I am interested in the language processes of a person with a cognitive deficit from birth. The way the person understands the English language in a concise communication manner
The domain you have chosen sounds really interesting ! I had this research area for quite some time in mind. Since I work with metaphors and how we use them in higher cognitive domains like humor and political discourse, you might want to explore how children/ adults with cognitive deficits comprehend everyday humor/ jokes/ sarcasm/ irony etc. (which typically use figuration).
The way to choose your topic is to consider all of your coursework so far and decide which topics interest you most. Then read more and more research literature on the subject and look for a "gap" in the research, i.e., unanswered questions that you can reasonably research.
Hi , psycholinguistics is a very good topic you have chosen .ur efforts of research in this topic is commendable.First you need to visit various institutions to observe the children with disabilities and draw inferences about their deficiet in cognitive approach.Then you search numerous possible solutions to overcome these problems, probably go with a oral survey or statistical method and then read few articles and select areas where you can explore.Linguistics and psychology always go hand in hand.Unless one is able to comprehend the psychological problems in learners, we cannot help them to adopt language learning methods.