Chapter 13 provides insight into how vision and speech can work together in perception. An example of how the two senses are used together when perceiving what a person is saying is the McGurk experiment. In the video provided in the lecture slides, the McGurk experiment is described. The video shows how by looking at
the person while listening you hear the person saying "da da". Then by just listening and not looking you hear "ba ba". Finally, by just looking at the person and not hearing you see the person saying "ga ga". This experiment shows how the senses work together and were not developed independently of each other.
This is very interesting to me because I have noticed before that if I am having trouble seeing a person, it makes it more difficult to understand what they are saying. For example if I do not have my glasses on and I am talking to someone while looking at them, I find it hard to focus on what the person is saying. From that I would think that there is a link between hearing and seeing.