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Public Health On Call

983 - Why Do We Believe Misinformation?

Public Health On Call

The Johns Hopkins Bloomberg School of Public Health

News, Health & Fitness, Medicine

4.6 • 644 Ratings

🗓️ 4 December 2025

⏱️ 19 minutes

🧾️ Download transcript

Summary

About this episode:

Whether it's a social media post claiming that CBD oil can cure cancer or a very convincing AI video of a dog driving a semi-truck, falsehoods abound in our lives. But why do we believe misinformation, even when presented with evidence that debunks it? In this episode: Matthew Facciani, an expert on the topic, details the psychological identities and biases that make us vulnerable to false information and explains how good information can break through.

Guests:

Matthew Facciani, PhD, is an interdisciplinary social scientist and the author of "Misguided: Where Misinformation Starts, How It Spreads, and What to Do About It".

Host:

Lindsay Smith Rogers, MA, is the producer of the Public Health On Call podcast, an editor for Expert Insights, and the director of content strategy for the Johns Hopkins Bloomberg School of Public Health.

Show links and related content:

Transcript information:

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Transcript

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0:00.0

Welcome to Public Health On Call, a podcast from the Johns Hopkins Bloomberg School of Public Health,

0:05.9

where we bring evidence, experience, and perspective to make sense of today's leading health challenges.

0:16.3

If you have questions or ideas for us, please send an email to public health question at jhhhu.edu.

0:23.8

That's public health question at jhhu.edu for future podcast episodes.

0:31.1

It's Lindsay Smith Rogers.

0:33.2

Today, the psychology of misinformation.

0:36.0

I talk with Matthew Facciani, author and social scientist,

0:39.4

about how we can understand more about misinformation by thinking about how our psychological biases

0:44.9

influence how we process information. We also talk about ways to be more empathetic to reduce

0:50.5

polarization and how to build up our own immunity against false information. Let's listen. Matthew Facciani, thank you so much for being on public telephone call. How are you? I'm doing well. How are you doing? I'm okay. Hanging in there. So we're talking to you today about misinformation. Something that we've really covered quite a bit in this podcast, but we're going to come at it from a unique angle.

1:15.8

And part of that angle is, would you tell us a little bit about your background and your work?

1:21.3

Yeah, so I do have a bit of an interdisciplinary background, a bit of a unique path to where I am right now.

1:29.0

I started studying neuroscience and graduate school, FMRI research, specifically trying to understand how the brain processes images

1:31.1

and words and emotions.

1:33.8

And I found that

1:35.4

really interesting, but I

1:37.1

realized I was more interested in broader questions

1:39.3

of how do

1:41.2

beliefs form and how do people process

1:43.3

information and how do social factors influence information, how do beliefs form and how do people process information and how do social factors influence

1:46.2

information how do two people read the same thing and come to very different conclusions so i was

1:53.5

able to change majors in graduate school and study social psychology sociology and understand how to study those types of questions

...

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