Hi! I‘m Katerina Batziakoudi

Data Visualization Researcher

I’m currently based in Paris, doing an industrial PhD in Data Visualization with the AVIZ team at Inria and Berger-Levrault, supervised by Jean-Daniel Fekete.

I hold a double Master’s degree in Human-Computer Interaction and Design from KTH Royal Institute of Technology and Université Paris-Saclay . Before that, I studied Management Science and Technology at the Athens University of Economics and Business .

My PhD focuses on developing novel visualizations for values that span multiple orders of magnitude—from thousands to millions and billions—as commonly found in national budgets and environmental reports. I’m particularly interested in applying insights from cognitive psychology and behavioral economics to create visualizations that better align with how people perceive and contextualize numbers, making complex quantitative information more meaningful and accessible to a broad audience, including less numerate individuals.

News

June 2025

🧠 I presented our work on "Challenging the Dominance of Logarithmic Scales: Toward Cognitively Informed Bar Charts for Orders of Magnitude Values" at Journée Visu, in Reims, France.

April 2025

🎤 I presented our full paper "Lost in Magnitudes: Exploring Visualization Designs for Large Value Ranges" at CHI 2025 in Yokohoma, Japan. 🏆The paper received a Best Paper Award.

October 2024

🌱 I presented our position paper "Designing Visualizations for Enhancing Carbon Numeracy" at the Visualization Workshop for Climate Action and Sustainability at IEEE VIS 2024.

May 2024

🙋🏻‍♀️ I presented our poster "A Design Space for Static Visualizations with Several Orders of Magnitude" at Eurovis 2024 in Odense, Denmark. I also served as a Student Volunteer during the conference.

March 2023

🔍 I started my PhD focusing on the visualizations of public financial data in the AVIZ team of Inria and Berger-Levrault, under the supervision of Jean-Daniel Fekete.


Featured Publications

Lost in Magnitudes: Exploring Visualization Designs for Large Value Ranges
Katerina Batziakoudi, Florent Cabric, Stéphanie Rey, Jean-Daniel Fekete
CHI 2025 - Full Paper - Best Paper Award (top 1%)
PreprintOSFDOI
Designing Visualizations for Enhancing Carbon Numeracy
Katerina Batziakoudi, Florent Cabric, Stéphanie Rey, Jean-Daniel Fekete
IEEE VIS 2024 - Workshop Visualization for Climate Action and Sustainability
Preprint
Surprise! The effect of unexpected recommendations on trust towards AI-assisted decision making
Katerina Batziakoudi, Oleksandra Vereschak, Baptiste Caramiaux, Gilles Bailly
Master Thesis - Université Paris Saclay, 2023
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