Welcome to the Turkish Sign Language Lexical Database (TİD-LEX), a collaborative project between Middle East Technical University, Max Planck Institute for Psycholinguistics, and the Deaf community in Turkey.
Our mission is to create a comprehensive and accessible resource for the documentation and study of Turkish Sign Language (TİD), with a focus on enhancing our understanding of the role of lexical properties in sign language structure and acquisition.
With this mission, we aim to develop a database of ~1000 signs from Turkish Sign Language, with ratings for iconicity, frequency, phonological complexity, and kinematic properties of signs. This database aims to serve as a foundation for subsequent projects investigating the acquisition of sign language.
Our Team
Our team consists of researchers, linguists, and Deaf individuals who are passionate about promoting the use and understanding of Turkish Sign Language. We believe that language is a fundamental aspect of human culture and identity, and we are committed to preserving and promoting the linguistic heritage of the Deaf community.
Project Leads
The project is led by Prof. Dr. Aslı Özyürek and Dr. Dilay Z. Karadöller as the main leaders.

Prof. Dr. Aslı Özyürek
Prof. Dr. Özyürek is the director of the Multimodal Language Department at Max Planck Institute for Psycholinguistics and a Full Professor at Radboud University Nijmegen. She is a leading researcher in multimodal language acquisition and has extensive experience studying the development of sign language in children.

Dr. Dilay Z. Karadöller
Dr. Karadöller is an Assistant Professor of Psychology at Middle East Technical University and an Affiliated Researcher at the Max Planck Institute for Psycholinguistics. She is an expert in sign language acquisition and has a deep understanding of the complexities of sign language structure.
Scientific Advisor

Dr. Beyza Sümer
We are grateful to have Dr. Sümer as our collaborator and project advisor on sign language linguistics. Dr. Sümer is an Assistant Professor of Sign Language Linguistics at the University of Amsterdam. She is a renowned expert in sign language linguistics and has provided invaluable guidance and support to our project.
Research Team
We are fortunate to have a team of dedicated researchers, both hearing and Deaf, who are working tirelessly to collect and analyze data for this project.
Announcements
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