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The limits of simple implementation intentions: Evidence from a field experiment on making plans to exercise
Journal article   Open access   Peer reviewed

The limits of simple implementation intentions: Evidence from a field experiment on making plans to exercise

Mariana Carrera, Heather Royer, Mark Stehr, Justin Sydnor and Dmitry Taubinsky
Journal of health economics, v 62
Nov 2018
PMID: 30336306
url
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7872013View
Accepted (AM)Open Access (License Unspecified) Open

Abstract

Behavioral economics Exercise Health behaviors Implementation intentions Nudge Physical activity Planning
Recent large-scale randomized experiments find that helping people form implementation intentions by asking when and where they plan to act increases one-time actions, such as vaccinations, preventative screenings and voting. We investigate the effect of a simple scalable planning intervention on a repeated behavior using a randomized design involving 877 subjects at a private gym. Subjects were randomized into i) a treatment group who selected the days and times they intended to attend the gym over the next two weeks or ii) a control group who instead recorded their days of exercise in the prior two weeks. In contrast to recent studies, we find that the planning intervention did not have a positive effect on behavior. We observe a tightly estimated null effect even though the majority of subjects believed that planning is helpful and despite clear evidence that they engaged with the planning process.

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19 citations in Scopus

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Collaboration types
Domestic collaboration
Web of Science research areas
Economics
Health Care Sciences & Services
Health Policy & Services
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