Sensation and Perception Flashcards
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Questions and Answers

What is sensation?

  • The minimum difference required to tell two stimuli apart
  • The process of organizing and interpreting sensory information
  • The perception of color based on wavelength
  • The stimulation of sensory receptors and transmission of sensory information to the central nervous system (correct)
  • Where are sensory receptors located?

    Eyes, ears, skin, etc.

    Where does stimulation come from?

    Sources of energy, light and sound (automatic processes)

    What is perception?

    <p>The process of organizing and interpreting sensory information</p> Signup and view all the answers

    What is an absolute threshold?

    <p>Weakest amount of stimulus that a person can distinguish from no stimulus at all</p> Signup and view all the answers

    What does pitch refer to?

    <p>Highness or lowness of a sound</p> Signup and view all the answers

    What is a difference threshold?

    <p>Minimum difference in magnitude of two stimuli required to tell them apart</p> Signup and view all the answers

    What is Weber's constant?

    <p>The perceived difference in the intensity of light (2% or 1/60th)</p> Signup and view all the answers

    What is a just noticeable difference?

    <p>Minimum difference in stimuli that a person can detect (2% or 1/50th)</p> Signup and view all the answers

    What is Signal Detection Theory?

    <p>View that perception of sensory stimuli involves the interaction of physical, biological and psychological factors</p> Signup and view all the answers

    What is light in terms of sensation?

    <p>Visible light that triggers visual sensation</p> Signup and view all the answers

    What does hue refer to?

    <p>Color of light, determined by wavelength</p> Signup and view all the answers

    What is the cornea?

    <p>Transparent tissue forming the outer surface of the eyeball</p> Signup and view all the answers

    What is the function of the iris?

    <p>Muscular membrane whose dilation regulates the amount of light that enters the eye</p> Signup and view all the answers

    What is a pupil?

    <p>Black opening in the center of the iris through which light enters</p> Signup and view all the answers

    What does the lens do?

    <p>Adjusts/accommodates to the image by changing its thickness and focuses image on the retina</p> Signup and view all the answers

    What are photoreceptors?

    <p>Cells that respond to light</p> Signup and view all the answers

    What are bipolar cells?

    <p>Neurons that conduct neural impulses from rods and cones to ganglion cells</p> Signup and view all the answers

    What are ganglion cells?

    <p>Neurons whose axons form the optic nerve</p> Signup and view all the answers

    What is the optic nerve?

    <p>Nerve that transmits sensory information from the eye to the brain</p> Signup and view all the answers

    What is the retina?

    <p>Inner surface of the eye that consists of cells called photoreceptors</p> Signup and view all the answers

    What are rods?

    <p>Rod-shaped photoreceptors that are sensitive only to the intensity of light and allow you to see in black and white</p> Signup and view all the answers

    What are cones?

    <p>Cone-shaped photoreceptors that transmit sensations of color and provide color vision</p> Signup and view all the answers

    What is visual acuity?

    <p>Sharpness of vision (strongest in retina)</p> Signup and view all the answers

    What is presbyopia?

    <p>Condition characterized by brittleness of lens</p> Signup and view all the answers

    What is dark adaptation?

    <p>Process of adjusting to condition of lower lighting by increasing the sensitivity of rods and cones</p> Signup and view all the answers

    What does complementary refer to in terms of color?

    <p>Descriptive colors of the spectrum that when combined produce white or nearly white light</p> Signup and view all the answers

    Red is complementary to?

    <p>Green</p> Signup and view all the answers

    Purple is complementary to?

    <p>Yellow</p> Signup and view all the answers

    Blue is complementary to?

    <p>Orange</p> Signup and view all the answers

    What is an additive process?

    <p>Mixture of lights</p> Signup and view all the answers

    What is a subtractive process?

    <p>Mixture of pigments</p> Signup and view all the answers

    What are afterimages?

    <p>Lingering visual impression made by a stimulus that has been removed</p> Signup and view all the answers

    What is the trichromatic theory?

    <p>Theory that color vision is made possible by three types of cones, some of which respond to red light, some to green and some to blue</p> Signup and view all the answers

    What is the opponent-process theory?

    <p>Theory that color vision is made possible by three types of cones, some of which respond to red or green light, some to blue or yellow and some to the intensity of light</p> Signup and view all the answers

    What is a trichromat?

    <p>Person with normal color vision</p> Signup and view all the answers

    What is a monochromat?

    <p>Person who is sensitive to black and white only (colorblind)</p> Signup and view all the answers

    What is a dichromat?

    <p>Person who is sensitive to black-white and either red-green or blue-yellow and hence partially colorblind</p> Signup and view all the answers

    What is closure in perception?

    <p>Tendency to perceive a broken figure as being complete or whole</p> Signup and view all the answers

    What is visual perception?

    <p>Process by which we organize or make sense of the sensory impressions caused by the light that strikes our eyes</p> Signup and view all the answers

    What is gestalt?

    <p>Perception of the whole, has parts that organize into a whole which is different from the sum of the parts</p> Signup and view all the answers

    What does Rubin's vase correlate to?

    <p>Figure-ground perception that creates reversible figures and contours</p> Signup and view all the answers

    What is proximity in perception?

    <p>Nearness, perceptual tendency to group together objects that are near one another</p> Signup and view all the answers

    What is similarity in perception?

    <p>Perceptual tendency to group together objects that are similar in appearance</p> Signup and view all the answers

    What is continuation?

    <p>Tendency to perceive a series of points or lines as having unity</p> Signup and view all the answers

    What is common fate in perception?

    <p>Tendency to perceive elements that move together as belonging together</p> Signup and view all the answers

    What is top-down processing?

    <p>The usage of knowledge to organize parts of a pattern</p> Signup and view all the answers

    What is bottom-up processing?

    <p>Organization of parts of a pattern to recognize</p> Signup and view all the answers

    What are illusions?

    <p>Sensations that give rise to misperceptions</p> Signup and view all the answers

    What is stroboscopic motion?

    <p>Illusion in perception of motion which uses presented stationary images in rapid succession</p> Signup and view all the answers

    What are monocular cues?

    <p>Cues that can be perceived by only one eye</p> Signup and view all the answers

    What is perspective in perception?

    <p>Cue for depth based on the convergence of parallel lines as they recede into the distance</p> Signup and view all the answers

    What is texture gradient?

    <p>(Monocular) Cue based on perception that closer objects appear to have rough surfaces</p> Signup and view all the answers

    What is motion parallax?

    <p>Cue for depth based on perception that nearby objects move more rapidly than our own motion</p> Signup and view all the answers

    What are illusions of magnitude?

    <p>Deals with people misperceiving how big something is</p> Signup and view all the answers

    What is a decibel?

    <p>Measures sound</p> Signup and view all the answers

    Who is Kohler?

    <p>Formed laws of organization on perception</p> Signup and view all the answers

    What is perceptual constancy?

    <p>Points to instances where our perception remains the same even if stimulus has changed</p> Signup and view all the answers

    What is convergence in perception?

    <p>Binocular cue based on inward movement and focus of eyes as an object draws nearer</p> Signup and view all the answers

    What is accommodation in terms of vision?

    <p>When our lens focuses the incoming light when hitting our retina</p> Signup and view all the answers

    What are binocular cues?

    <p>Involves simultaneous perception by both eyes</p> Signup and view all the answers

    What is the cochlea?

    <p>Inner ear, contains basilar membrane and organ of Corti</p> Signup and view all the answers

    What is the basilar membrane?

    <p>Lies coiled inside cochlea</p> Signup and view all the answers

    What is the organ of Corti?

    <p>Receptor for hearing that lies on basilar membrane</p> Signup and view all the answers

    What is the auditory nerve?

    <p>Axon bundle that transmits neural impulses from organ of Corti to brain</p> Signup and view all the answers

    What are the five basic dimensions of taste?

    <p>Sourness, saltiness, sweetness, bitterness, umami (richness)</p> Signup and view all the answers

    What does the Smellen chart measure?

    <p>Measures visual acuity</p> Signup and view all the answers

    What is retinal disparity?

    <p>Proves that one image is different to one eye compared to the other when distance is involved</p> Signup and view all the answers

    Study Notes

    Sensation and Perception

    • Sensation: Activation of sensory receptors transmitting information to the central nervous system.
    • Sensory Receptors: Located in eyes, ears, skin, and other areas, essential for processing stimuli.
    • Stimulation Sources: Comes from energy forms like light and sound; involves automatic processes.

    Perception

    • Perception: Organizing and interpreting sensations to create mental representations of the environment.
    • Absolute Threshold: The minimal stimulus strength needed for a person to detect a stimulus.
    • Difference Threshold: The smallest noticeable difference in stimuli needed to perceive as distinct; known as just noticeable difference (JND).

    Theories of Sensation

    • Weber's Constant: A principle stating a 2% difference in light intensity is necessary for perception changes.
    • Signal Detection Theory: Suggests perception involves physical, biological, and psychological interactions.

    Visual Perception

    • Light: Visible light that initiates visual sensations.
    • Hue: The color perceived, determined by light wavelength.

    Eye Anatomy

    • Cornea: The eye's transparent outer layer.
    • Iris: A muscular structure controlling light entry via pupil dilation.
    • Pupil: The opening in the iris allowing light passage.
    • Lens: Adjusts its thickness to focus light on the retina.
    • Retina: Inner eye layer that contains photoreceptors (rods and cones).

    Photoreceptors

    • Rods: 125 million, sensitive to light intensity, enable black-and-white vision.
    • Cones: 6.4 million, perceive color, crucial for daylight and color vision.

    Visual Processing

    • Visual Acuity: Sharpness of vision, highest in the retina.
    • Adaptation: Dark adaptation increases sensitivity in low light.
    • Complementary Colors: Colors that combine to produce white light (red-green, purple-yellow, blue-orange).

    Color Theories

    • Trichromatic Theory: Humans have three types of cones for red, green, and blue light.
    • Opponent-Process Theory: Color perception involves opposing pairs (red-green, blue-yellow).

    Perception Principles

    • Gestalt Psychology: Emphasizes perception of wholes that exceed the sum of individual parts.
    • Closure: The tendency to perceive incomplete figures as whole.
    • Proximity and Similarity: Grouping of nearby or similar objects in perception.

    Motion and Depth Cues

    • Top-Down Processing: Organizing experiences based on past knowledge.
    • Bottom-Up Processing: Building perceptions from individual components.
    • Binocular Cues: Cues that require both eyes (convergence, retinal disparity).
    • Monocular Cues: Visual depth cues perceptible with one eye (perspective, texture gradient, motion parallax).

    Auditory Perception

    • Cochlea: Inner ear structure housing auditory receptors.
    • Basilar Membrane: Structure within the cochlea critical to hearing.
    • Auditory Nerve: Transmits sound information from the organ of Corti to the brain.

    Olfactory and Gustatory Perception

    • Five Basic Tastes: Sour, salty, sweet, bitter, umami (rich taste).
    • Smellen Chart: Tool for measuring visual acuity.

    Illusions and Constancies

    • Illusions: Misrepresentations in sensory experiences.
    • Perceptual Constancy: Perception remains constant despite changes in stimuli (brightness, color, shape, size).

    Additional Concepts

    • Afterimages: Visual impressions lingering after stimuli removal, leading to perception of complementary colors.
    • Stroboscopic Motion: Perceived motion from rapid presentation of stationary images.

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    Description

    Test your understanding of key concepts in sensation and perception with these flashcards. Covering definitions and locations of sensory receptors, this quiz is designed to enhance your grasp of how we experience the world around us.

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