The ninth International Symposium on Brain and Cognitive Science was hosted by Özyeğin University’s Departments of Psychology and Computer Engineering. The symposium featured invited talks by Natalie Sebanz, Esra Mungan, Albert Gatt and Dirk Wulff, who are leading researchers in the field of Cognitive Science, as well as a panel titled “Large language models and ChatGPT” with contributions from Ethem Alpaydın, Gülşen Cebiroğlu Eryiğit, Albert Gatt and Barış Erman. In addition, 82 researchers from different fields of Cognitive Science such as Psychology, Linguistics, Artificial Intelligence, Philosophy, Computer Science and Neuroscience presented their work as posters.