Illusion And Context In The Etalk

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Illusion and sensory context does not come from the sensory information sent by our optic nerves but how the brain processes the information and relates them through our past experiences. In July 2009, Beau Lotto talks about the importance of context in sensory information in Oxford, England. In this Etalk, Beau stresses that “the sensory information that falls into your eyes is meaningless” and our brain that makes sense to these information are always changing. The speaker demonstrates his claim by asking the audience to read series of words with missing letters. He explains that the brain associates the arrangement of the letters and patterns to our pre-existing knowledge of language. He then moves on to proving the plasticity of our brain …show more content…
However, the speaker mentions plasticity of the brain and the complex perception of motion which are not the scope of the chapters in the book. From the textbook, I learned that perceptual set is an example of top-down processing (Lilienfeld, 2015, pg 136). It is form when assumptions are made before the processing of visual information (Lilienfeld, 2015, pg136). Beau shows an interesting approach of perceptual sets using language. He presented series of words with few missing letters and my brain immediately starts filling in the blank spaces with certain letter that matches the context. I know that the perceptual process is using the arrangement of letters to influence my perception of the images, in this case letters. The speaker further explains that filling in certain letters in the blank spaces are related to our pre-conceived knowledge and experiences in the past (Lotto, …show more content…
In the talk, Beau asks the audience to focus on the dot between the green and red background for about thirty seconds and switch to the identical pictures of a desert. After doing the procedure the left picture appears to be under green light while the right image is in red light. Beau states that the phenomenon is cause by the plasticity of the brain to change the normality of vision. However, I think of it as the overstimulation of blue and yellow cones of the left eye and red cones on the right eye. Cones are cells in the retina that interprets colours (Lilienfeld, 2015, pg144). When I focus on the green and red colour, the cones in my retina that is responsible for that colour are stimulated and as I look at them for a long period of time the cones will become overstimulated. The desert images seems like they are under red and green light because the over stimulated cones are still trying to recover and go back to their

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