absence of cue-recruitment for extrinsic signals sounds, spots, and swirling dots fail to influence perceived 3d rotation direction after training缺乏cue-recruitment外在信号声音,斑点,旋转点不影响感知训练后三维旋转方向.pdfVIP

Absence of Cue-Recruitment for Extrinsic Signals: Sounds, Spots, and Swirling Dots Fail to Influence Perceived 3D Rotation Direction after Training Anshul Jain*, Stuart Fuller, Benjamin T. Backus Graduate Center for Vision Research, State University of New York College of Optometry, New York, New York, United States of America Abstract The visual system can learn to use information in new ways to construct appearance. Thus, signals such as the location or translation direction of an ambiguously rotating wire frame cube, which are normally uninformative, can be learned as cues to determine the rotation direction [1]. This perceptual learning occurs when the formerly uninformative signal is statistically associated with long-trusted visual cues (such as binocular disparity) that disambiguate appearance during training. In previous demonstrations, the newly learned cue was intrinsic to the perceived object, in that the signal was conveyed by the same image elements as the object itself. Here we used extrinsic new signals and observed no learning. We correlated three new signals with long-trusted cues in the rotating cube paradigm: one crossmodal (an auditory signal) and two within modality (visual). Cue recruitment did not occur in any of these conditions, either in single sessions or in ten sessions across as many days. These results suggest that the intrinsic/extrinsic distinction is important for the perceptual system in determining whether it can learn and use new information from the environment to construct appearance. Extrinsic cues do have perceptual effects (e.g. the ‘‘bounce-pass’’ illusion [2] and McGurk effect [3]), so we speculate that extrinsic signals must be recruited for perception, but only if certain conditions are met. These conditions might specify the age of the observer, the strength of th