Manoel Horta Ribeiro

@manoelhortaribeiro.bsky.social

Assistant Professor @ Princeton Previously: EPFL 🇨🇭, UFMG 🇧🇷 Interests: Computational Social Science, Platforms, GenAI, Moderation

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(feel free to complain to me to) And for the #IC2S2 crowd, I'll also point to the work of the Coalition of Independent Technology Research in helping protect CSS research & researchers, and encourage you to join the organization. independenttechresearch.org

Home - Coalition for Independent Technology Research

independenttechresearch.org

J. Nathan Matias@natematias.bsky.social · last wk.

I hope folks have a great time at #ic2s2 this week! So say hi to @davidlazer.bsky.social if you're interested in thinking about how to make computational social science more repeatable, and feel free to complain to me about any errors in our work: citizensandtech.org/2026/07/comm...

Attending #IC2S2!! Will be co-organizing a tutorial on Simulating Human Survey Responses with Large Language Models, today at 1.15PM, and presenting on Friday in the Understanding Large Language Models session, 10.45AM. Looking forward to catching up with old friends and meeting new ones!!

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❓❓Should LLMs have access to ACM’s Digital Library❓❓ I wrote a short essay arguing that "yes!" I try to argue that, even if you are concerned about their negative impact on science, denying them access is a poor way to address their harm! doomscrollingbabel.manoel.xyz/p/science-sh...

Science Should Be Open, For LLMs Too

Even if you think LLMs are bad for science, you should let them have access to research papers

doomscrollingbabel.manoel.xyz

Not a lot of info here about what kinds of agreements, with whom, and finances. But another example of data opening up for “AI” that wasn’t open for researchers. I fought many data wrangling battles at Semantic Scholar over missing ACM data. All research papers should be open access!

Association for Computing Machinery@acm.org · 3w ago

We are opening a consultation on the inclusion of ACM publications within AI licensing agreements for access and training purposes. We have published this piece as to why we believe it is the right time now to enter into these discussions. buff.ly/VTatuda

Just back from vacation, and very hyped for today's Brazil vs. Japan game. As a Brazilian, one of the most endearing things is seeing other countries (esp. other developing ones) show affection for our team! We don't deserve you all! Below is the least I expect from today's game :-)

New work from my lab! @teagrjohnson.bsky.social built a 12-dimensional narrative framework, annotated Dolma (no small feat given its extreme diversity), and analyzed narrative features across pretraining subsections. Highlight: pretraining data space displays strong narrative organization!

Figure 1: A web passage scored across our 12 narrative dimensions. Agency and setting dimensions are rated on a 1–5 Likert scale, temporal sequencing and causal density are passage-level proportions (0–1), and event density is the rate of event triggers per token. This passage scores high on agency and event features but low on setting, a “narrative profile” commonly seen across first-person web narratives.Figure 6: UMAP reduction of SBERT embeddings for 20,000 randomly sampled NARRADOLMA documents, colored by PC1 score (interiority). Labels are based on manual examination. Overlays for all three PCs appear in Fig. A5.
Teagan Johnson@teagrjohnson.bsky.social · 2mo ago

1/ LLMs learn narrative from their pretraining data but what narrative content is actually in there? It turns out narrative is wildly unevenly distributed across sources and topics. New preprint with @andrewpiper.bsky.social @elliottash.bsky.social @mariaa.bsky.social:

This image depicts the proportion of each Dolma category in the top quartile for the first three principal components.

Social media is no longer social. Most of it is passive viewing of videos and pictures from people we've never met. But we're still studying social media like it's 2010. We've entered the post-social media era — and research needs to catch up. osf.io/preprints/so... preprint w/ Richard Rogers

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Three things said about AI and social science: it's a topic to study, a thing to critique, a tool to use. My new Daedalus essay argues these aren't three conversations; they're one. A 🧵 on "Field Theory: AI as Social Science Question, Object, and Tool." www.amacad.org/publication/...

Field Theory: AI as Social Science Question, Object & Tool

Uses of advanced artificial intelligence are changing how societies organize labor, govern, produce knowledge, and make meaning. In light of these developments, this essay argues that AI models, tools...

amacad.org

My new post discusses the probable future of AI-assisted shopping! Drawing on our recent paper, I argue that if LLMs become the interface through which we search, compare, and buy things, we need a much sharper line between advertising and advice! doomscrollingbabel.manoel.xyz/p/when-the-a...

When the AI Assistant Becomes the Ad

This post describes our recent paper: Commercial Persuasion in AI-Mediated Conversations

doomscrollingbabel.manoel.xyz