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Luke Guerdan

@lukeguerdan.bsky.social
105 followers 40 following 32 posts

PhD student @ Carnegie Mellon University I design tools and processes to support principled evaluation of AI systems. lukeguerdan.com

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Luke Guerdan @lukeguerdan.bsky.social · 09/12/2025
LLM-as-a-judge systems are often used for subjective rating tasks where humans can reasonably disagree on which rating is "correct." But how should we validate a judge system produces trustworthy ratings when humans themselves can disagree? 🧵 Paper: arxiv.org/pdf/2503.05965
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Luke Guerdan @lukeguerdan.bsky.social · 14/10/2025
A subtle aspect of predictive modeling is target variable construction: the process of translating a latent, unobservable concept like "healthcare need" into a prediction target But how does target variable construction unfold in practice, and how can we better support it going forward? #CSCW2025 🧵
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Reposted by Luke Guerdan
Cella @cellllla.bsky.social · 09/10/2025
✨I’m on the academic job market ✨ I’m a PhD candidate at @hcii.cmu.edu studying tech, labor, and resistance 👩🏻‍💻💪🏽💥 I research how workers and communities contest harmful sociotechnical systems and shape alternative futures through everyday resistance and collective action More info: cella.io
cella.io
Cella M. Sum –
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Reposted by Luke Guerdan
Cella @cellllla.bsky.social · 28/08/2025
What can #CSCW learn from tech workers who have been involved in collective action and unionization about how to make transformative change within our field? My new #CSCW2025 paper with Mona Wang, Anna Konvicka, and Sarah Fox seeks to answer this question. Pre-print: arxiv.org/pdf/2508.12579
Screenshot of the CSCW 2025 paper "The Future of Tech Labor: How Workers are Organizing and Transforming the Computing Industry" 

CELLA M. SUM, Carnegie Mellon University, USA
ANNA KONVICKA, Princeton University, USA
MONA WANG, Princeton University, USA
SARAH E. FOX, Carnegie Mellon University, USA

Abstract: The tech industry’s shifting landscape and the growing precarity of its labor force have spurred unionization efforts among tech workers. These workers turn to collective action to improve their working conditions and to protest unethical practices within their workplaces. To better understand this movement, we interviewed 44 U.S.-based tech worker-organizers to examine their motivations, strategies, challenges, and future visions for labor organizing. These workers included engineers, product managers, customer support specialists, QA analysts, logistics workers, gig workers, and union staff organizers. Our findings reveal that, contrary to popular narratives of prestige and privilege within the tech industry, tech workers face fragmented and unstable work environments which contribute to their disempowerment and hinder their organizing efforts. Despite these difficulties, organizers are laying the groundwork for a more resilient tech worker movement through community building and expanding political consciousness. By situating these dynamics within broader structural and ideological forces, we identify ways for the CSCW community to build solidarity with
tech workers who are materially transforming our field through their organizing efforts.
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Luke Guerdan @lukeguerdan.bsky.social · 19/08/2025
Have you built a generative AI evaluation that uses an LLM-as-a-judge and a rubric to rate model outputs? Sign up for a 45-minute Zoom session to provide feedback on a new tool for building trustworthy evals. Learn more at tinyurl.com/llm-as-a-judge - receive $35 for participating in a session!
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