title: Individual differences in human eye movements: An oculomotor signature?
abstract: Human eye movements are stereotyped and repeatable, but how specific to a normal individual are the quantitative properties of his or her eye movements? We recorded saccades, anti-saccades and smooth-pursuit eye movements in a sample of over 1000 healthy young adults. A randomly selected subsample (10%) of participants were re-tested on a second occasion after a median interval of 18.8days, allowing us to estimate reliabilities. Each of several derived measures, including latencies, accuracies, velocities, and left-right asymmetries, proved to be very reliable. We give normative means and distributions for each measure and describe the pattern of correlations amongst them. We identify several measures that exhibit significant sex differences. The profile of our oculomotor measures for an individual constitutes a personal oculomotor signature that distinguishes that individual from most other members of the sample of 1000.
authors.affiliation: Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom; Department of Optometry and Visual Science, City University London, Northampton Square, London EC1V 0HB, United Kingdom.
authors.forename: Gary
authors.initials: G
authors.lastname: Bargary
authors.affiliation: Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom; School of Psychology, University of Sussex, Brighton, United Kingdom.
authors.forename: Jenny M
authors.initials: JM
authors.lastname: Bosten
authors.affiliation: Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom; School of Psychology, University of Melbourne, Australia.
authors.forename: Patrick T
authors.initials: PT
authors.lastname: Goodbourn
authors.affiliation: Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom.
authors.forename: Adam J
authors.initials: AJ
authors.lastname: Lawrance-Owen
authors.affiliation: Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom; Centre for Vision Science and Vascular Biology, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom.
authors.forename: Ruth E
authors.initials: RE
authors.lastname: Hogg
authors.affiliation: Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom. Electronic address: jm123@cam.ac.uk.
authors.forename: J D
authors.initials: JD
authors.lastname: Mollon
mesh_terms: D000293:Adolescent; D000328:Adult; D023882:Dominance, Ocular / Q000502:physiology; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007206:Individuality; D008297:Male; D010551:Personality / Q000502:physiology; D011698:Pursuit, Smooth / Q000502:physiology*; D012438:Saccades / Q000502:physiology*; D012737:Sex Factors; D055815:Young Adult
keywords: Anti-saccades; Autism spectrum quotient; Biometric; Endophenotype; Extraversion; Eye dominance; Eye movement; Factor analysis; Handedness; Individual differences; Personality; Reliability; Saccades; Sex differences; Smooth pursuit