottery

- Random allocation

First-come, first-served

- Longest time since last human support

Favoring the worst-off: prioritarianism

Sickest first

- Least likely to successfully prepare for quitting smoking without human support

- Most likely to experience negative consequences of smoking in the future without human support

Youngest first

- Youngest first

Maximizing total benefits: utilitarianism

Prognosis

- Largest increase in the chance of successfully preparing for quitting smoking because of the support

- Largest reduction in the negative consequences of smoking in the future because of the support

Promoting and rewarding social usefulness

Instrumental value

- Largest value to society in the future (e.g., healthcare staff, workers producing influenza vaccine, people who agree to improve their health and thus use fewer resources in the future)

Reciprocity

- Past usefulness or sacrifice (e.g., past organ donors, people who participated in vaccine research, people who made healthy lifestyle choices that reduced their need for resources in the past)

Respecting autonomy

Autonomy

- Highest appreciation of human support