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Week 4 Part 3 Notes: Sensation and Perception

by: Chandler Notetaker

Week 4 Part 3 Notes: Sensation and Perception PSYCH 1101

Marketplace > Cornell University > Psychology > PSYCH 1101 > Week 4 Part 3 Notes Sensation and Perception
Chandler Notetaker

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Chapter 4 Notes will be up this weekend
Introduction to Psychology
Pizarro, D
Class Notes
sensation, perception
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This 2 page Class Notes was uploaded by Chandler Notetaker on Friday September 16, 2016. The Class Notes belongs to PSYCH 1101 at Cornell University taught by Pizarro, D in Fall 2016. Since its upload, it has received 28 views. For similar materials see Introduction to Psychology in Psychology at Cornell University.


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Date Created: 09/16/16
Week #4 (Sensation and Perception Pt 2.)  9/16/16:     ❖ Perception is a difficult problem   ➢ The mind uses tricks in order to make sense of life around you   ➢ Visual perception: ​ our mind makes certain assumptions about the environment to  help us see accurately despite having limited data to work with   ➢ If the brain is using rules, the general strategy is to come with visual stimuli to  unmask the tricks (fool the system)­ to get  a better sense for the rules it's using   ➢ The table trick: Gives us insight on how the brain is trying to figure out   ❖ Why? The Perception Uses Some simple Rules   ➢ Shadows make surfaces darker  ➢ When we see a surface in a shadow, we automatically assume it is lighter than it  looks  ❖ How Do we Determine What is an object?  ➢ Proximity​ of objects makes the brain think there are groups of things rather than  individual objects  ➢ Similarity: ​Things that look alike next to things that are not similar makes the  brain think there are two groups   ➢ Closure:​ using cues to understand the closure of one shape compared to another  put things together   ➢ Your brain is contributing input of other images to make sense of life   ➢ Good continuation​: we use queues to use our natural environment to decrease the  amount of possibilities that are actually present.  ➢ Good form​: Formation of images change how we perceive the overall shape  ❖ Depth   ➢ Depth perception: Could end up with people who ask: Is there a police standing  on the corner or someone in your hair  ❖ Binocular Depth Cues   ➢ Binocular disparity­​ images gcing different infor to each eye  ➢ Convergence​­ at close distances, how much your eye is crossed gives the brain  info about depth,   ❖ Monocular Depth Cues    ➢ size: distant objects subtend smaller visual angles than near objects,  grain, size, and motion parallax.  ➢ Müller Lyer Illusion:   ■ The perceptual psychologists have hypothesized that the top line looks  longer because it also looks farther away  ■ Specifically, the inward pointing arrows signify that the second  line is closer to you and the outward pointing arrows the opposite  case  ➢ Ponzo illusion  ■ Converging line: We perceive that the line that is further  is longer  away but both lines are the same length    ❖ Sesnastionand perception give us internal representation of the world     ❖ But How Accurate/ Objective Is it?   ➢ Perception is not perfect   ■ We are susceptible to illusions,   that what we see can vary depending  on  other  visual cues present  ■ Visual context: surrounding lines,  shadows  ■ Also shaped by broader context­­ expectations about what you're  perceiving  ■ E.g. interpretation if ambig figures   ■ Ebbinghaus illusion:​ We are perceiving that a lot of things are smaller  because the overall environment shows a comparison  ● If the outside circles were not taken into account, all circles would  be the same size because it is more direct.   ➢ Magic is based on tricking the mind systems   ❖ The McGurk Effect​: An auditory Illusion because what you're seeing clashes with what  you're hearing   ❖ Eyesight overrides what we are hearing      


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