 Hi, and welcome back to this video course on biological psychology. Now, this is section 3 in which we're going to talk about perception. And this video, video 3.1, is the introduction to section 3. So we're going to start by providing some reading, some texts. And as throughout this course, we're going to use the free textbooks provided by openstex.org, which you can download for free from this URL. From the psychology textbook, we're going to use chapter 5, sensation and perception. And from the anatomy and physiology textbook, we're going to rely on section 14.1 about sensory processing and 14.2 about central processing. And I always like to recommend a more accessible popular science book for the interested reader. And this time, I would like to recommend a book that is personally very dear to me, The Mind's Eye by Oliver Sechs. Now Oliver Sechs is a clinical neurologist, so someone who works with patients. And in this book, as in many of his books, he talks about individual patients that have particular symptoms, and in this case, perceptual deficits. So for example, he talks about a woman who develops agnosia, so she becomes progressively less able to recognize the objects that she sees. Now what makes this book somewhat grim, but beautiful at the same time, is that Oliver Sechs also talks about his own ocular cancer, which he developed at some point. So he had a tumor in his eye. Now at the end of this book, he was treated for this and mostly cured. Now what we know now is that at some later point in his life, this ocular cancer came back and eventually killed Oliver Sechs not too long ago. So I think reading about this now with the knowledge that we have now makes this a bittersweet experience. But it's nevertheless a very good book and I really fully recommend it. So what are we going to talk about in this section? So in video 3.2, the next video, we're going to first briefly talk about what sensation is and what perception is and the various senses that we have. Then in video 3.3, we're going to move to vision, visual perception, followed in video 3.4 by Gestalt theory, which is a theory describing how we process visual information. Then we're going to switch modalities in section 3.5 and we're going to talk about hearing, followed by touch in 3.6. 3.7 is going to discuss taste and smell. And finally in 3.8, we're going to talk about balance. Now without further ado, let's move on to the next video, video 3.2, in which we're going to talk about sensation and perception.