Successful learning (e.g., learning symbols in an orthographic system, learning a new computer program, or learning how to drive a car) should establish long-term representations that outlast the period of training, and that would ideally last a lifetime. However, exchanging target and distractor trajectories abolished both neuronal and behavioral effects, suggesting that training-induced changes in stimulus representation are specific to trained stimulus identities.Īrea MT+ (V5), long-term stability, perceptual learning, early visual cortex, visual search Introduction A similar pattern was observed on the neuronal level, when the representation of target and distractor stimuli was examined in early retinotopic visual cortex (V1–V3): training enhanced activity for the target relative to the surrounding distractors in the search array and this enhancement persisted after 3 years. Results show that acquired behavioral improvements were remarkably stable over time and that these changes were specific to trained target and distractor trajectories. Learning stability was again examined behaviorally and using fMRI 3 years after the end of training. The first and last training sessions were carried out during functional magnetic resonance imaging (fMRI). Participants were trained for 3 weeks on a visual search task involving the detection of a dot moving in a “v”-shaped target trajectory among inverted “v”-shaped distractor trajectories. Here, we report on the long-term stability of changes in behavior and brain activity following perceptual learning of conjunctions of simple motion features.
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