title: Reverse feedback induces position and orientation specific changes.
abstract: To investigate the mechanisms of perceptual learning, we recently introduced a paradigm in which incorrect, reverse feedback followed after some but not all vernier presentations. This feedback paradigm exerted a strong effect on performance that seemed to bias decisions rather than to yield perceptual learning. Here, we show that observers can develop independent decision biases for different stimulus orientations as well as for different visual field positions. Our results demonstrate that the effects of incorrect, reverse feedback are surprisingly specific.
authors.affiliation: Laboratory of Psychophysics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland. michael.herzog@epfl.ch
authors.forename: Michael H
authors.initials: MH
authors.lastname: Herzog
authors.forename: Knut R F
authors.initials: KR
authors.lastname: Ewald
authors.forename: Frouke
authors.initials: F
authors.lastname: Hermens
authors.forename: Manfred
authors.initials: M
authors.lastname: Fahle
mesh_terms: D003071:Cognition; D003463:Cues; D003657:Decision Making; D004192:Discrimination, Psychological; D030141:Feedback, Psychological; D006801:Humans; D007858:Learning; D009949:Orientation; D010775:Photic Stimulation / Q000379:methods; D012684:Sensory Thresholds; D014794:Visual Fields; D014796:Visual Perception