Abstract

Effect of Nudges on Downloads of COVID-19 Exposure Notification Apps

Highlights

  • Digital contact tracing smartphone applications can mitigate the spread of COVID-19 through exposure notification.[1,2,3,4] their success requires widespread use

  • Author affiliations and article information are listed at the end of this article. In this randomized clinical trial, 39 937 Pennsylvania members of Independence Blue Cross were randomly assigned to receive 1 email in a 2 × 2 design (Table 1)

  • In the social-norm condition, the message stated, “Over 650 000 Pennsylvanians have already downloaded the app!” This statement was absent in the no-social-norm condition

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Summary

Introduction

Digital contact tracing smartphone applications (apps) can mitigate the spread of COVID-19 through exposure notification.[1,2,3,4] their success requires widespread use. We examined the effectiveness of low-cost behavioral interventions (ie, nudges) in increasing downloads of Pennsylvania’s COVID Alert PA app. We explored the effectiveness of 2 nudges[5,6] on 39 937 individuals, one nudge displaying a descriptive social norm (vs not) and another framing the benefit of downloading for others (vs self)

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