Cited by 190Media Influence and HealthBehavioral Health and InterventionsDeath Anxiety and Social Exclusion

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Self-affirmation alters the brain’s response to health messages and subsequent behavior change.

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Falk, Emily B., O’Donnell, Matthew Brook, Cascio, Christopher N., Tinney, Francis, Kang, Yoona, Lieberman, Matthew D., Taylor, Shelley E., An, Lawrence, Resnicow, Kenneth, Strecher, Victor J.·2015·Proceedings of the National Academy of Sciences

DOI 10.1073/pnas.1500247112PMC PMC4343089

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Abstract

Health communications can be an effective way to increase positive health behaviors and decrease negative health behaviors; however, those at highest risk are often most defensive and least open to such messages. For example, increasing physical activity among sedentary individuals affects a wide range of important mental and physical health outcomes, but has proven a challenging task. Affirming core values (i.e., self-affirmation) before message exposure is a psychological technique that can increase the effectiveness of a wide range of interventions in health and other domains; however, the neural mechanisms of affirmation's effects have not been studied. We used functional magnetic resonance imaging (fMRI) to examine neural processes associated with affirmation effects during exposure to potentially threatening health messages. We focused on an a priori defined region of interest (ROI) in ventromedial prefrontal cortex (VMPFC), a brain region selected for its association with self-related processing and positive valuation. Consistent with our hypotheses, those in the self-affirmation condition produced more activity in VMPFC during exposure to health messages and went on to increase their objectively measured activity levels more. These findings suggest that affirmation of core values may exert its effects by allowing at-risk individuals to see the self-relevance and value in otherwise-threatening messages.

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The neurobiology of social influences: Conformity, persuasion, and group dynamics
Votinov, M. (2026) · Elsevier eBooks · doi:10.1016/b978-0-443-34080-2.00019-6

Authors: Falk, E. B., O’Donnell, M. B., Cascio, C. N., Tinney, F., Kang, Y., Lieberman, M. D., Taylor, S. E., An, L., Resnicow, K., & Strecher, V. J.
Affiliations: University of Pennsylvania (US)
University of Michigan (US)
University of California, Los Angeles (US)
Center for Health Communications Research, University of Michigan, Ann Arbor, MI 48109; and
ORCID: Falk, Emily B.
O’Donnell, Matthew Brook
Cascio, Christopher N.
Tinney, Francis
Kang, Yoona
Lieberman, Matthew D.
An, Lawrence
Strecher, Victor J.
Venue: Proceedings of the National Academy of Sciences
Publisher: National Academy of Sciences
Published: 2015-02-02
Volume: 112
Issue: 7
Pages: 1977-1982
ISSN: 0027-8424 (ISSN-L)
1091-6490
DOI: 10.1073/pnas.1500247112
PMC: PMC4343089
OpenAlex: W2136204897
Cited by: 190
References: 76
Citations by year: 2026: 12 · 2025: 14 · 2024: 8 · 2023: 9 · 2022: 24 · 2021: 18 · 2020: 14 · 2019: 15 · 2018: 28 · 2017: 20 · 2016: 22 · 2015: 5
FWCI: 403.19
Type: journal article
Language: en
Open access: bronze
doi.org
Licence: www.pnas.org/site/misc/userlicense.xhtml (vor, 181 d)
Locations: Proceedings of the National Academy of Sciences (publishedVersion)
Europe PMC (PubMed Central) (publishedVersion)
PubMed Central (publishedVersion)
PubMed (publishedVersion)
eScholarship (California Digital Library) (submittedVersion, cc-by-nd)
Funders: HHS | NIH | National Cancer Institute (NIH-P50 CA101451, NIH/NCI 1R01CA180015-01)
HHS | NIH | NIH Office of the Director (1DP2DA03515601)
Topics: Social Sciences › Communication › Media Influence and Health
Social Sciences › Psychology › Applied Psychology › Behavioral Health and Interventions
Social Sciences › Psychology › Social Psychology › Death Anxiety and Social Exclusion
Keywords: self-affirmation, core values, health communication, health messaging, ventromedial prefrontal cortex, physical activity, sedentary behavior, behavior change, threat processing, self-relevance
MeSH terms: Behavior Therapy, Brain, Humans, Magnetic Resonance Imaging, Sedentary Behavior

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Self-affirmation alters the brain’s response to health messages and subsequent behavior change.

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