Middle East Technical University 1 article published in JoVE Neuroscience A Naturalistic Setup for Presenting Real People and Live Actions in Experimental Psychology and Cognitive Neuroscience Studies Tuğçe Nur Pekçetin1, Şeyda Evsen2, Serkan Pekçetin3, Cengiz Acarturk4, Burcu A. Urgen5 1Department of Cognitive Science, Middle East Technical University, 2Interdisciplinary Neuroscience Graduate Program, Bilkent University, 3Department of Computer Engineering, Middle East Technical University, 4Department of Cognitive Science, Jagiellonian University, 5Department of Psychology, Interdisciplinary Neuroscience Graduate Program, National Magnetic Resonance Research Center (UMRAM), Aysel Sabuncu Brain Research Center, Bilkent University This study presents a naturalistic experimental setup that allows researchers to present real-time action stimuli, obtain response time and mouse tracking data while participants respond after each stimulus display, and change actors between experimental conditions with a unique system including a special transparent organic light-emitting diode (OLED) screen and light manipulation.