Reverse feedback induces position and orientation specific changes |
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Authors: | Herzog Michael H Ewald Knut R F Hermens Frouke Fahle Manfred |
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Institution: | Laboratory of Psychophysics, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland. michael.herzog@epfl.ch |
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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. |
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Keywords: | Perceptual learning Decision theory Verniers |
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