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Psychology 2015A/B

Psych 2015BClass NotesChapter1IntroductiontoPerceptionUnderstand the human model of perceptionoThe detectorseyes ears skin nose and mouth receptorsoComputerthe brainUnderstand how we sense things in the environment and interact with themoProblemperception occurs effortlesslythus hard to understandThe Perceptual ProcessA sequence of processes that work together to determine our experience of and reaction to stimuli in the environmentStimulusobjects in the environmentElectricityelectrical signals that are created by the receptors and transmitted to the brainExperience and Action the goal stateto perceive recognize and react to the stimuliKnowledgeknowledge that we bring into the perceptual situation1StimulusThe stimulus can exists both in the environment and within our body2 Aspects of Stimulusboth occur within the environmentEnvironmental stimulieverything around that that we can potentially perceiveAttended stimulichanges from moment to moment and is dependent on what you allocation your attention toEyethe image that we perceive is transformed into an image on the retinaphotoreceptors send the image to the brainwhat we perceive is not an image but a representation of the object2ElectricityEverything we perceive is based on electrical signals in our nervous systemTransductionreceptors transform energy from the environment light into electrical signals oTransformation of one form of energy into anotherTransmissionafter image as been transformedthe electrical signals activate neurons from the eye to the brainoIf the signal does not reach the brain there is NO perceptionProcessingNeural processing occurs once signal has reach the braininteractions between neuronsothe signal is transformed in the braincreating a representation of the original stimulususually different3Experience and ActionPerceptionconscious sensory experience signals are transformed into an experienceRecognitionability to place an object in a categoryseparate from perceptionoVisual Form Agnosiainability to recognize objectsActionmotor activitiesimportant outcome of perceptionkey to survivalThe process for experience and actionyou first perceive the objectyou begin to process the object and eventually recognize itfrom the stage of recognition you may want to get closeractionPerception is a continuously changing processattention changesoReason for the circular perception processthere is no beginning or endcycle4KnowledgeAny information that is brought into the perceptual situationThis information can affect perceptionbottom up vs top down processingHow to Approach the Study of Perception2 approaches to the study of perceptionPsychophysicalquantitative methods to measure relationships between stimuli and perceptionoGustav Fechner 1860Physiologicalmeasures the relationship between the stimuli and physiological processes and between perception and physiological processesohow neurons and the brain create perceptionoPhysiologystudy of electrical responses in the nervous systemchemical processesCognitive Influences on Perception
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