Psych 150 Final Exam Study Guide - Happy studying and may...

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Happy studying, and may the odds be ever in your favor NOTES FOR MIDTERM ONE Can’t step out of your eyes to check Bishop George Barkley--images on the eye painted by God Perceptual system- makes reasonable guesses about what is in the world Vertical/horizontal illusion- lines appear longer Line length illusion- railroad track illusion Lecture 2 What you perceive can be influenced not just by that item, but also by things around it Past experience can influence what you perceive. Hallucination- seeing something that is not there, also happens in dreams Vision: Light- object gets hot enough, electrons vibrate, energy admitted= electromagnetic radiation, travels in waves Radio waves- long wavelengths X-rays- short wave lengths Uv light- short wave lengths Can detect 400-700 nanometers Why do we detect this light? -Don’t detect lower wave length (high frequency) -Damage the eyes, evolve to keep out Radiation is absorbed or reflected Objects that reflect lot of light appear to us to be white Objects that don’t reflect lot of light appear to us to be black -Light being reflected goes into different directions and some goes to your eyes
-Light projects off of the retina (light sensitive part) responsible for detecting light Catarax- lens gets cloudy and cant see through it When looking at the sun, that image is about 8 minutes old 2 reasons: -not enough information on the retina. Retina is flat (2 dimensions) objects in the world are 3 dimensional. Losing information. Figure out what all the information is. Perceptional system has to recreate a 2 dimensional from a 3 dimensional. Have to draw from experience and guess. Mind fills in the blanks. -too much information on the retina. Illustrating it is hard to perceive something with so many details. Always more to describe. Can’t process it all. Would take up a lot of resources to be able to process everything. Lecture 3 Too little information on the retina - can’t just read on the retina to tell you what’s in the world - best guess visual illusions- guesses ambiguous figures- can’t decide Digression: perception -reasoning and guessing -aware that you are weighing the pros and cons -limited access to what your perception system is doing -can’t override your perception system with your knowledge -reasoning like process that has to consider all things lost information from the world- transition 3 dimension to 2 dimension ambiguous- infinite number of objects in the world that can produce any one retinal image *palm test size constancy- perception is size of the object in the world is staying the same even though the size on the retina is changing one thing in the world one size can produce different sizes on the retina depending on how close it is problem= retinal image is ambiguous -same size retinal image can be produced by different size objects -an object of different distances will produce different size retinal images solve it and achieve size constancy artists- perceive on a global sense rather than what is on the retina -guess what the distance is

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