About Me

Hi there! I’m Onur Keleş, a PhD student in the Department of Linguistics at Boğaziçi University, Istanbul, and an IMPRS affiliate at the Max Planck Institute for Psycholinguistics, Nijmegen. I hold an M.A. (GPA: 4.0) and B.A. Summa Cum Laude (GPA: 4.0) from Boğaziçi University.

Sign Language Linguistics Multimodality & Iconicity Spatial Language Psycholinguistics Computational Linguistics Endangered Languages

My research sits at the intersection of cognitive science and NLP, investigating how visual-spatial modality shapes language in deaf signers, hearing gesture users, and vision–language models. I work with Dr. Kadir Gökgöz and Dr. Nazik Dinçtopal Deniz at Boğaziçi, and collaborate with Dr. Aslı Özyürek and Dr. Esam Ghaleb at MPI.


News

  • Apr 2026Paper accepted at ACL 2026 (Main): The Visual Iconicity Challenge — evaluating VLMs on sign language form–meaning mapping. [arXiv]
  • Mar 2026Two poster presentations at HSP 2026 (Boston, US): agentive iconicity in VLMs [Abstract] & NPI processing in L2 Turkish [Poster].
  • Oct 2025Book chapter published in Empirical Insights into Language and Cognition (Nobel Akademik Yayıncılık). [PDF]
  • Sep 2025Invited talk at Max Planck Institute for Psycholinguistics: Iconicity in visual communication: From silent gestures and signs to vision–language models. [Slides]
  • Sep 2025Two poster presentations at AMLaP 2025 (Prague): L2 thematic role processing [Poster] & task effects in good-enough parsing [Poster].
  • May 2025Two papers at NAACL 2025 workshops: good-enough parsing with LLMs [CMCL] and Hamshentsnag NLP [LM4UC].
  • Mar 2025Poster presentation at HSP 2025 (Maryland, US): pragmatics predicts phonetic reduction in TİD narratives. [Poster]

Selected Publications

Visual Iconicity Challenge figure

The Visual Iconicity Challenge: Evaluating Vision–Language Models on Sign Language Form–Meaning Mapping

Keleş, O., Özyürek, A., Ortega, G., Gökgöz, K., & Ghaleb, E.

ACL 2026 (Main) arXiv:2510.08482
Reference tracking figure

Reference Tracking Strategies of Deaf Adult Signers in Turkish Sign Language

Keleş, O., Atmaca, F., & Gökgöz, K.

Journal of Pragmatics, 2023
Verbal fluency stimuli figure

Effects of Age of Acquisition and Category Size on Signed Verbal Fluency

Keleş, O., Atmaca, F., & Gökgöz, K.

Language Acquisition, 2022 🏆 Best Article Prize

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