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AP Psychology - Sensation & Perception Flashcards

Advanced Placement Psychology
Enterprise High School, Redding, CA
All terms from Myers Psychology for AP (BFW Worth, 2011)

Terms : Hide Images
5329108084sensationthe process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment.0
5329108085perceptionthe process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events.1
5329108086bottom-up processinganalysis that begins with the sensory receptors and works up to the brain's integration of sensory information.2
5329108087top-down processinginformation processing guided by higher-level mental processes, as when we construct perceptions drawing on our experience and expectations.3
5329108088selective attentionthe focusing of conscious awareness on a particular stimulus.4
5329108089inattentional blindnessfailing to see visible objects when our attention is directed elsewhere.5
5329108090change blindnessfailing to notice changes in the environment.6
5329108091absolute thresholdthe minimum stimulation needed to detect a particular stimulus 50 percent of the time.7
5329108092signal detection theorya theory predicting how and when we detect the presence of a faint stimulus (signal) amid background stimulation (noise). Assumes that detection depends partly on a person's experience, expectations, motivation, and alertness.8
5329108093primingthe activation, often unconsciously, of certain associations, thus predisposing one's perception, memory, or response.9
5329108094difference thresholdthe minimum difference between two stimuli required for detection 50 percent of the time. Also called the just noticeable difference (jnd).10
5329108095Weber's lawthe principle that, to be perceived as different, two stimuli must differ by a constant percentage (rather than a constant amount).11
5329108096sensory adaptationdiminished sensitivity as a consequence of constant stimulation.12
5329108097transductionconversion of one form of energy into another. In sensation, the transforming of stimulus energies, such as sights, sounds, and smells, into neural impulses our brains can interpret.13
5329108098wavelengththe distance from the peak of one light or sound wave to the peak of the next. Electromagnetic versions of this vary from the short blips of cosmic rays to the long pulses of radio transmission.14
5329108099huethe dimension of color that is determined by the wavelength of light; what we know as the color names blue, green, and so forth.15
5329108100intensitythe amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave's amplitude.16
5329108101pupilthe adjustable opening in the center of the eye through which light enters.17
5329108102irisa ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening.18
5329108103lensthe transparent structure behind the pupil that changes shape to help focus images on the retina.19
5329108104retinathe light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information.20
5329108105accomodationSensation - the process by which the eye's lens changes shape to focus near or far objects on the retina.21
5329108106rodsretinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don't respond.22
5329108107conesretinal receptor cells that are concentrated near the center of the retina and that function in daylight or in well-lit conditions. These detect fine detail and give rise to color sensations.23
5329108108optic nervethe nerve that carries neural impulses from the eye to the brain.24
5329108109blind spotthe point at which the optic nerve leaves the eye and no receptor cells are located there.25
5329108110foveathe central focal point in the retina, around which the eye's cones cluster.26
5329108111feature detectorsnerve cells in the brain that respond to specific features of the stimulus, such as shape, angle, or movement.27
5329108112parallel processingthe processing of many aspects of a problem simultaneously; the brain's natural mode of information processing for many functions, including vision. Contrasts with the step-by-step (serial) processing of most computers and of conscious problem solving.28
5329108113Young-Helmholtz trichromatic (three-color) theorythe theory that the retina contains three different color receptors—one most sensitive to red, one to green, one to blue—which, when stimulated in combination, can produce the perception of any color.29
5329108114opponent-process theorythe theory that opposing retinal processes (red-green, yellow-blue, white-black) enable color vision. For example, some cells are stimulated by green and inhibited by red; others are stimulated by red and inhibited by green.30
5329108115auditionthe sense or act of hearing.31
5329108116frequencythe number of complete wavelengths that pass a point in a given time (for example, per second).32
5329108117pitcha tone's experienced highness or lowness; depends on frequency.33
5329108118middle earthe chamber between the eardrum and cochlea containing three tiny bones (hammer, anvil, and stirrup) that concentrate the vibrations of the eardrum on the cochlea's oval window.34
5329108119cochleaa coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses35
5329108120inner earthe innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs.36
5329108121place theoryin hearing, the theory that links the pitch we hear with the place where the cochlea's membrane is stimulated.37
5329108122frequency theoryin hearing, the theory that the rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone, thus enabling us to sense its pitch.38
5329108123conduction hearing losshearing loss caused by damage to the mechanical system that conducts sound waves to the cochlea.39
5329108124sensorineural hearing losshearing loss caused by damage to the cochlea's receptor cells or to the auditory nerves; also called nerve deafness.40
5329108125cochlear implanta device for converting sounds into electrical signals and stimulating the auditory nerve through electrodes threaded into the cochlea.41
5329108126kinesthesisthe system for sensing the position and movement of individual body parts.42
5329108127vestibular sensethe sense of body movement and position, including the sense of balance.43
5329108128gate-control theorythe theory that the spinal cord contains a neurological "gate" that blocks pain signals or allows them to pass on to the brain. The "gate" is opened by the activity of pain signals traveling up small nerve fibers and is closed by activity in larger fibers or by information coming from the brain.44
5329108129sensory interactionthe principle that one sense may influence another, as when the smell of food influences its taste.45
5329108130gestaltan organized whole. These type of psychologists emphasized our tendency to integrate pieces of information into meaningful wholes46
5329108131groupingthe perceptual tendency to organize stimuli into coherent groups.47
5329108132depth perceptionthe ability to see objects in three dimensions although the images that strike the retina are two-dimensional; allows us to judge distance.48
5329108133binocular cuesdepth cues, such as retinal disparity, that depend on the use of two eyes.49
5329108134retinal disparitya binocular cue for perceiving depth by comparing images from the retinas in the two eyes, the brain computes distance—the greater the disparity (difference) between the two images, the closer the object.50
5329108135monocular cuesdepth cues, such as interposition and linear perspective, available to either eye alone.51
5329108136perceptual constancyperceiving objects as unchanging (having consistent shapes, size, lightness, and color) even as illumination and retinal images change.52
5329108137color constancyperceiving familiar objects as having consistent color, even if changing illumination alters the wavelengths reflected by the object.53
5329108138perceptual seta mental predisposition to perceive one thing and not another.54
5329108139synesthesiathe controversial claim certain people can combine senses and perceive information through multiple sensations.55

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