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First published online May 31, 2016

The Power of the Like in Adolescence: Effects of Peer Influence on Neural and Behavioral Responses to Social Media

Abstract

We investigated a unique way in which adolescent peer influence occurs on social media. We developed a novel functional MRI (fMRI) paradigm to simulate Instagram, a popular social photo-sharing tool, and measured adolescents’ behavioral and neural responses to likes, a quantifiable form of social endorsement and potential source of peer influence. Adolescents underwent fMRI while viewing photos ostensibly submitted to Instagram. They were more likely to like photos depicted with many likes than photos with few likes; this finding showed the influence of virtual peer endorsement and held for both neutral photos and photos of risky behaviors (e.g., drinking, smoking). Viewing photos with many (compared with few) likes was associated with greater activity in neural regions implicated in reward processing, social cognition, imitation, and attention. Furthermore, when adolescents viewed risky photos (as opposed to neutral photos), activation in the cognitive-control network decreased. These findings highlight possible mechanisms underlying peer influence during adolescence.

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All materials have been made publicly available via Open Science Framework and can be accessed at https://osf.io/atj4d. The complete Open Practices Disclosure for this article can be found at http://pss.sagepub.com/content/by/supplemental-data. This article has received the badge for Open Materials. More information about the Open Practices badges can be found at https://osf.io/tvyxz/wiki/1.%20View%20the%20Badges/ and http://pss.sagepub.com/content/25/1/3.full.

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Published In

Article first published online: May 31, 2016
Issue published: July 2016

Keywords

  1. adolescent development
  2. social cognition
  3. social influences
  4. risk taking
  5. neuroimaging
  6. open materials

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© The Author(s) 2016.
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History

Manuscript received: September 12, 2015
Manuscript accepted: March 31, 2016
Published online: May 31, 2016
Issue published: July 2016
PubMed: 27247125

Authors

Affiliations

Lauren E. Sherman
Department of Psychology, University of California, Los Angeles
Ahmanson-Lovelace Brain Mapping Center, University of California, Los Angeles
Children’s Digital Media Center @ Los Angeles, University of California, Los Angeles, and California State University, Los Angeles
Ashley A. Payton
Interdepartmental Neuroscience Program, University of California, Los Angeles
Leanna M. Hernandez
Ahmanson-Lovelace Brain Mapping Center, University of California, Los Angeles
Interdepartmental Neuroscience Program, University of California, Los Angeles
Patricia M. Greenfield
Department of Psychology, University of California, Los Angeles
Children’s Digital Media Center @ Los Angeles, University of California, Los Angeles, and California State University, Los Angeles
Mirella Dapretto
Ahmanson-Lovelace Brain Mapping Center, University of California, Los Angeles
Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles

Notes

Lauren E. Sherman, Department of Psychology, UCLA, 1285 Franz Hall, Box 951563, Los Angeles, CA 90095-1563 E-mail: [email protected]
Author Contributions
L. E. Sherman developed the study concept, and L. E. Sherman, M. Dapretto, and P. M. Greenfield contributed to the study design. Data collection was performed by L. E. Sherman, A. A. Payton, and L. M. Hernandez. L. E. Sherman and A. A. Payton performed the data analysis and interpretation under the supervision of M. Dapretto and P. M. Greenfield. L. E. Sherman drafted the manuscript, and M. Dapretto and P. M. Greenfield provided important revisions. All the authors approved the final version of the manuscript for submission.

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