Using decision aids to support self-isolation during the COVID-19 pandemic.

Objective: Self-isolation is a vital element of efforts to contain COVID-19. We set out to test whether decision aids can support self-isolation.

Design: We conducted a pre-registered online experiment with a nationally representative sample (n = 500).

The surplus identification task and limits to multiattribute consumer choice.

We introduce and demonstrate a novel experimental method for investigating the accuracy of consumer decision making. The Surplus Identification (S-ID) task exploits techniques from detection theory. Experimental control over surpluses is established by incentivizing participants to adopt a predetermined, objectively defined preference function.