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Two-stage Model of Visual Perceptual Learning


Visual Perceptual Learning (VPL) refers to a long-term enhancement in visual task performance as a result of visual experience. The mechanisms of VPL is constantly debated. Lower stage models assume that VPL results from visual representation refinement taking place in visual areas. Distinctive characteristics of VPL, such as location specificity and feature specificity, are in accord with the tuning properties of neurons in visual areas. To resolve the controversies, this thesis proposed a two-stage model of VPL: the lower stage and the higher stage are involved in VPL. Both lower stage processes and high stage processes are changed in association with VPL. The research work is then focused on revealing the different roles of each stage in VPL. By showing the dissociation of visual representation refinement and task improvement, it shows visual representation refinement is not necessary for VPL to occur. Further, by carefully manipulating cognitive process involved in VPL, it reveals that interaction of the lower stage and the higher stage result in the development of VPL. Lastly, it pioneered the application of VPL in psychological disorder population. Hopefully, the two stage of VPL framework can inspire more research work to reveal the mechanism of VPL and use VPL to help vulnerable population.
Thesis (Ph. D.)--Brown University, 2022


Tan, Qingleng, "Two-stage Model of Visual Perceptual Learning" (2022). Cognitive, Linguistic, and Psychological Sciences Theses and Dissertations. Brown Digital Repository. Brown University Library.