Michael Bernstein

Michael Bernstein

@mbernst.bsky.social

CS Professor at Stanford

3.3K followers298 following54 posts

Empirical evidence that people can build highly predictive mental models of even complex AIs, if and only if the algorithm fulfills three criteria:

Lindsay Popowski@popowski.bsky.social

Is the only way we can create algorithms that people understand to make them trivially simple? We argue, no. People can predict the behavior of algorithms that are arbitrarily complex, if and only if they are available, compact and aligned. arxiv.org/abs/2601.18966

CSCW folks, I wanted to highlight how excited and proud I am to see work from our community (dl.acm.org/doi/10.1145/..., CSCW '24 best paper winner led by @jiachenyan.bsky.social and @mlam.bsky.social) grow and expand ambition into this Science paper. CSCW has a ton to offer the world.

Michael Bernstein@mbernst.bsky.social

Our new article in @science.org enables social media reranking outside of platforms' walled gardens. We add an LLM-powered reranking of highly polarizing political content into N=1256 participants' feeds. Downranking cools tensions with the opposite party—but upranking inflames them.

Michael Bernstein reposted

This was such a cool experiment that I created a Zentropi labeler with a simplified version of the authors' Partisan Animosity criteria. Now anyone can experiment directly with using this labeler to try to reduce the temperature of affective polarization in their feeds. zentropi.ai/labelers/b30...

science.orgReranking partisan animosity in algorithmic social media feeds alters affective polarizationToday, social media platforms hold the sole power to study the effects of feed-ranking algorithms. We developed a platform-independent method that reranks participants’ feeds in real time and used thi...
Michael Bernstein@mbernst.bsky.social

Our new article in @science.org enables social media reranking outside of platforms' walled gardens. We add an LLM-powered reranking of highly polarizing political content into N=1256 participants' feeds. Downranking cools tensions with the opposite party—but upranking inflames them.

Michael Bernstein reposted

New paper in Science: In a platform-independent field experiment, we show that reranking content expressing antidemocratic attitudes and partisan animosity in social media feeds alters affective polarization. 🧵

Our new article in @science.org enables social media reranking outside of platforms' walled gardens. We add an LLM-powered reranking of highly polarizing political content into N=1256 participants' feeds. Downranking cools tensions with the opposite party—but upranking inflames them.

Michael Bernstein reposted

Michael Bernstein reposted

🚨New WP!🚨 Structured AI Dialogues Can Increase Happiness and Meaning in Life In a preregistered RCT, four psychology-grounded #AI chatbots improved well-being across several outcomes. Co-authors: Jonas Schoene, Johannes Eichstaedt, Aadesh Salecha, Sonja Lyubomirsky 🧵👇

Michael Bernstein reposted

Thrilled to share that I’ve successfully defended my PhD dissertation and I will be joining MIT as an Assistant Professor starting Fall 2026, with a shared appointment between Sloan and EECS! I will be recruiting 1-2 PhD students this upcoming cycle. Consider applying to MIT EECS!

Michael Bernstein reposted

Very cool to see this research developed into a policy brief! Impactful work from a superstar team: @joon-s-pk.bsky.social @cqzou.bsky.social ‬ @aaronshaw.bsky.social @mako.cc Carrie Cai, Meredith Ringel Morris, @robbwiller.bsky.social Percy Liang, @mbernst.bsky.social

Stanford HAI@stanfordhai.bsky.social

AI agents that can simulate human behaviors and attitudes can help test ideas in social science. Our latest brief introduces a generative AI agent architecture that simulates the attitudes of 1,000+ real people. Read more: hai.stanford.edu/policy/simul...

Michael Bernstein reposted

Take a 👀 at this policy brief from @stanfordhai.bsky.social on how AI agents can test ideas in social science. Honored to be part of this amazing team: @joon-s-pk.bsky.social @cqzou.bsky.social @aaronshaw.bsky.social @mako.cc Carrie Cai, Meredith Ringel Morris, Percy Liang, @mbernst.bsky.social

Stanford HAI@stanfordhai.bsky.social

AI agents that can simulate human behaviors and attitudes can help test ideas in social science. Our latest brief introduces a generative AI agent architecture that simulates the attitudes of 1,000+ real people. Read more: hai.stanford.edu/policy/simul...

Michael Bernstein reposted

A policy brief on what generative AI simulations of people might be good for! (based on work with the amazing team of @joon-s-pk.bsky.social @cqzou.bsky.social @mako.cc @robbwiller.bsky.social @mbernst.bsky.social Merrie Morris, Carrie Cai, and Percy Liang)

Stanford HAI@stanfordhai.bsky.social

AI agents that can simulate human behaviors and attitudes can help test ideas in social science. Our latest brief introduces a generative AI agent architecture that simulates the attitudes of 1,000+ real people. Read more: hai.stanford.edu/policy/simul...

Michael Bernstein reposted

Should we use LLMs 🤖 to simulate human research subjects 🧑? In our new preprint, we argue sims can augment human studies to scale up social science as AI technology accelerates. We identify 5 tractable challenges and argue this is a promising and underused research method 🧪🧵 arxiv.org/abs/2504.02234

arxiv.orgLLM Social Simulations Are a Promising Research MethodAccurate and verifiable large language model (LLM) simulations of human research subjects promise an accessible data source for understanding human behavior and training new AI systems. However, resul...

Michael Bernstein reposted

This might be the most useful thing I have come across in social media - a personalized feed of academic papers filtered by your follower network! Highly recommend. #academicsky

Nikhil Garg@nkgarg.bsky.social

*Please repost* @sjgreenwood.bsky.social and I just launched a new personalized feed (*please pin*) that we hope will become a "must use" for #academicsky. The feed shows posts about papers filtered by *your* follower network. It's become my default Bluesky experience bsky.app/profile/pape...

Book announcement: with Melissa Valentine, we are publishing "Flash Teams: Leading the Future of AI-Enhanced, On-Demand Work." It's a leadership book synthesizing a decade of Stanford research on how computing, online platforms, and AI reshape teamwork. Coming October from @mitpress.bsky.social!

Michael Bernstein reposted

It was great to see so many attendees at the seminar from Michael Bernstein on Friday. Thanks for visiting, @mbernst.bsky.social. The recording of "Generative Agents: Interactive Simulacra of Human Behavior" is available at the web page below. @kenholstein.bsky.social @bradamyers.bsky.social

Our next #HCIISeminarSeries talk & Sujeath Pareddy Memorial Lecture will be Michael Bernstein @mbernst.bsky.social of Stanford University. 🎙️"Generative Agents: Interactive Simulacra of Human Behavior" 📅 Feb. 28, 2025 🕜1:30pm ET 📍NSH 1305 + livestream 🔗 Details: hcii.cmu.edu/news/event/2...

Michael Bernstein reposted

Weiser (2025)—Sal awakens: she smells coffee. A few minutes ago her alarm clock had quietly asked "coffee?", and she had mumbled "OK." Her Alexa alarm clock did its best with the mumbled response: "Playing OK Go." Sal cried out: "Alexa, stop!" The assistant leered at her. "Alexa. Alexa! ALEXA!"

The move to use LLMs to enforce platform codes of conduct is going to expose all the intentional vagueness in the policies. LLMs can certainly enforce what is written in the policies, but I bet it’s going to yield a bunch of undesired changes to enforcement patterns.

Applications to the Stanford Symbolic Systems lecturer position is due on the 15th. If you're interested in teaching and mentoring careers in academia, consider applying!

Michael Bernstein reposted

Most popular emoji used on all of Bluesky 😭

Tiziano Piccardi@tiziano.bsky.social

Weekend exercise: testing the Bluesky firehose. Who doesn't need a real-time dashboard to track EVERY emoji in messages? 😭, 😂, 🤣, ❤️ are topping the leaderboard! feeds.feedwizard.org (counters just started)

Michael Bernstein reposted

The question of whether to boot Singal is one of what will be an increasingly large number of decisions that Bluesky as an organization really does not want to make. It's important to remember that Bluesky was created with an ethos directly opposed to central authority making these decisions.

Bluesky Safety@safety.bsky.app

Moderation decisions draw intense public scrutiny from many places. That’s why Bluesky's architecture is designed to enable communities to control their online spaces, independent of the company or its leadership. We will continue to work on empowering people with more control over their experience.

A great class concept with a website so funky that the Fresh Prince himself would probably enroll

Ken Holstein@kenholstein.bsky.social

Wrapped up the first offering of a new course @cmuhcii.bsky.social this week: Augmenting Intelligence coaugmentation.com This was *such* a blast to teach! At our course exhibition on Wednesday, students presented posters, interactive demos, and art pieces around cognitive augmentation for...

Realtime LLM social media reranking enables field experiments demonstrating how we can depolarize. Congratulations @tiziano.bsky.social, @msaveski.bsky.social, and @jiachenyan.bsky.social!

Tiziano Piccardi@tiziano.bsky.social

New paper: Do social media algorithms shape affective polarization? We ran a field experiment on X/Twitter (N=1,256) using LLMs to rerank content in real-time, adjusting exposure to polarizing posts. Result: Algorithmic ranking impacts feelings toward the political outgroup! 🧵⬇️

Michael Bernstein reposted

New paper: Do social media algorithms shape affective polarization? We ran a field experiment on X/Twitter (N=1,256) using LLMs to rerank content in real-time, adjusting exposure to polarizing posts. Result: Algorithmic ranking impacts feelings toward the political outgroup! 🧵⬇️

Michael Bernstein reposted

Last week at CSCW, Catherine Han presented our work on journalists' unmet needs for protecting against harassment online. While the work targeted Twitter/X, it surfaces several nuances in users' needs that span future platforms as well (e.g., not wanting to filter out threats or visibly block users)

zakird.comzakird.com

Tiziano has a technical talent that has enabled him to go after incredibly ambitious computational social science projects. Keep an eye out for one of them coming soon!

Tiziano Piccardi@tiziano.bsky.social

Academic job market post! 👀 I’m a CS Postdoc at Stanford in the Stanford HCI group. I develop ways to improve the online information ecosystem by designing better social media feeds & improving Wikipedia. I work on AI, Social Computing, and HCI. piccardi.me 🧵

This paper argues that online spaces become ghost towns because it's too easy to lurk without contributing, and that asking people to regularly re-commit—or the incoming messages start getting muted—reverses the trend. arxiv.org/abs/2410.23267 It works! #cscw2024 paper by @popowski.bsky.social .

arxiv.orgCommit: Online Groups with Participation CommitmentsIn spite of efforts to increase participation, many online groups struggle to survive past the initial days, as members leave and activity atrophies. We argue that a main assumption of online group de...