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Chapter 1

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University of Guelph
PSYC 2390
Lana Trick

Chapter 1Introduction to Perception1 What are some of the reasons for studying perceptiony Starting with the detectorsthe eyes ears skin receptors and receptors in the nose and mouthand then moving on to the computerthe brain we want to understand how we sense things in the environment and interact with them The brain has 100 billion active units and interconnects so complex that they have still not yet been completely deciphered y It is relevant to future studies in medicine devices to restore perception to people who have lost their vision hearing and treatment for pain also speech recognition systems and highway signs visible to drivers y Perception is something experienced constantly and knowing about how it works is interesting y Help one to become more aware of their own nature of perceptual experiences listening to someone talking tasting food looking at a painting can be appreciated at a deeper level Perceptual processsequences of processes Knowledgerefers to the knowledge that work together to determine our experiencewe bring to the perceptual situation and reaction to stimuli in the environment four a Perceptionalocated above the other three boxes categories include stimulus electricity experience conscience memorybecause it can have its effect at manyaction and knowledge Perception is a experience that occur different points in the process It is anycontinually changing process The changes that when electrical signals information that the perceiver brings tooccur as people perceive is the reason that steps that represent the the situation bottomup processing in the perceptual process are arranged in a circlestimulus moth are and topdownknowledge based with no beginning or end point transformed by the braininto experiences of seeing the moth Theb Recognitionour ability to place an object into a category such as moth that gives itstimulus moth has beenmeaning Perception and recognition are two separate processes perceived but it has also c Actionincludes motor activities such as moving the head or eyes and been recognized andlocomoting through the environment ie looking at the moth and walkingaction has been takentowards it Action is an important part of the perceptual process because of itsbased on the perceptionimportance for survival early evolution of animals was to help control of walking closer to thenavigation catch prey avoid obstacles and detect predators not to createtree to get a better look atconscious perception or the big picture of the environmentthe moth 3 Experience Actionrefers to1 Stimulusrefers to what is out there in the our goalto environment what we pay attention to and whatperceive recognize stimulates our receptorsand react to thea Environmental Stimulusall the things in our stimuli perceivingenvironment that we can potentially perceive ie recognizing andtrees path walking acting theb Attended Stimulusfocusing on one backstage activity stimulus making it the center of attention themoth and changes from moment to moment asattention is shifted from place to placec Stimulus on the Receptorsan image of the2 Electricityrefers to the electrical signals in the nervous system that are stimulus and immediate surroundings is formed created by the receptors and transmitted to the brain on the retina 04mm thick network of lighta Transductionthe transformation of one form of energy into another form ofsensitive receptors and other neurons that line the energy this occurs in the nervous system when energy in the environmentsuch back of the eyeas light energy mechanical pressure or chemical energy is transformed into Because the stimulus moth has beenelectrical energy transformed into an image we can describe theb Transmissionafter the stimuluss image moth has been transformed into image as a representation of the mothelectrical signals in the receptors these signals activate other neurons and travelout of the eye and are transmitted to the brain If the signals dont reach the brainthere is no perception therefore transmission is crucial c Processingas electrical signals are transmitted through the retina and the brain they undergo neural processing involves interaction between neurons
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