Hospital Israelita Albert Einstein (HIAE) 1 article published in JoVE Neuroscience Group Synchronization During Collaborative Drawing Using Functional Near-Infrared Spectroscopy Valéria Gonçalves da Cruz Monteiro1, Jade Antunes Nascimento1, Paulo Rodrigo Bazán1, Shirley Silva Lacerda1, Joana Bisol Balardin1 1Hospital Israelita Albert Einstein (HIAE) The present protocol combines functional near-infrared spectroscopy (fNIRS) and video-based observationto measure interpersonal synchronization in quartets during a collaborative drawing task.