Why is the idea of perception important in a thesis/study?
The idea of perception or even the idea of point of view is very important, because it shows the reality that not all people think the same way as you. There are many different perspectives and theories through which people view the world. In fact, the way you view the world is also biased. This is the basic insight of postmodernism.
So, when you are writing a thesis or study on a topic, you need to be aware of two things. You need to be aware that the people whom you read have their biases, points of views, perceptions, theories, and the like. So, you will need to read critically. Also you need to realize that you have your ownperceptions and theories as well. So, it is best to write down and let your readers know from where you are coming. This is honest and this transparency will help your readers to follow your train of thought.