title: Asymmetric perception of radial expansion/contraction in Japanese macaque (Macaca fuscata) infants.
abstract: Visual radial expansion/contraction motion provides important visual information that is used to control several adaptive actions. We investigated radial motion perception in infant Japanese macaque monkeys using an experimental procedure previously developed for human infants. We found that the infant monkeys' visual preference for the radial expansion pattern was greater than that for the radial contraction pattern. This trend towards an "expansion bias" is similar to that observed in human infants. These results suggest that asymmetrical radial motion processing is a basic visual function common to primates, and that it emerges early in life.
authors.affiliation: Department of Psychology, Faculty of Humanities, Niigata University, 2-8050 Ikarashi, Nishi-ku Niigata-city, Niigata 950-2181, Japan. shirai@human.niigata-u.ac.jp
authors.forename: Nobu
authors.initials: N
authors.lastname: Shirai
authors.forename: Tomoko
authors.initials: T
authors.lastname: Imura
authors.forename: Yuko
authors.initials: Y
authors.lastname: Hattori
authors.forename: Ikuma
authors.initials: I
authors.lastname: Adachi
authors.forename: Shigeru
authors.initials: S
authors.lastname: Ichihara
authors.forename: So
authors.initials: S
authors.lastname: Kanazawa
authors.forename: Masami K
authors.initials: MK
authors.lastname: Yamaguchi
authors.forename: Masaki
authors.initials: M
authors.lastname: Tomonaga
mesh_terms: D000375:Aging; D000818:Animals; D008251:Macaca; D009039:Motion Perception; D009483:Neuropsychological Tests; D010775:Photic Stimulation