title: The influence of colour on oculomotor behaviour during image perception.
abstract: The aim of this study was to investigate how oculomotor behaviour depends on the availability of colour information in pictorial stimuli. Forty study participants viewed complex images in colour or grey-scale, while their eye movements were recorded. We found two major effects of colour. First, although colour increases the complexity of an image, fixations on colour images were shorter than on their grey-scale versions. This suggests that colour enhances discriminability and thus affects low-level perceptual processing. Second, colour decreases the similarity of spatial fixation patterns between participants. The role of colour on visual attention seems to be more important than previously assumed, in theoretical as well as methodological terms.
authors.affiliation: Perception and Eye Movement Laboratory, Department of Neurology, University of Bern, Bern, Switzerland.
authors.forename: Roman
authors.initials: R
authors.lastname: von Wartburg
authors.forename: Nabil
authors.initials: N
authors.lastname: Ouerhani
authors.forename: Tobias
authors.initials: T
authors.lastname: Pflugshaupt
authors.forename: Thomas
authors.initials: T
authors.lastname: Nyffeler
authors.forename: Pascal
authors.initials: P
authors.lastname: Wurtz
authors.forename: Heinz
authors.initials: H
authors.lastname: Hügli
authors.forename: René M
authors.initials: RM
authors.lastname: Müri
mesh_terms: D000328:Adult; D003116:Color; D003118:Color Perception / Q000502:physiology*; D015350:Contrast Sensitivity / Q000502:physiology; D004192:Discrimination, Psychological / Q000502:physiology*; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology; D013997:Time Factors