Perceptual completion experiment - Essay Example There are other reasons too, like ‘cortical scotoma’. There have been numerous studies on the process of perceptual completion and various theories on how this process occurs have been put forward. The first person to notice the phenomenon of filling-in was the inventor of kaleidoscope, Sir David Brewster in the nineteenth century. In 1832, he wrote, “Though the base of the optic nerve is insensible to light that falls directly upon it, yet it has been made susceptible of receiving luminous impressions from the parts which surround it, and…the spot…in place of being black, has always the same color as the ground†(Crossland and Rubin, 2007). The phenomenon wasn’t studied for a long time until the twentieth century. In the recent times, however, this phenomenon has been largely studied using something called as ‘artificial scotomas’. V.S. Ramachandran and Richard Gregory developed “artificial scotomaâ€. In artificial scotoma, a small object such as a small dot is surrounded by a background noise.
