Chris Arnold

@chrisarnold@sigmoid.social
119 Followers
222 Following
52 Posts
Associate Professor in Government and AI at the University of Birmingham. Data addict. Visualisation enthusiast. I ♥ institutions.
The Centre for AI in Government is at #APSA25 for the first time. Really impressive line-up and testament of a strong group of curious, committed and kind scholars. Come and find us! #sciencerocks #computationalsocialscience #AI #Government
40110 #AI and #GlobalChallenges & 40111 #AI for #Government and #Policy is a wrap! From designing research to deploying ML solutions on ‘people data’—we covered it. Rewarding but challenging, given the cohort’s diversity & the material’s breadth. Wanna join the next round? Apply! Questions on how? PM!
On Friday, I’m presenting at TCD (w/ Andreas Küpfer). We explore how to measure object prominence in news photography & curated images.
Applications:
📌 US newspaper ideal points (Visual BoW);
📌 Gender bias in US campaign videos.
More info & enrolment: 🔗 https://www.tcd.ie/Political_Science/news&events/events/friday-seminar-series/
Friday Seminar Series - Political Science - Trinity College Dublin

What started as a political science project with Slava Jankin and Hannah Béchara spiraled into its own paper, exploring how language shapes how we perceive distances & construe events. Excited to share the journey! #sciencerocks

Arnold, C., Béchara, H., & Jankin, S. (2024). Perceiving Distances and Construing Targets Based on Communication. Social Cognition, 42(5), 355-375.

Read it all here:
https://guilfordjournals.com/doi/10.1521/soco.2024.42.5.355

Kick off for our DFG project! With multimodal machine learning, we will study 15,000h of parliamentary speeches in Germany's federal and state level parliaments. Stay tuned for new findings on how MPs handle populism, how facial expressions give away coalition preferences and the dyamics of salience. #DreamTeam #ScienceRocks #DankeDFG
📢 Publicationalert: "The Role of Hyperparameters in Machine Learning Models and How to Tune Them" with with Luka Biedebach Andreas Küpfer and Marcel Neunhoeffer in Political Science Research and Methods. Margeret is loving #hyperparameters. Do you? #sciencerocks #machinelearning #socialdatascience https://doi.org/10.1017/psrm.2023.61 🧵 [1/5]
The role of hyperparameters in machine learning models and how to tune them | Political Science Research and Methods | Cambridge Core

The role of hyperparameters in machine learning models and how to tune them

Cambridge Core
Kickoff for our #LTAsummerinternship. Step 1: Daksh Dewgun is digitising all Welsh party manifestos since devolution. Here a 'hello world' from the convervative manifestos already in the books => groundwork for our larger project on Welsh manifestos & pledges.
New Workingpaper: "The Role of #Hyperparameters in #MachineLearning Models and How to Tune Them". We suggest: Handle HPs with the same loving care as parameter estimates---you could end up choosing the wrong model. https://tinyurl.com/mr2akrn3