Psych 111 1st Edition Lecture 12 Outline of Last Lecture I Sleep Pathology II Emotion III Sensation IV Vision Outline of Current Lecture I Perception II Depth Perception III Pattern Perception IV Motion Perception V Illusions Current Lecture I Perception Perception is the interpretation and processing of sensory stimuli There is both top down and bottom up processing in the brain Bottom up processing is when one uses experience or expertise to recognize something It is quick requires minimal effort and less energy than top down Top down processing is when someone looks at objects and tries to recognize them and store them in memory for future use There are several different types of perception which are depth perception pattern perception color perception and motion perception II Depth Perception Depth perception is the ability of the eyes and the brain to distinguish how near or far objects are from the person and the relative location of the objects to each other as well The relative size and clarity of objects are measured by the depth perception of the eyes and the brain Binocular disparity is when the brain combines what the two eyes see into one picture in the brain because the eyes can see things differently in about a 10 feet radius The less disparity the greater the distance The more disparity the closer the object to eye Interposition is when closer objects will interpose themselves between themselves and further These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute objects you know something is in front of something else when it blocks some part of something else When you cannot see the entirety of something because they are blocked by something else Motion parallax is when a person is in motion stationary objects that are close to them move past more quickly Things closer move more quickly past you III Pattern Perception Pattern perception is the ability of the eyes and the brain to distinguish patterns in everyday life The Gestalt grouping principles are used to distinguish pattern perception The Law of Similarity is when items that are similar tend to be grouped together The Law of Proximity is when things close to each other tend to be grouped together Good Figure is when you see the simplest form possible for example a triangle atop a square Good Continuation is despite bisections or curves lines seem to continue as if a straight line Common Fate is when dots that move together in the same direction are grouped together into a single unit Lastly closure is when parts missing in a circle and square can be missing but the human mind fills in because it is the simplest form possible What you have seen all your life provides support for your educated guess IV Motion Perception Motion perception is the ability of the eyes and the brain to distinguish objects that are in motion from their surroundings and be able to see them at high or slow speeds This also involves the motion parallax and sometimes movement can induce a person to see color Movement in a person has after effects and can change how a person views objects after moving V Illusions Illusions are our ability to perceive depths and sizes of objects allows us to make unconscious inferences Muller Lyer illusions are when you can fool your perceptual system by changing the way the same objects look different Is a depth illusion and what leads you to perceive the line on the left as longer than the right is because of relative size You register the figures as 3 D