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Elizane C. Mitchell
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This 3 page Class Notes was uploaded by Kelly Dodge on Sunday October 11, 2015. The Class Notes belongs to PSYC-1001-2 at University of Denver taught by Aimee Reichmann-Decker in Fall 2015. Since its upload, it has received 21 views. For similar materials see Foundations of Psychological Science in Psychlogy at University of Denver.
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Date Created: 10/11/15
Class Notes Sensation October 7 2015 Questions to be asked abut subliminal messages 1 Are these messages really there a Was there a message in Another One Bites the Dust quotIt39s fun to smoke marijuanaquot What is subliminal Absolute threshold light test No No No Yes Yes lObserver s response Tell when you observer detect the light Subliminal threshold When stimuli below one39s absolute threshold for conscious awareness o More than 50 of the time to detecting presence 0 Below threshold subliminalnot being able to detect it Subliminal message in George Bush video BureaucRATS doesn39t affect behavior or judgments because it is a word not a face Subliminal message in Iron Chef McDonalds logo Subliminal power 0 What is the concern about subliminal messages 0 Concern is that subliminal messages somehow bypass normal defense reactions Little mermaid Possible phallic symbol The Rescuers Topless woman in the window What do the stars say above Simba lSex Aladdin Good teenagers take off your clothes Coke and Popcorn in movie theaters Popcorn sales were up 18 CocaCola sales went up 57 HOAX Data was fabricated 00000 0 Subliminal Perception o The messages were there 0 Do they affect people These messages do not seem to in uence behavior Very small effect on behavior in uenced by motivation state Kool Aid Study They CAN in uence judgment and evaluations o Priming Effects of Subliminal Stimuli 0 Better ratings from smiling advisors 0 Can in uence people39s judgements o Subliminal stimulus showing scowling or happy faces can in uence our judgments About ourselves Has to be faces we become experts at processing faces we quickly extract information about the gender and the facial expression Also about stimuli paired with faces o Is the effect of subliminal stimuli different than supraliminal stimuli o Easier to learn when time to process 0 Advertising consider principles of learning Sensation and Perception The Puzzle of Sensation and Perception How do stimuli in our environment become represented in the brain Sensation how we detect physical energy from the environment and encode it as neural signals light color motion sound waves sense of touch taste Perception how we select organize and interpret this information Perception in the Brain 0 Combination of o Sensation Sensory processes bottomup o Perception Cognitive process topdown Sensation BottomUp Processes Pattern Recognition Feature Analysis Patterns can be broken down into elementary features 0 Sense receptors Letter quotAquot Sensed as a blotched decomposed into features and perceived as an quotAquot 0 Feature Detectors Neurons that respond to speci c features of a pattern o Is it merely a bottom up process Obviously not Perception Top down Processing Transduction Sensory information form the environment is converted to neural signals lnattentional Blindness 0 Most people tend to have the impression that they simply see what is there 0 Procedural Transduction Task What of people report seeing the Gorilla 50 0 Failure to perceive something even when eyes are open and image on our retinas Attention 0 Change Bias What percentage of pedestrians noticed the change of the direction asker 47 o All who noticed the change were roughly the same age as the experimenters Inability to detect change assumptions in uence perception 0 Attention and Perception Presence of visual stimulus is not suf cient to guarantee perception Attention is an important component lnattentional blindness Attention alone does not guarantee perception of visual stimulus Expectations in uence both attention and perception Change blindness Can you have sensation without perception What are some other experiences of bottomup input without in uence of topdown processes 0 When you hear someone speak Russian 0 Music SensationPerception Disconnect In cases of brain damage 0 Prosopagnosia Although an induvial can see cannot recognize faces Perception TopDown processing Constructive Nature of Perception Attention and expectations in uence perception Re ects past experiences amp knowledge that in uences processing 0 Context effects Perception of an ambiguous stimulus due to immediate context How items appear in context 0 Perceptual set effects Mental predisposition to perceive one thing and not another 0 Expectation Effects the letters in the words are jumbled but you can still read it
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