Academic Journal
Asymmetric transfer of perceptual learning of luminance- and contrast-modulated motion
| العنوان: | Asymmetric transfer of perceptual learning of luminance- and contrast-modulated motion |
|---|---|
| المؤلفون: | Er A. Petrov |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://jov.arvojournals.org/data/Journals/JOV/933538/jov-10-14-11.pdf. |
| سنة النشر: | 2010 |
| المجموعة: | CiteSeerX |
| مصطلحات موضوعية: | perceptual learning, second-order motion, dual-pathway theory, form-cue invariance |
| الوصف: | Perceptual learning was used as a tool for studying motion perception. The pattern of transfer of learning of luminance- (LM) and contrast-modulated (CM) motion is diagnostic of how their respective processing pathways are integrated. Twenty observers practiced fine direction discrimination with either additive (LM) or multiplicative (CM) mixtures of a dynamic noise carrier and a radially isotropic texture modulator. The temporal frequency was 10 Hz, speed was 10 deg/s, and duration was 400 ms, with feedback. Group 1 pre-tested CM for 2 blocks, trained LM for 16 blocks, and post-tested CM for 6 blocks during 6 sessions on separate days. In Group 2, the LM and CM roles were reversed. The dVimproved almost twofold in both groups. There seemed to be full transfer from CM to LM but no significant transfer from LM to CM. The pattern of post-switch improvement was asymmetric as wellVno further learning during the LM post-test versus rapid relearning during the CM post-test. These strong asymmetries suggest a dual-pathway architecture with Fourier channels sensitive only to LM signals and non-Fourier channels sensitive to both LM and CM. We hypothesize that the channels tuned for the same motion direction but different carriers are integrated using a MAX operation. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.697.8940; http://jov.arvojournals.org/data/Journals/JOV/933538/jov-10-14-11.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.697.8940 http://jov.arvojournals.org/data/Journals/JOV/933538/jov-10-14-11.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.4FBF426E |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |