Sign in

Matthew Facciani

@matthewfacciani.bsky.social
24K followers 1.5K following 2.9K posts

Social scientist @yalesph.bsky.social exploring how we form beliefs and make sense of health information in the age of AI. Author of Misguided. amzn.to/48zTs59 matthewfacciani.substack.com www.matthewfacciani.com

PostsRepliesMedia
Matthew Facciani @matthewfacciani.bsky.social · 07/10/2026
Open-source investigations can trace digital footprints, allowing journalists to expose AI-generated propaganda, coordinated networks, financial incentives, and the people behind these operations. misinforeview.hks.harvard.edu/article/turn...
misinforeview.hks.harvard.edu
Turning OSINV inside the machine: Open-source investigations and information disorder | HKS Misinformation Review
Open-source investigators and OSINV journalists have spent the last decade turning publicly available data into evidence of war crimes, environmental harms, and human rights abuses. More recently, the...
041
Matthew Facciani @matthewfacciani.bsky.social · 06/10/2026
A new study finds that young adults who actively post and react on social media are worse at spotting misinformation, while passive browsing is linked to better discernment. www.sciencedirect.com/science/arti...
sciencedirect.com
172
Matthew Facciani @matthewfacciani.bsky.social · 06/10/2026
Not signed up yet? You can still join and catch up on the videos. Next live Q&A is in 2 weeks!
011
Matthew Facciani @matthewfacciani.bsky.social · 06/10/2026
Trust in science hasn't collapsed, it has fractured. The good news is that people want experts to show up in their communities, and that's where trust gets built. Week 3 of my course is now live! matthewfacciani.substack.com/p/class-3-th...
matthewfacciani.substack.com
Class 3: The Social Psychology of Trust and Why We Believe Who We Believe
Welcome to Week 3 of my online course: Why People Believe Different Things and How to Talk to Them! This week we dive into trust, and how it shapes who we believe.
163
Matthew Facciani @matthewfacciani.bsky.social · 02/10/2026
Cutting that exposure by about 70% for three months during the 2020 election had no measurable effect on beliefs or attitudes, even among the heaviest consumers.
210
Matthew Facciani @matthewfacciani.bsky.social · 02/10/2026
Large Facebook & Instagram study finds that exposure to content from misinformation-prone sources was low for the typical user but heavily concentrated among a small group. www.science.org/doi/10.1126/...
science.org
Untrustworthy sources on Facebook and Instagram in 2020: Concentrated exposure but no attitudinal effects
Reducing exposure to untrustworthy sources on Facebook/Instagram had no measurable effects on attitudes, even for heavy consumers.
162
Matthew Facciani @matthewfacciani.bsky.social · 02/10/2026
Shaming individuals for a systemic-level problem is not an effective strategy.
040
Matthew Facciani @matthewfacciani.bsky.social · 01/10/2026
I’m going live on Substack today at 6 PM EST to talk about the social psychology of why we believe what we believe, and how our social connections shape trust. It’s the first live Q&A for my online class, but any paid newsletter subscriber is welcome to join. substack.com/@matthewfacc...
substack.com
Matthew Facciani, PhD | Substack
Social scientist exploring how we form beliefs and make sense of health information in the age of AI. Author of Misguided.
041
Matthew Facciani @matthewfacciani.bsky.social · 01/10/2026
Important reminder that if we want to build trust and communicate effectively about health, we need to be present where people are getting their information!
162
Matthew Facciani @matthewfacciani.bsky.social · 01/10/2026
I gave a talk at UW-Milwaukee’s School of Public Health today and asked the audience if they had heard of Dr. Mike. Almost every undergraduate raised their hand.
131
Matthew Facciani @matthewfacciani.bsky.social · 30/09/2026
It’s not only algorithms that favor outspoken political content. People also expect social media to be a place for stronger, more outspoken views, which can make nuanced perspectives seem less fitting. www.emerald.com/oir/article-...
emerald.com
The limits of nuance: how social media undermine nuanced political communication
Purpose. This study investigates how social media environments shape evaluations of political information, focusing on whether nuanced viewpoints are devalued relative to more outspoken, radical expre...
053
Matthew Facciani @matthewfacciani.bsky.social · 30/09/2026
New UK study finds that people had much more confidence in scientists in academia than in scientists working in government or in private companies. www.nature.com/articles/d41...
nature.com
People trust scientists seen to be ‘on their side’, UK study finds
Politics and personal values influence people’s confidence in scientists, according to a report.
090
Matthew Facciani @matthewfacciani.bsky.social · 30/09/2026
Jack Smith’s testimony was a major historic event, yet much of the attention on social media is going to Eric Schmidt’s epic Hawks vs. Hawkeyes blunder.
2216
Matthew Facciani @matthewfacciani.bsky.social · 30/09/2026
In studies from Turkey and South Korea, accuracy reminders and credible sources helped people respond to corrections, especially for scientific misinformation. However, these effects depended on how important the issue was to them. link.springer.com/article/10.1...
link.springer.com
Source credibility and issue type effects in misinformation correction in two non-western countries - Acta Politica
This paper investigates how individuals respond to corrective interventions based on accuracy nudges and source credibility cues, with a particular focus on how these effects vary across issue types a...
051
Matthew Facciani @matthewfacciani.bsky.social · 29/09/2026
Here is an online class that teaches you how to fact-check directly from fact-checking professionals! Six lessons and only $49. www.poynter.org/shop/fact-ch...
poynter.org
Fact-Checking for Everyone - Poynter
Learn fact-checking skills online with Poynter. Verify claims, evaluate sources and navigate misinformation and AI-generated content.
1103
Matthew Facciani @matthewfacciani.bsky.social · 28/09/2026
"Between 2020 and 2024, no cervical cancer deaths were recorded in women aged 20 to 24 - the first time that had happened over a five-year period."
062
Matthew Facciani @matthewfacciani.bsky.social · 28/09/2026
"The first study of its kind shows deaths have fallen sharply since school-age girls began being offered it in 2008, and around 200 lives have been saved in England so far thanks to the vaccine" www.bbc.com/news/article...
bbc.com
HPV vaccine means young women now have 'close to zero' risk of cervical cancer death
A new study finds that hundreds of lives have been saved since school-age girls were offered the HPV jab in 2008.
1266
Matthew Facciani @matthewfacciani.bsky.social · 28/09/2026
In early 2025, more Republicans identified primarily as Trump supporters than as Republicans (59% vs. 36%). Now, that has reversed, with 56% identifying primarily with the Republican Party and 34% with Trump. www.newsweek.com/donald-trump...
newsweek.com
Trump’s support suffers complete reversal with Republicans
Republicans now identify more with the GOP than Trump, a sharp reversal that could reshape the party’s midterm campaign strategy.
183
Matthew Facciani @matthewfacciani.bsky.social · 28/09/2026
New analysis of conservative influencer content reveals a sharp drop in Trump discussions, instead the content has often focused on James Talarico and the Lindsay Clancy trial. www.wsj.com/politics/ele...
wsj.com
MAGA Podcasters Are Tuning Out Trump. We Tracked What They Are Talking About Now.
The Wall Street Journal analyzed nearly 70,000 hours of podcasts, using a new AI tool, to find out why conservative creators appear to be losing interest in the president.
020
Matthew Facciani @matthewfacciani.bsky.social · 27/09/2026
New open-access book available that evaluates public health interventions from around the world! uclpress.co.uk/book/evaluat...
uclpress.co.uk
Evaluating Public Health Interventions
Public health interventions include any effort or policy that attempts to improve the health among individuals or an entire population. They can be run by governmental health departments or non-govern...
174
Matthew Facciani @matthewfacciani.bsky.social · 27/09/2026
Not signed up yet? You can still join and catch up on the videos. First live Q&A is this week!
010
Matthew Facciani @matthewfacciani.bsky.social · 27/09/2026
Also, having just one person in your close circle with a different political or religious view can meaningfully reduce your vulnerability to misinformation. Week 2 of my course is now live!
1140
Matthew Facciani @matthewfacciani.bsky.social · 27/09/2026
Why do smart people believe false things? A lot of it comes down to identity. When a belief is tied to who we are, we defend it even when the evidence says we shouldn't. matthewfacciani.substack.com/p/week-2-ide...
matthewfacciani.substack.com
Class 2: Identity, Belonging, and Belief
This week’s video dives into identity and belonging, and how these shape what we believe.
2225
Matthew Facciani @matthewfacciani.bsky.social · 26/09/2026
A four-wave study in Sweden found that conspiracy thinking, use of right-wing alternative media, and social media reinforce each other over time. In contrast, mainstream news use was associated with lower levels of conspiracy thinking. www.tandfonline.com/doi/full/10....
tandfonline.com
Breeding conspiracy thinking? Investigating the longitudinal relationship between media use and conspiracy mindset
Over the last decade, conspiracy theories and beliefs in them have become a more pressing social and political problem. Despite different media being the main channels through which conspiracy theo...
311564
Matthew Facciani @matthewfacciani.bsky.social · 25/09/2026
Before you reply to a comment on social media, ask yourself: Does this person seem genuinely open to a conversation and curious about other viewpoints, or are they simply venting and processing their feelings? You don’t need to waste your time when someone just wants to shout into the void.
1200
Matthew Facciani @matthewfacciani.bsky.social · 25/09/2026
Looking forward to giving this presentation next week! The title is “Trust Issues: Why We Believe What We Believe and What It Means for Public Health.” It's open to the public & freely available online. uwm.edu/publichealth...
uwm.edu
Zilber College Public Health Seminar - Trust Issues: Why We Believe What We Believe and What It Means for Public Health
Explore how trust shapes what we believe and what those beliefs mean for public health communication, policy and practice.
042
Matthew Facciani @matthewfacciani.bsky.social · 24/09/2026
If you're an expert who wants to reach more people online, you may not need a large social media following. You can reach many people indirectly by publishing op-eds and other credible work that AI systems can surface when people ask questions.
030
Matthew Facciani @matthewfacciani.bsky.social · 24/09/2026
As we enter an era when people increasingly turn to AI chatbots for advice, I think we may see a renewed value in publishing on credible websites and in established outlets, since these are the sources AI systems often draw on.
161
Matthew Facciani @matthewfacciani.bsky.social · 24/09/2026
Source: www.theguardian.com/us-news/2026...
theguardian.com
RFK Jr received $4m in book advances from Maha allies over past year
In 2024 ethics filing, US health secretary pledged to ‘not engage in writing, editing, marketing or promotional services for any of these books during government service’
031
Matthew Facciani @matthewfacciani.bsky.social · 24/09/2026
RFK Jr. received $4 million in book advances from MAHA allies over the past year, despite pledging in his 2024 ethics filing not to engage in writing, editing, marketing, or promotional services for any of these books while serving in government.
275
Matthew Facciani @matthewfacciani.bsky.social · 23/09/2026
That helps explain the opposition to data centers: concerns about AI aren't just about the technology itself, but who people think will benefit from it. www.pewresearch.org/global/2026/...
pewresearch.org
Globally, More People Expect AI to Cause Job Loss Than Growth
Amid a mix of concern and excitement about AI, a 37-country survey finds pessimism about its potential impact on jobs and economic inequality.
053
Matthew Facciani @matthewfacciani.bsky.social · 23/09/2026
New global polling finds that people are much more likely to say AI will increase than decrease the gap between the rich and poor. In the United States, 46% say AI will increase economic inequality, compared with just 5% who say it will decrease it.
3174
Matthew Facciani @matthewfacciani.bsky.social · 23/09/2026
"The study further reveals that social media literacy significantly influences students’ perceived competence in identifying deepfake videos and notes that education plays an important role in enhancing digital discernment." journals.plasu.edu.ng/index.php/pj...
journals.plasu.edu.ng
Perceived Influence of Social Media Literacy on Detecting Deepfake Content on TikTok Among Mass Communication Undergraduates in Kwara State | PLASU Journal of Communication Studies
030
Matthew Facciani @matthewfacciani.bsky.social · 22/09/2026
New interview with Dean Megan Ranney on the Edelman Trust survey! Really cool to be part of this project, and I’m looking forward to the future studies ahead. news.yale.edu/2026/09/17/t...
news.yale.edu
Trust and health: New report examines why patients don’t always follow doctors
A new report from Yale School of Public Health and the Edelman Trust Institute reveals the complex factors underlying how personal beliefs about health come to be.
1104
Matthew Facciani @matthewfacciani.bsky.social · 21/09/2026
New study suggests that teaching people to trust "reliable" outlets or distrust "unreliable" ones (e.g., NewsGuard-style tools) probably won't fix partisan misinformation belief, because people accept or reject claims based on whether the claims fit their politics, not based on who's reporting them.
researchgate.net
(PDF) A Signal Detection Analysis of Source Effects on Misinformation Susceptibility
PDF | Signal Detection Theory suggests that people may fall for misinformation because they are unable to discern true from false information (i.e., low... | Find, read and cite all the research you n...
0114
Matthew Facciani @matthewfacciani.bsky.social · 20/09/2026
My new online course, "Why People Believe Different Things and How to Talk to Them," is now live! It's a 6-week course with weekly videos and live Q&As. It's not too late to join! Lecture 1 here: matthewfacciani.substack.com/p/class-1-wh...
matthewfacciani.substack.com
Class 1: Why We Believe What We Believe
Introducing my new course and how identity and community shape what we believe
051
Reposted by Matthew Facciani
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
New analysis with the Edelman Trust Institute and my colleagues at Yale School of Public Health. Nearly 13,000 people across 13 countries, on how they decide what to believe about their health. Here's what we found! 🧵
144
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
Source: journals.sagepub.com/doi/epub/10....
011
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
A new study interviewed German science journalists and asked them how to cover uncertainty. They suggest that the best way to communicate scientific uncertainty is to be upfront about it early, clearly explain what we know and don’t know (and why), and acknowledge when new evidence changes the story
260
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
Read my summary of the report here: matthewfacciani.substack.com/p/what-cuts-...
matthewfacciani.substack.com
What Cuts Through the Noise: How We Decide What Health Information to Trust
New global data reveal how online communities, personal research, and AI are reshaping health decisions, and what healthcare providers can do differently.
050
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
One big takeaway: you can't fix this by being more credible or sharing more facts. Show up in people's communities, listen, and build the relationship before the doubt arrives.
120
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
The report closes with a case study. After the East Palestine derailment, a Yale researcher and a local activist went door to door together asking residents about their water quality. That partnership became part of a $10 million NIH-funded research program.
110
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
What helps once you're there isn't complicated. Listen first. Welcome doubts without judgment. Take people's concerns seriously. Having the right information isn't the only thing that matters.
120
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
These aren't people who turned away from institutions. They're open to institutional voices that show up where they already are.
100
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
The people who hold the most divisive health beliefs are also the most densely connected to each other. And they're the group most likely to say it would matter if their provider had a presence in their community.
100
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
AI is already part of that shift. Nearly half of people say someone with no medical training but good AI skills could match a doctor on at least one health task.
100
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
Trust in doctors hasn't dropped. What changed is how many sources people now draw from. AI, peers, online communities, all competing for the same attention. Doctors haven't lost their authority. Their voices are getting diluted.
110
Matthew Facciani @matthewfacciani.bsky.social · 17/09/2026
New analysis with the Edelman Trust Institute and my colleagues at Yale School of Public Health. Nearly 13,000 people across 13 countries, on how they decide what to believe about their health. Here's what we found! 🧵
144
Matthew Facciani @matthewfacciani.bsky.social · 15/09/2026
I'll be summarizing the key findings on my newsletter soon.
010
Matthew Facciani @matthewfacciani.bsky.social · 15/09/2026
For the past few months, I've been working with the Edelman Trust Institute and my colleagues at the Yale School of Public Health on new global trust survey. It's now available here! www.edelman.com/2026-edelman...
edelman.com
130