Specificity of fast perceptual learning in shape localisation tasks based on detection versus form discrimination.
Perceptual learning is defined as a long-lasting improvement of perception as a result of experience. Here we examined the role of task on fast perceptual learning for shape localisation either in simple detection or based on form discrimination in different visual submodalities, using identical stimulus position and stimulus types for both tasks. Thresholds for each submodality were identified by four-alternative-forced-choice tasks. Fast perceptual learning occurred for shape detection-based on luminance, motion and color differences but not for texture differences. In contradistinction, fast perceptual learning was not evident in shape localisation based on discrimination. Thresholds of all submodalities were stable across days. Fast perceptual learning seems to differ not only between different visual submodalities, but also across different tasks within the same visual submodality.
Kraft
Antje
A
Department of Neurology, Universitätsmedizin Charité, Berlin, Germany.
Grimsen
Cathleen
C
Trenner
Dennis
D
Kehrer
Stefanie
S
Lipfert
Anika
A
Köhnlein
Martin
M
Fahle
Manfred
M
Brandt
Stephan A
SA
D000328:Adult; D004192:Discrimination, Psychological; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D007858:Learning / Q000502:physiology*; D008297:Male; D010775:Photic Stimulation / Q000379:methods; D012684:Sensory Thresholds; D013647:Task Performance and Analysis; D055815:Young Adult