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AP Psychology : Sensation and Perception

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Denise Farrar

on 11 December 2012

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Transcript of AP Psychology : Sensation and Perception

By : Denise Farrar AP Psychology: Sensation and Perception Using the 5 senses Sensation Bottom Up Processing Absolute Thresholds Habitation Sensory Adaptation To multiple the ability to detect a signal and a noise. Signal Detection Theory To be able to focus on on a task disregarding the irrelevant or distracting information. Selective Attention Perception organizing and intepreting the senses Psychophysics relationship between physical characteristics of stimuli and how we experience them "does not require thinking" Top Down Requires Thinking. Based off of prior experiences. Example When putting a puzzle together do you use the box or do you figure it out on your own? If you figure out the puzzle on your own without using the box you are using top-down processing. If you finish the puzzle using the box you are using bottom up processing. The minimum amount of stimulation needed to detect stimuli 50% of the time. Difference The difference between two stimuli that a person can detect. Subliminal Below one's absolute threshold. You should be able to hear a person talking from 20 feet away. Example Example Carlos could tell that a envelope with 2 quarters in it was heavier than an envelope with 1 quarter. Carlos could not tell the difference when both envelopes where put in textbooks and asked which was heavier. Intro To Sensation and Perception. Weber's Law To be percieved as different two stimuli must be different by a constant minimum. Example Carlos makes $5.00 p/h.Carlos gets a $1.00 raise.
William makes $150.00 p/h.Will gets a $1.00 raise.
Carlos feels the difference, however does William? Carlos makes $5.00 p/h. Carlos gets a $1.00 raise.
William makes $150.00 p/h. How makes of a raise does Will need to feel a difference in his pay?
Will needs to receive a $30.00 raise to feel a difference. Not Weber's Law. Yes Weber's Law. Diminished sensitivity as a result of constant stimulation. a decrease in response to stimuli after repeated stimulus. Difference A new cell phone ring tone you can hear but after a while it becomes dull and blends in. Example When you walk into a room and smell a new fragrance yet after a while you become accustomed to it and you don't smell it anymore. However when you leave and reenter you will be able to detect the smell all over again. Example Example When Mrs. R and her husband were dating she was expecting him to call. Weather she was out in the garden, bathroom, or rooms away she could hear the phone when it rang. Example When you are playing a video game and your mother starts nagging you about homework. When you start to focus in on her you lose the game. When you focus in on the game you tune her and and win but do not hear what she is saying. Cocktail Party Effect The ability to listen and detect one voice in a crowd of many. Example When Mrs. R went to a Central football game (it was very loud there).Over the shouts and cheers in the crowd she was able to hear someone call her name and detect where it was coming from. Turns out they were some old students of her.
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