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PSYCH 2H03 (134)


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Judith Shedden

thJanuary 15 2013 Psych 2H03 Human LearningCognition AttentionChange Blindnessdo you sometimes look but not seewe experience our visual world as stable same object same appearance same location despite constant changes in the visual inputwe do not notice changeRonald Rensinks labDan Simons labChange Blindness SimonsLevin 1998experimenter 1 stopped a pedestrian on the quad Cornell to ask for directionstwo people carrying a door walked through the conversationexperimenter 1 changed places with one of the door carriers experimenter 2resultswhen told this is a psychology experiment about the things people pay attention to in the real world Did you notice anything unusual at all when that door passed by a minute agoOnly HALF the people noticed the changeThey did not notice the person asking directions had switchedconclusionwe do not store very detailed visual representations of much of what we perceiveattention is critical to see we must attendAttentionwhat is attentioneveryone knows what attention is It is the taking possession by the mind in clear and vivid form of one out of what seem several simultaneously possible objects or trains of thought Focalization concentration of consciousness are of its essence It implies withdrawal from some things in order to deal effectively with othersthe focusing of mental effort on sensory andor mental eventswere limited in how much information we can take in and deal with at one timewe arent capable of processing all information therefore we must be able to select the information we attend tosome stimuli are so strong that they grab our attention regardless if we want to attend to itThe Domain of Attentionalerting orientingdetect and orient toward a signalautomaticprimitive form of attentionpattern recognitionvigilanceeg air traffic controller monitor many patterns of signalmaintenance of a level of concentrationwe arent capable of sustaining this kind of attention without performance deteriorating approximately 45minutes to an hourpattern recognitionprocessing capacitythe system has a limitselective attention divided attentionhow we deal with limitscapacity in terms of selectionwhat are the processing limits How many things can you do at oncedivided the splitting of attentionselective switching between the two taskslevel of arousalgeneralized capacity try hardercontrol of attentionautomatic versus controlled processingconsciousnesswe are conscious of what we attend toare you only conscious of things you attend toProcessing Capacity and Selective AttentionBottleneck metaphorAt what stage does selection occur In other words where is the bottleneckWhat determines what information passes through the bottleneck and what information is lost or attenuatedWhat kind of control do we have over what information passes through What is involved in the selection of informationMaybe we can recognize everything but only a small amount can make it into processingIconic memoryEarly versus Late Selection Initial modelsearly selection early filer that happens after the sensory registration and store that happens early in attentionselective attention is a switchmight detect the physical differences
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