台大心理系

Adaptation occurs when prolonged exposure to a specific stimulus reduces sensitivity to its features, and the resulting perceptual changes are known as aftereffects. In my talk, I will present several experiments that explore an intriguing phenomenon where flashed circular shapes are perceived as polygons. I will also introduce a model that explains these results, based on a group of curvature detectors corresponding to the curvature of circles. This model suggests that when these curvature detectors undergo adaptation, the outputs of adjacent detector groups—those with lower curvature (straight lines) and higher curvature (angles)—become relatively stronger. The combination of these outputs leads to the perception of polygons. Lastly, I will discuss the potential for advancing our understanding of shape perception mechanisms by integrating AI with a focus on adaptation and aftereffects.