Florian Valentin Wunderlich
Author directory2026
Is Visual Prompting All You Need? Studying VLM Spatial Reasoning under Progressive Visual Scaffolds
Lars Benedikt Kaesberg | Tianyu Yang | Florian Valentin Wunderlich | Terry Ruas | Daniel Kurzawe | Jan Philip Wahle | Bela Gipp
Findings of the Association for Computational Linguistics: EMNLP 2026
Lars Benedikt Kaesberg | Tianyu Yang | Florian Valentin Wunderlich | Terry Ruas | Daniel Kurzawe | Jan Philip Wahle | Bela Gipp
Findings of the Association for Computational Linguistics: EMNLP 2026
Vision-language models (VLMs) have advanced rapidly in multimodal reasoning, yet recent work shows that their failures often reflect an interaction between visual grounding and downstream reasoning. What remains less clear is how the visual presentation of a task shapes model performance and failure modes when the underlying reasoning problem is unchanged. We study this question in SPaRC, a benchmark for grid-based visual spatial planning, by introducing lightweight input-side scaffolds that preserve the visual modality while making spatial structure more accessible. The scaffolds are task-specific diagnostic interventions built on SPaRC’s known board structure, not a general-purpose prompting strategy. Across multiple VLMs, these scaffolds improve task accuracy over the original visual setting by up to 34.0 percentage points and further complement GRPO-based training, yielding up to 4.6 additional accuracy points compared with near-zero gains on the original visual input. Analyses on both end-to-end task solving and object detection show that these gains are closely tied to reductions in grounding-related errors, while rule reasoning remains comparatively challenging. With the planning problem held fixed, visual presentation therefore changes both accuracy and the distribution of failure modes, which in turn determines whether a VLM benchmark measures grounded perception, downstream reasoning, or a mixture of both.
Multi-Agent Reasoning Improves Compute Efficiency: Pareto-Optimal Test-Time Scaling
Florian Valentin Wunderlich | Lars Benedikt Kaesberg | Jan Philip Wahle | Terry Ruas | Bela Gipp
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 4: Student Research Workshop)
Florian Valentin Wunderlich | Lars Benedikt Kaesberg | Jan Philip Wahle | Terry Ruas | Bela Gipp
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 4: Student Research Workshop)
Advances in inference methods have enabled language models to improve their predictions without additional training. These methods often prioritize raw performance over cost-effective compute usage. However, computational efficiency is key for real-world applications with resource constraints. We provide a systematic analysis of the inference scaling strategies self-consistency, self-refinement, multi-agent debate, and mixture-of-agents, to study their computational performance tradeoffs. We evaluate methods on two reasoning benchmarks (MMLU-Pro, BBH) and include extensive parameter configurations (e.g., scaling the number of parallel predictions, agents, and debate rounds) across different model sizes. Across 34 configurations and over 100 evaluations, we compute the Pareto-optimal front to select methods that achieve the best accuracy with the lowest computational budget.Notably, inference scaling improves accuracy by up to +7.1% points over chain-of-thought at the highest evaluated budgets (20× the CoT compute budget) on MMLU-Pro. With an equal computing budget, debate and mixture-of-agents outperform self-consistency by 1.3% and 2.7% points, respectively. While self-consistency saturates earlier, multi-agent gains persist, particularly on more complicated tasks. We identify a simple multi-agent design guideline: mixture-of-agents is most efficient when the number of parallel generations exceeds the number of sequential aggregations.
2025
BRIGHTER: BRIdging the Gap in Human-Annotated Textual Emotion Recognition Datasets for 28 Languages
Shamsuddeen Hassan Muhammad | Nedjma Ousidhoum | Idris Abdulmumin | Jan Philip Wahle | Terry Ruas | Meriem Beloucif | Christine de Kock | Nirmal Surange | Daniela Teodorescu | Ibrahim Said Ahmad | David Ifeoluwa Adelani | Alham Fikri Aji | Felermino D. M. A. Ali | Ilseyar Alimova | Vladimir Araujo | Nikolay Babakov | Naomi Baes | Ana-Maria Bucur | Andiswa Bukula | Guanqun Cao | Rodrigo Tufiño | Rendi Chevi | Chiamaka Ijeoma Chukwuneke | Alexandra Ciobotaru | Daryna Dementieva | Murja Sani Gadanya | Robert Geislinger | Bela Gipp | Oumaima Hourrane | Oana Ignat | Falalu Ibrahim Lawan | Rooweither Mabuya | Rahmad Mahendra | Vukosi Marivate | Alexander Panchenko | Andrew Piper | Charles Henrique Porto Ferreira | Vitaly Protasov | Samuel Rutunda | Manish Shrivastava | Aura Cristina Udrea | Lilian Diana Awuor Wanzare | Sophie Wu | Florian Valentin Wunderlich | Hanif Muhammad Zhafran | Tianhui Zhang | Yi Zhou | Saif M. Mohammad
Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
Shamsuddeen Hassan Muhammad | Nedjma Ousidhoum | Idris Abdulmumin | Jan Philip Wahle | Terry Ruas | Meriem Beloucif | Christine de Kock | Nirmal Surange | Daniela Teodorescu | Ibrahim Said Ahmad | David Ifeoluwa Adelani | Alham Fikri Aji | Felermino D. M. A. Ali | Ilseyar Alimova | Vladimir Araujo | Nikolay Babakov | Naomi Baes | Ana-Maria Bucur | Andiswa Bukula | Guanqun Cao | Rodrigo Tufiño | Rendi Chevi | Chiamaka Ijeoma Chukwuneke | Alexandra Ciobotaru | Daryna Dementieva | Murja Sani Gadanya | Robert Geislinger | Bela Gipp | Oumaima Hourrane | Oana Ignat | Falalu Ibrahim Lawan | Rooweither Mabuya | Rahmad Mahendra | Vukosi Marivate | Alexander Panchenko | Andrew Piper | Charles Henrique Porto Ferreira | Vitaly Protasov | Samuel Rutunda | Manish Shrivastava | Aura Cristina Udrea | Lilian Diana Awuor Wanzare | Sophie Wu | Florian Valentin Wunderlich | Hanif Muhammad Zhafran | Tianhui Zhang | Yi Zhou | Saif M. Mohammad
Proceedings of the 63rd Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)
People worldwide use language in subtle and complex ways to express emotions. Although emotion recognition–an umbrella term for several NLP tasks–impacts various applications within NLP and beyond, most work in this area has focused on high-resource languages. This has led to significant disparities in research efforts and proposed solutions, particularly for under-resourced languages, which often lack high-quality annotated datasets.In this paper, we present BRIGHTER–a collection of multi-labeled, emotion-annotated datasets in 28 different languages and across several domains. BRIGHTER primarily covers low-resource languages from Africa, Asia, Eastern Europe, and Latin America, with instances labeled by fluent speakers. We highlight the challenges related to the data collection and annotation processes, and then report experimental results for monolingual and crosslingual multi-label emotion identification, as well as emotion intensity recognition. We analyse the variability in performance across languages and text domains, both with and without the use of LLMs, and show that the BRIGHTER datasets represent a meaningful step towards addressing the gap in text-based emotion recognition.
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Co-authors
- Bela Gipp 3
- Terry Ruas 3
- Jan Philip Wahle 3
- Lars Benedikt Kaesberg 2
- Idris Abdulmumin 1
- David Ifeoluwa Adelani 1
- Ibrahim Said Ahmad 1
- Alham Fikri Aji 1
- Felermino D. M. A. Ali 1
- Ilseyar Alimova 1
- Vladimir Araujo 1
- Nikolay Babakov 1
- Naomi Baes 1
- Meriem Beloucif 1
- Ana-Maria Bucur 1
- Andiswa Bukula 1
- Guanqun Cao 1
- Rendi Chevi 1
- Chiamaka Ijeoma Chukwuneke 1
- Alexandra Ciobotaru 1
- Daryna Dementieva 1
- Charles Henrique Porto Ferreira 1
- Murja Sani Gadanya 1
- Robert Geislinger 1
- Oumaima Hourrane 1
- Oana Ignat 1
- Daniel Kurzawe 1
- Falalu Ibrahim Lawan 1
- Rooweither Mabuya 1
- Rahmad Mahendra 1
- Vukosi Marivate 1
- Saif Mohammad 1
- Shamsuddeen Hassan Muhammad 1
- Nedjma Ousidhoum 1
- Alexander Panchenko 1
- Andrew Piper 1
- Vitaly Protasov 1
- Samuel Rutunda 1
- Manish Shrivastava 1
- Nirmal Surange 1
- Daniela Teodorescu 1
- Rodrigo Tufiño 1
- Aura Cristina Udrea 1
- Lilian Diana Awuor Wanzare 1
- Sophie Wu 1
- Tianyu Yang 1
- Hanif Muhammad Zhafran 1
- Tianhui Zhang 1
- Yi Zhou 1
- Christine de Kock 1