Nils Feldhus
@nfel.bsky.social
Post-doctoral Researcher at BIFOLD / TU Berlin interested in interpretability and analysis of language models. Guest researcher at DFKI Berlin. https://nfelnlp.github.io/
One to go! Thanks to everyone who agreed to review so far! 🫶
If you have the capacity for one emergency review on explainability of NLP models, please reach out via DMs/chat or by replying here. #ACL2026NLP
bsky.app/profile/nfel...
If you have the capacity for one emergency review on explainability of NLP models, please reach out via DMs/chat or by replying here. #ACL2026NLP
bsky.app/profile/nfel...
Looking for emergency reviewers for ARR Special Track "Explainability of NLP Models". Topics: Faithfulness, mechanistic interpretability, surveys and position papers. Deadline Feb 14 AoE. #ACL2026NLP
February 12, 2026 at 7:33 AM
One to go! Thanks to everyone who agreed to review so far! 🫶
If you have the capacity for one emergency review on explainability of NLP models, please reach out via DMs/chat or by replying here. #ACL2026NLP
bsky.app/profile/nfel...
If you have the capacity for one emergency review on explainability of NLP models, please reach out via DMs/chat or by replying here. #ACL2026NLP
bsky.app/profile/nfel...
Reposted by Nils Feldhus
Hello #NLProc #ACL2026NLP community, I'm looking for an emergency reviewer for an ARR submission on LLM interpretability.
If you're available to complete a review before Feb 15, please reply or DM 🙏
If you're available to complete a review before Feb 15, please reply or DM 🙏
February 10, 2026 at 2:41 PM
Hello #NLProc #ACL2026NLP community, I'm looking for an emergency reviewer for an ARR submission on LLM interpretability.
If you're available to complete a review before Feb 15, please reply or DM 🙏
If you're available to complete a review before Feb 15, please reply or DM 🙏
Reposted by Nils Feldhus
Hello #NLProc #ACL2026NLP people. I am looking for **two emergency reviewers** in the Safety and Alignment in LLMs track for ACL/ARR.
Reviews are due Feb 15th. Please DM if interested and available.
Happy to offer drinks/food if you live in/pass by Lisbon ☀️
Reviews are due Feb 15th. Please DM if interested and available.
Happy to offer drinks/food if you live in/pass by Lisbon ☀️
February 10, 2026 at 2:59 PM
Hello #NLProc #ACL2026NLP people. I am looking for **two emergency reviewers** in the Safety and Alignment in LLMs track for ACL/ARR.
Reviews are due Feb 15th. Please DM if interested and available.
Happy to offer drinks/food if you live in/pass by Lisbon ☀️
Reviews are due Feb 15th. Please DM if interested and available.
Happy to offer drinks/food if you live in/pass by Lisbon ☀️
Reposted by Nils Feldhus
I'm looking for two emergency reviewers 🧑🚒👩🚒 for the ARR January Generalizability and Transfer track.
Please reach out if you have time & qualify for review or RT for visibility🙏🙏
Please reach out if you have time & qualify for review or RT for visibility🙏🙏
February 10, 2026 at 11:43 AM
I'm looking for two emergency reviewers 🧑🚒👩🚒 for the ARR January Generalizability and Transfer track.
Please reach out if you have time & qualify for review or RT for visibility🙏🙏
Please reach out if you have time & qualify for review or RT for visibility🙏🙏
Reposted by Nils Feldhus
Seems to be a common situation for ACs this round, but I'm also looking for two emergency reviewers for the January #ARR Evaluation and Resources track. I'd appreciate any help (reposts, encouragement, black magic...)
February 10, 2026 at 11:15 AM
Seems to be a common situation for ACs this round, but I'm also looking for two emergency reviewers for the January #ARR Evaluation and Resources track. I'd appreciate any help (reposts, encouragement, black magic...)
Reposted by Nils Feldhus
I am looking for 2 emergency reviewers for the ARR Ethics, Bias & Fairness track. Please DM me if you are available 🙏
February 10, 2026 at 9:27 AM
I am looking for 2 emergency reviewers for the ARR Ethics, Bias & Fairness track. Please DM me if you are available 🙏
Looking for emergency reviewers for ARR Special Track "Explainability of NLP Models". Topics: Faithfulness, mechanistic interpretability, surveys and position papers. Deadline Feb 14 AoE. #ACL2026NLP
February 9, 2026 at 5:33 PM
Looking for emergency reviewers for ARR Special Track "Explainability of NLP Models". Topics: Faithfulness, mechanistic interpretability, surveys and position papers. Deadline Feb 14 AoE. #ACL2026NLP
It was a real pleasure to visit the Health NLP Lab in Tübingen and present my research at BIFOLD and TU Berlin in collaboration with Charité and University of Augsburg among others. We had some exciting discussions. Thanks for having me!
Last week, Dr. Nils Feldhus @nfel.bsky.social, postdoctoral researcher at @tuberlin.bsky.social and @bifold.berlin, visited our lab and presented his research during our weekly lab meeting.
January 21, 2026 at 2:42 PM
It was a real pleasure to visit the Health NLP Lab in Tübingen and present my research at BIFOLD and TU Berlin in collaboration with Charité and University of Augsburg among others. We had some exciting discussions. Thanks for having me!
Reposted by Nils Feldhus
Last week, Dr. Nils Feldhus @nfel.bsky.social, postdoctoral researcher at @tuberlin.bsky.social and @bifold.berlin, visited our lab and presented his research during our weekly lab meeting.
January 21, 2026 at 2:00 PM
Last week, Dr. Nils Feldhus @nfel.bsky.social, postdoctoral researcher at @tuberlin.bsky.social and @bifold.berlin, visited our lab and presented his research during our weekly lab meeting.
Sharing my favorite papers I read in 2025 from human-centric XAI, mechanistic interpretability, NLG evaluation, and related fields, covering conferences I've attended (ACL in Austria, EMNLP in China), but also journals, ML and HCI conferences:
nfelnlp.github.io/recommended/...
nfelnlp.github.io/recommended/...
January 2, 2026 at 9:16 AM
Sharing my favorite papers I read in 2025 from human-centric XAI, mechanistic interpretability, NLG evaluation, and related fields, covering conferences I've attended (ACL in Austria, EMNLP in China), but also journals, ML and HCI conferences:
nfelnlp.github.io/recommended/...
nfelnlp.github.io/recommended/...
Reposted by Nils Feldhus
I’m at #NeurIPS in San Diego this week! Come see our poster on feature interpretability. Find @eberleoliver.bsky.social and me at:
🪧Poster Session 1 @ Exhibit Hall C,D,E #1015
Wed 3 Dec, 11 am - 2 pm
🪧Poster @ Mech Interp Workshop
Upper Level Room 30A-E
Sun 7 Dec, 8 am - 5 pm
🪧Poster Session 1 @ Exhibit Hall C,D,E #1015
Wed 3 Dec, 11 am - 2 pm
🪧Poster @ Mech Interp Workshop
Upper Level Room 30A-E
Sun 7 Dec, 8 am - 5 pm
December 2, 2025 at 6:56 PM
I’m at #NeurIPS in San Diego this week! Come see our poster on feature interpretability. Find @eberleoliver.bsky.social and me at:
🪧Poster Session 1 @ Exhibit Hall C,D,E #1015
Wed 3 Dec, 11 am - 2 pm
🪧Poster @ Mech Interp Workshop
Upper Level Room 30A-E
Sun 7 Dec, 8 am - 5 pm
🪧Poster Session 1 @ Exhibit Hall C,D,E #1015
Wed 3 Dec, 11 am - 2 pm
🪧Poster @ Mech Interp Workshop
Upper Level Room 30A-E
Sun 7 Dec, 8 am - 5 pm
Reposted by Nils Feldhus
*Urgently* looking for emergency reviewers for the ARR October Interpretability track 🙏🙏
ReSkies much appreciated
ReSkies much appreciated
November 11, 2025 at 10:29 AM
*Urgently* looking for emergency reviewers for the ARR October Interpretability track 🙏🙏
ReSkies much appreciated
ReSkies much appreciated
Reposted by Nils Feldhus
Heading to the EMNLP BlackboxNLP Workshop this Sunday? Don’t miss @nfel.bsky.social and @lkopf.bsky.social poster on „Interpreting Language Models Through Concept Descriptions: A Survey“
aclanthology.org/2025.blackbo...
#EMNLP #BlackboxNLP #XAI #Interpretapility
aclanthology.org/2025.blackbo...
#EMNLP #BlackboxNLP #XAI #Interpretapility
Nov 9, @blackboxnlp.bsky.social , 11:00-12:00 @ Hall C – Interpreting Language Models Through Concept Descriptions: A Survey (Feldhus & Kopf) @lkopf.bsky.social
🗞️ aclanthology.org/2025.blackbo...
bsky.app/profile/nfel...
🗞️ aclanthology.org/2025.blackbo...
bsky.app/profile/nfel...
November 8, 2025 at 10:55 AM
Heading to the EMNLP BlackboxNLP Workshop this Sunday? Don’t miss @nfel.bsky.social and @lkopf.bsky.social poster on „Interpreting Language Models Through Concept Descriptions: A Survey“
aclanthology.org/2025.blackbo...
#EMNLP #BlackboxNLP #XAI #Interpretapility
aclanthology.org/2025.blackbo...
#EMNLP #BlackboxNLP #XAI #Interpretapility
I'm at #EMNLP2025 in Suzhou🇨🇳 to present these papers in the coming days:
Nov 7, Session 14, 12:30-13:30 @ Hall C – Multilingual Datasets for Custom Input Extraction and Explanation Requests Parsing in Conversational XAI Systems (Wang et al.) @qiaw99.bsky.social
🗞️ aclanthology.org/2025.finding...
Nov 7, Session 14, 12:30-13:30 @ Hall C – Multilingual Datasets for Custom Input Extraction and Explanation Requests Parsing in Conversational XAI Systems (Wang et al.) @qiaw99.bsky.social
🗞️ aclanthology.org/2025.finding...
November 6, 2025 at 7:00 AM
I'm at #EMNLP2025 in Suzhou🇨🇳 to present these papers in the coming days:
Nov 7, Session 14, 12:30-13:30 @ Hall C – Multilingual Datasets for Custom Input Extraction and Explanation Requests Parsing in Conversational XAI Systems (Wang et al.) @qiaw99.bsky.social
🗞️ aclanthology.org/2025.finding...
Nov 7, Session 14, 12:30-13:30 @ Hall C – Multilingual Datasets for Custom Input Extraction and Explanation Requests Parsing in Conversational XAI Systems (Wang et al.) @qiaw99.bsky.social
🗞️ aclanthology.org/2025.finding...
🔍 Are you curious about uncovering the underlying mechanisms and identifying the roles of model components (neurons, …) and abstractions (SAEs, …)?
We provide the first survey of concept description generation and evaluation methods.
Joint effort w/ @lkopf.bsky.social
📄 arxiv.org/abs/2510.01048
We provide the first survey of concept description generation and evaluation methods.
Joint effort w/ @lkopf.bsky.social
📄 arxiv.org/abs/2510.01048
October 2, 2025 at 9:13 AM
🔍 Are you curious about uncovering the underlying mechanisms and identifying the roles of model components (neurons, …) and abstractions (SAEs, …)?
We provide the first survey of concept description generation and evaluation methods.
Joint effort w/ @lkopf.bsky.social
📄 arxiv.org/abs/2510.01048
We provide the first survey of concept description generation and evaluation methods.
Joint effort w/ @lkopf.bsky.social
📄 arxiv.org/abs/2510.01048
Reposted by Nils Feldhus
Happy to share that our PRISM paper has been accepted at #NeurIPS2025 🎉
In this work, we introduce a multi-concept feature description framework that can identify and score polysemantic features.
📄 Paper: arxiv.org/abs/2506.15538
#NeurIPS #MechInterp #XAI
In this work, we introduce a multi-concept feature description framework that can identify and score polysemantic features.
📄 Paper: arxiv.org/abs/2506.15538
#NeurIPS #MechInterp #XAI
September 19, 2025 at 12:02 PM
Happy to share that our PRISM paper has been accepted at #NeurIPS2025 🎉
In this work, we introduce a multi-concept feature description framework that can identify and score polysemantic features.
📄 Paper: arxiv.org/abs/2506.15538
#NeurIPS #MechInterp #XAI
In this work, we introduce a multi-concept feature description framework that can identify and score polysemantic features.
📄 Paper: arxiv.org/abs/2506.15538
#NeurIPS #MechInterp #XAI
The submission deadline of the inaugural Young Researchers workshop at INLG 2025 has been extended by 5 days.
We're excited to receive your 2p position papers showcasing your NLG-related research until August 31, 2025! @siggen.bsky.social
ynlg-workshop.github.io
bsky.app/profile/nfel...
We're excited to receive your 2p position papers showcasing your NLG-related research until August 31, 2025! @siggen.bsky.social
ynlg-workshop.github.io
bsky.app/profile/nfel...
August 25, 2025 at 11:27 AM
The submission deadline of the inaugural Young Researchers workshop at INLG 2025 has been extended by 5 days.
We're excited to receive your 2p position papers showcasing your NLG-related research until August 31, 2025! @siggen.bsky.social
ynlg-workshop.github.io
bsky.app/profile/nfel...
We're excited to receive your 2p position papers showcasing your NLG-related research until August 31, 2025! @siggen.bsky.social
ynlg-workshop.github.io
bsky.app/profile/nfel...
Reposted by Nils Feldhus
Excited to announce the first-ever Workshop for Young Researchers in Natural Language Generation (YNLG), supported by @siggen.bsky.social, taking place on October 29, 2025 in Hanoi, Vietnam, co-located with INLG 2025.
Call for Submissions is out now!
ynlg-workshop.github.io
Call for Submissions is out now!
ynlg-workshop.github.io
August 12, 2025 at 7:05 AM
Excited to announce the first-ever Workshop for Young Researchers in Natural Language Generation (YNLG), supported by @siggen.bsky.social, taking place on October 29, 2025 in Hanoi, Vietnam, co-located with INLG 2025.
Call for Submissions is out now!
ynlg-workshop.github.io
Call for Submissions is out now!
ynlg-workshop.github.io
Excited to announce the first-ever Workshop for Young Researchers in Natural Language Generation (YNLG), supported by @siggen.bsky.social, taking place on October 29, 2025 in Hanoi, Vietnam, co-located with INLG 2025.
Call for Submissions is out now!
ynlg-workshop.github.io
Call for Submissions is out now!
ynlg-workshop.github.io
August 12, 2025 at 7:05 AM
Excited to announce the first-ever Workshop for Young Researchers in Natural Language Generation (YNLG), supported by @siggen.bsky.social, taking place on October 29, 2025 in Hanoi, Vietnam, co-located with INLG 2025.
Call for Submissions is out now!
ynlg-workshop.github.io
Call for Submissions is out now!
ynlg-workshop.github.io
Thoroughly enjoying the range of topics at the first #ACL2025NLP poster session!
Our FitCF poster presentation on counterfactual example generation at #ACL2025 has been moved to Tuesday, July 29, at 16:00-17:30.
bsky.app/profile/nfel...
Our FitCF poster presentation on counterfactual example generation at #ACL2025 has been moved to Tuesday, July 29, at 16:00-17:30.
bsky.app/profile/nfel...
Qianli Wang ( @qiaw99.bsky.social ) et al.:
"FitCF: A Framework for Automatic Feature Importance-guided Counterfactual Example Generation"
📄 ACL Anthology: aclanthology.org/2025.finding...
🏟️ ACL Findings, July 28 @ Hall 4/5
Poster presentation: 18:00-19:30 (pres. by Qianli and myself)
"FitCF: A Framework for Automatic Feature Importance-guided Counterfactual Example Generation"
📄 ACL Anthology: aclanthology.org/2025.finding...
🏟️ ACL Findings, July 28 @ Hall 4/5
Poster presentation: 18:00-19:30 (pres. by Qianli and myself)
FitCF: A Framework for Automatic Feature Importance-guided Counterfactual Example Generation
Qianli Wang, Nils Feldhus, Simon Ostermann, Luis Felipe Villa-Arenas, Sebastian Möller, Vera Schmitt. Findings of the Association for Computational Linguistics: ACL 2025. 2025.
aclanthology.org
July 28, 2025 at 10:12 AM
Thoroughly enjoying the range of topics at the first #ACL2025NLP poster session!
Our FitCF poster presentation on counterfactual example generation at #ACL2025 has been moved to Tuesday, July 29, at 16:00-17:30.
bsky.app/profile/nfel...
Our FitCF poster presentation on counterfactual example generation at #ACL2025 has been moved to Tuesday, July 29, at 16:00-17:30.
bsky.app/profile/nfel...
🚆On my way to Vienna! #ACL2025NLP #ACL2025
Together with my amazing colleagues from TU Berlin, DFKI, Saarland & Potsdam, I will present 4 papers on counterfactuals (Findings), free-text rationales (GEM), fact checking (FEVER oral), table understanding (TRL oral).
Excited to meet old and new friends!
Together with my amazing colleagues from TU Berlin, DFKI, Saarland & Potsdam, I will present 4 papers on counterfactuals (Findings), free-text rationales (GEM), fact checking (FEVER oral), table understanding (TRL oral).
Excited to meet old and new friends!
July 26, 2025 at 9:37 AM
🚆On my way to Vienna! #ACL2025NLP #ACL2025
Together with my amazing colleagues from TU Berlin, DFKI, Saarland & Potsdam, I will present 4 papers on counterfactuals (Findings), free-text rationales (GEM), fact checking (FEVER oral), table understanding (TRL oral).
Excited to meet old and new friends!
Together with my amazing colleagues from TU Berlin, DFKI, Saarland & Potsdam, I will present 4 papers on counterfactuals (Findings), free-text rationales (GEM), fact checking (FEVER oral), table understanding (TRL oral).
Excited to meet old and new friends!
Reposted by Nils Feldhus
Very happy to be at #FAccT2025 in Athens, where I presented our work "Gender Bias in Explainability: Investigating Performance Disparity in Post-hoc Methods"
📄Paper: dl.acm.org/doi/10.1145/...
At #FAccT2025? Let's connect if you're interested in improving the usability of explainability methods!
📄Paper: dl.acm.org/doi/10.1145/...
At #FAccT2025? Let's connect if you're interested in improving the usability of explainability methods!
June 26, 2025 at 5:25 AM
Very happy to be at #FAccT2025 in Athens, where I presented our work "Gender Bias in Explainability: Investigating Performance Disparity in Post-hoc Methods"
📄Paper: dl.acm.org/doi/10.1145/...
At #FAccT2025? Let's connect if you're interested in improving the usability of explainability methods!
📄Paper: dl.acm.org/doi/10.1145/...
At #FAccT2025? Let's connect if you're interested in improving the usability of explainability methods!
Glad to announce our #FAccT2025 paper about gender bias in feature attribution methods, led by Mahdi Dhaini, will be presented tomorrow in 🇬🇷 Athens as part of the "Evaluating Explainable AI" session from 10:45 AM to 12:15 PM in Amphitheatre Ioannis Despotopoulos: programs.sigchi.org/facct/2025/p...
June 23, 2025 at 12:05 PM
Glad to announce our #FAccT2025 paper about gender bias in feature attribution methods, led by Mahdi Dhaini, will be presented tomorrow in 🇬🇷 Athens as part of the "Evaluating Explainable AI" session from 10:45 AM to 12:15 PM in Amphitheatre Ioannis Despotopoulos: programs.sigchi.org/facct/2025/p...
Reposted by Nils Feldhus
🔍 When do neurons encode multiple concepts?
We introduce PRISM, a framework for extracting multi-concept feature descriptions to better understand polysemanticity.
📄 Capturing Polysemanticity with PRISM: A Multi-Concept Feature Description Framework
arxiv.org/abs/2506.15538
🧵 (1/7)
We introduce PRISM, a framework for extracting multi-concept feature descriptions to better understand polysemanticity.
📄 Capturing Polysemanticity with PRISM: A Multi-Concept Feature Description Framework
arxiv.org/abs/2506.15538
🧵 (1/7)
June 19, 2025 at 3:18 PM
🔍 When do neurons encode multiple concepts?
We introduce PRISM, a framework for extracting multi-concept feature descriptions to better understand polysemanticity.
📄 Capturing Polysemanticity with PRISM: A Multi-Concept Feature Description Framework
arxiv.org/abs/2506.15538
🧵 (1/7)
We introduce PRISM, a framework for extracting multi-concept feature descriptions to better understand polysemanticity.
📄 Capturing Polysemanticity with PRISM: A Multi-Concept Feature Description Framework
arxiv.org/abs/2506.15538
🧵 (1/7)
Successfully defended my PhD yesterday! 🎓 🎉
Special thanks to my mentor Sebastian Möller and professors Sina Zarrieß @clausebielefeld.bsky.social, Christin Seifert, and @matthiasboehm7.bsky.social for being part of my committee.
Will continue working on XAI & NLP as a post-doc at TU Berlin & BIFOLD
Special thanks to my mentor Sebastian Möller and professors Sina Zarrieß @clausebielefeld.bsky.social, Christin Seifert, and @matthiasboehm7.bsky.social for being part of my committee.
Will continue working on XAI & NLP as a post-doc at TU Berlin & BIFOLD
April 12, 2025 at 4:29 PM
Successfully defended my PhD yesterday! 🎓 🎉
Special thanks to my mentor Sebastian Möller and professors Sina Zarrieß @clausebielefeld.bsky.social, Christin Seifert, and @matthiasboehm7.bsky.social for being part of my committee.
Will continue working on XAI & NLP as a post-doc at TU Berlin & BIFOLD
Special thanks to my mentor Sebastian Möller and professors Sina Zarrieß @clausebielefeld.bsky.social, Christin Seifert, and @matthiasboehm7.bsky.social for being part of my committee.
Will continue working on XAI & NLP as a post-doc at TU Berlin & BIFOLD