title: Neural correlates of the eye dominance effect in human face perception: the left-visual-field superiority for faces revisited.
abstract: Faces are processed best when they are presented in the left visual field (LVF), a phenomenon known as LVF superiority. Although one eye contributes more when perceiving faces, it is unclear how the dominant eye (DE), the eye we unconsciously use when performing a monocular task, affects face processing. Here, we examined the influence of the DE on the LVF superiority for faces using event-related potentials. Twenty left-eye-dominant (LDE group) and 23 right-eye-dominant (RDE group) participants performed the experiments. Face stimuli were randomly presented in the LVF or right visual field (RVF). The RDE group exhibited significantly larger N170 amplitudes compared with the LDE group. Faces presented in the LVF elicited N170 amplitudes that were significantly more negative in the RDE group than they were in the LDE group, whereas the amplitudes elicited by stimuli presented in the RVF were equivalent between the groups. The LVF superiority was maintained in the RDE group but not in the LDE group. Our results provide the first neural evidence of the DE's effects on the LVF superiority for faces. We propose that the RDE may be more biologically specialized for face processing.
authors.affiliation: Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang 10380, Korea.
authors.forename: Wookyoung
authors.initials: W
authors.lastname: Jung
authors.affiliation: Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang 10380, Korea.|Department of Optometry, Eulji University, Seongnam 13135, Korea.
authors.forename: Joong-Gu
authors.initials: JG
authors.lastname: Kang
authors.affiliation: Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang 10380, Korea.
authors.forename: Hyeonjin
authors.initials: H
authors.lastname: Jeon
authors.affiliation: Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang 10380, Korea.|Department of Biomedical Engineering, Hanyang University, Seoul 04763, Korea.
authors.forename: Miseon
authors.initials: M
authors.lastname: Shim
authors.affiliation: Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang 10380, Korea.
authors.forename: Ji
authors.initials: J
authors.lastname: Sun Kim
authors.affiliation: Department of Optometry, Eulji University, Seongnam 13135, Korea.
authors.forename: Hyun-Sung
authors.initials: HS
authors.lastname: Leem
authors.affiliation: Clinical Emotion and Cognition Research Laboratory, Department of Psychiatry, Inje University, Goyang 10380, Korea.|Department of Psychiatry, Ilsan Paik Hospital, College of Medicine, Inje University, Goyang 10380, Korea.
authors.forename: Seung-Hwan
authors.initials: SH
authors.lastname: Lee
mesh_terms: D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D023882:Dominance, Ocular / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology*; D000066499:Facial Recognition / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D014794:Visual Fields / Q000502:physiology*; D055815:Young Adult
keywords: N170; event-related potential; eye dominance; face processing; left-visual-field superiority for faces; visual field