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AP Psychology Chapter 4: Sensation and Perception

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101381469Transductiona process during which signals are transferred into neural impulses
101381470Sensory Adaptationdecreased responsiveness to stimuli due to constant stimulation eg. socks on feet
101381471Sensory Habituationour perception of sensations is partially due to how focused we are on them
101381473Sensationactivation of our senses
101381474Perceptionthe process of understanding sensations
101381475Energy SensesVision (light), hearing (sound waves), and touch (pressure).
101381476Chemical Sensessmell and taste
101381477Visionthe dominent sense in human beings, gather information using their surroundings more than any other sense
101381478Corneathe protective covering that light first enters through, helps focus light
101381479Pupillight travels through it, the shutter of a camera
101381480Lenscurved and flexible in order to focus light
101381481Retinaa screen in the back of the eye on which inverted images are projected
101381482Feature Detectorsnerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement
101381483Optic Nervethe nerve that carries neural impulses from the eye to the brain
101381484Occipital Lobethe lobe in which the visual cortex is, the point that sensation ends and perception begins
101381485Visible LightElectromagnetic radiation that can be seen with the unaided eye
101381486Rodsrespond to black and white, outnumber 20:1
101381487Foveaan indentation in the center of the retina that has the highest concentration of cones
101381488Blind Spotthe spot where the optic nerve leaves the retina and has no cones or rods
101381489Trichromatic Theoryoldest and most simple theory, we have three cones that detect blue red and green
101381490Color Blindnesscannot see certain colors
101381491Afterimagesif you stare at one color for a while then look at a blank space, you will see color, stare at green, it will be red, yellow blue
101381492Opponent-Process Theorystate that sensory receptorsare arranged in retina are in pairs of red/green, yellow/blue, black/white
101381493Hearingauditory senses, waves are created in the air
101381494Sound Wavescreated by vibrations which travel through the air and collect in our ears
101381495Amplitudethe height of the wave and determines the loudness, measured in decibels
101381496Frequencyrefers to the length of the waves and determines pitch, measured in megahertz
101381497Cochleathe snail-shaped tube (in the inner ear coiled around the modiolus) where sound vibrations are converted into nerve impulses by the Organ of Corti
101381499Frequency Theorytheory that we sense pitch because the hair cells fire at different rates
101381500Conduction Deafnessoccurs when some goes wrong with the system of conducting the sound to the cochlea
101381502Touchsense is activated when the skin is indented, pierced, or experiences a change in temperature
101381504Taste/Gustationchemical sense involved in food
101381505Smell/Olfactiondepends on chemicals emitted by substance
101381506Vestibular Sensethe sense that tells how our body is oriented in space
101381507Kinesthetic Sensethe sense that gives us feedback about the position and orientation of specific body parts
101381508Absolute Thresholdthe smallest amount of stimulus we can detect
101381509Subliminal Messagesstimuli below our absolute threshold
101381510Difference Thresholdis the smallest amount of change needed in a stimulus before we can detect a change
101381511Weber's Lawstates that the change needed is proportional to the original intensity of the stimulus
101381512Signal Detection Theorythis theory investigates the effects of the distractions and interference we experience while perceiving the world
101381513Top-down Processingperceive by filling in gaps in what we sense, less accurate but quicker than bottom-up
101381514Perceptual Seta predisposition to perceive something in a certain way
101381515Bottom-up Processingwe use only the features of the object itself to build a complete perception, automatic process, takes longer but more accurate than top-down
101381516Gestalt Ruleswe normally perceive images as groups, not as isolated elements, innate and inevitable
101381517Proximityobjects that close together are more likely to be perceived as belonging to the same group
101381518Similarityobjects that are similar in appearance are more likely to be perceived as belonging to the same group
101381519Continuityobjects that form a continuous form are more likely to be perceived as belonging in the same group
101381520Closureobjects that make a recognizable image are more likely to be perceived as belonging in te same group even if it contains caps
101381521Constancyour ability to maintain a constant perception of an object despites changes in light, angle, etc.
101381522Size Constancyobjects closer to our eyes will produce bigger images on our retinas, but we take distance into account
101381523Shape Constancyobjects viewed from dfferent angles will produce different shapes, but we know the shape of an object remains constant
101381524Brightness Constancyobjects as being a constant color even as the light reflected off of them changes
101381525Depth CuesPerceptual features that impart information about distance and three-dimentional space
101381526Light Intensityhow much energy a light contains, how bright the object is
101381527Light Wavelengthdetermines the particular hue, longer than visible light infrared, microwaves, radio waves, shorter, UV and X
101381528Color Spectumlongest to shortest wavelength: red orange yellow green blue indigo violet
101381529Iristhe muscles that control the pupil, dilate it to let more light in, make it smaller to let less light in
101381530Accommodationlight that centers the pupil is focused by the lens
101381531Conesrespond to color
101381534Left Hemisphereimpulses from the left side of the retina go here
101381535Right Hemisphereimpulses from the right side of the retina go here
101381536Optic Chiasmthe spot where the nerves cross each other
101381537Outer Ear/Pinnasound waves collected here
101381538Auditory/Ear Canalwaves travel through here to eardrum
101381539Ear Drum/Tympanic Membranea thin membrane that vibrates as the sound wave hits it
101381540Hammer/Anvil/Stirrupthree bones as the ossicles, vibration transmitted to the oval window
101381541Oval Windowmembrane similar to the eardrum, attached to the cochlea
101381542Organ of Cortineurons activated by movement of hair cells, fires, impulses then transmitted to the brain via auditory nerve
101381555Monocular Cuesdepth cues that do not depend on having two eyes
101381556Binocular Cuescues that depend on having two eyes
101381557Linear Perspectiveto draw train tracks, you would draw two lines that converge at the top of the paper
101381558Relative Size Cuedraw things closer to the viewer as bigger
101381559Interposition Cueobjects that block the view to other objects must be closer
101381560Texture Gradientwe know that we can see details in texture close to us but no far away
101381561Shadowingby shadowing part of your picture, you can imply where the light source is thus implying depth and position of objects
101381563Convergenceas an object gets closer to our face, our eyes must move toward each other to keep focused on the object

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