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Chapter 5

Chapter 5 - Sensation - Sept 22.docx

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Department
Psychology
Course
PSY1101
Professor
A L L
Semester
Winter

Description
Chapter5SensationSensation is the ability to detect physical energy from the environment and encode it as neural signalsPerception is the ability to select organize and interpret our sensationsBottomup processing is sensory analysis that starts at the entry levelTopdown processing is the ability to construct perceptions drawing both on sensations coming bottomup and our experience and expectationsPropopragnosiaoAbility to sense but incomplete perception May see all features of a face but unable to recognize the facePsychophysics is the study of relationships between the physical characteristics of stimuli ThresholdsAbsoluteThresholdsMinimum stimulation necessary to detect a particular light sound pressure taste or odour 50 percent of the timeSignalDetectionPredicts when we will detect weak signals measured as our ration of hits to false alarmsUnderstand why people respond differently to the same stimulus or why we can become more aware of smaller stimuliAssumes there is no single absolute threshold and detection depends on different factorsSubliminalStimulationSubliminal refers to below threshold stimulationWe are able to detect below our thresholdsWe are primed when certain associations are activatedpredisposing our perception memory or responseSometimes we feel what we do not know and cannot decideoAn imperceptibly brief stimulus evidently triggers a weak response
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