title: Stereoscopic depth increases intersubject correlations of brain networks.
abstract: Three-dimensional movies presented via stereoscopic displays have become more popular in recent years aiming at a more engaging viewing experience. However, neurocognitive processes associated with the perception of stereoscopic depth in complex and dynamic visual stimuli remain understudied. Here, we investigate the influence of stereoscopic depth on both neurophysiology and subjective experience. Using multivariate statistical learning methods, we compare the brain activity of subjects when freely watching the same movies in 2D and in 3D. Subjective reports indicate that 3D movies are more strongly experienced than 2D movies. On the neural level, we observe significantly higher intersubject correlations of cortical networks when subjects are watching 3D movies relative to the same movies in 2D. We demonstrate that increases in intersubject correlations of brain networks can serve as neurophysiological marker for stereoscopic depth and for the strength of the viewing experience.
authors.affiliation: Charité - Universitätsmedizin Berlin, Germany; Max Planck Institute for Human Cognitive & Brain Sciences, Leipzig, Germany; Universität Leipzig, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Gaebler
authors.affiliation: Korea University, Seoul, Republic of Korea; Technische Universität Berlin, Germany. Electronic address: felix.biessmann@tu-berlin.de.
authors.forename: Felix
authors.initials: F
authors.lastname: Biessmann
authors.affiliation: Charité - Universitätsmedizin Berlin, Germany.
authors.forename: Jan-Peter
authors.initials: JP
authors.lastname: Lamke
authors.affiliation: Korea University, Seoul, Republic of Korea; Technische Universität Berlin, Germany; Berlin Center for Advanced Neuroimaging, Berlin, Germany.
authors.forename: Klaus-Robert
authors.initials: KR
authors.lastname: Müller
authors.affiliation: Charité - Universitätsmedizin Berlin, Germany.
authors.forename: Henrik
authors.initials: H
authors.lastname: Walter
authors.affiliation: Charité - Universitätsmedizin Berlin, Germany; Bernstein Center for Computational Neuroscience, Berlin, Germany; Berlin Center for Advanced Neuroimaging, Berlin, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Hetzer
mesh_terms: D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D003867:Depth Perception / Q000502:physiology*; D005260:Female; D059907:Functional Neuroimaging / Q000379:methods*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009040:Motion Pictures; D009415:Nerve Net / Q000502:physiology*; D055815:Young Adult
keywords: 3D movies; Canonical correlation analysis (CCA); Immersion; Intersubject correlations; Natural viewing; fMRI