title: Perceptual learning of bisection stimuli under roving: slow and largely specific.
abstract: In perceptual learning, performance often improves within a short time if only one stimulus variant is presented, such as a line bisection stimulus with one outer-line-distance. However, performance stagnates if two bisection stimuli with two outer-line-distances are presented randomly interleaved. Recently, S. G. Kuai, J. Y. Zhang, S. A. Klein, D. M. Levi, and C. Yu, (2005) proposed that learning under roving conditions is impossible in general. Contrary to this proposition, we show here that perceptual learning with bisection stimuli under roving is possible with extensive training of 18000 trials. Despite this extensive training, the improvement of performance is still largely specific. Furthermore, this improvement of performance cannot be explained by an accommodation to stimulus uncertainty caused by roving.
authors.affiliation: Laboratory of Vision Physiology, I. Beritashvili Institute of Physiology, Tbilisi, Georgia. kparkosadze@yahoo.com
authors.forename: Khatuna
authors.initials: K
authors.lastname: Parkosadze
authors.forename: Thomas U
authors.initials: TU
authors.lastname: Otto
authors.forename: Maka
authors.initials: M
authors.lastname: Malania
authors.forename: Archil
authors.initials: A
authors.lastname: Kezeli
authors.forename: Michael H
authors.initials: MH
authors.lastname: Herzog
mesh_terms: D000328:Adult; D004215:Distance Perception / Q000502:physiology*; D006801:Humans; D007858:Learning / Q000502:physiology*; D009039:Motion Perception / Q000502:physiology*; D010775:Photic Stimulation; D013647:Task Performance and Analysis