Podcast
Questions and Answers
What is sensation?
What is sensation?
Where are sensory receptors located?
Where are sensory receptors located?
Eyes, ears, skin, etc.
Where does stimulation come from?
Where does stimulation come from?
Sources of energy, light and sound (automatic processes)
What is perception?
What is perception?
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What is an absolute threshold?
What is an absolute threshold?
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What does pitch refer to?
What does pitch refer to?
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What is a difference threshold?
What is a difference threshold?
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What is Weber's constant?
What is Weber's constant?
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What is a just noticeable difference?
What is a just noticeable difference?
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What is Signal Detection Theory?
What is Signal Detection Theory?
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What is light in terms of sensation?
What is light in terms of sensation?
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What does hue refer to?
What does hue refer to?
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What is the cornea?
What is the cornea?
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What is the function of the iris?
What is the function of the iris?
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What is a pupil?
What is a pupil?
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What does the lens do?
What does the lens do?
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What are photoreceptors?
What are photoreceptors?
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What are bipolar cells?
What are bipolar cells?
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What are ganglion cells?
What are ganglion cells?
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What is the optic nerve?
What is the optic nerve?
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What is the retina?
What is the retina?
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What are rods?
What are rods?
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What are cones?
What are cones?
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What is visual acuity?
What is visual acuity?
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What is presbyopia?
What is presbyopia?
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What is dark adaptation?
What is dark adaptation?
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What does complementary refer to in terms of color?
What does complementary refer to in terms of color?
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Red is complementary to?
Red is complementary to?
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Purple is complementary to?
Purple is complementary to?
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Blue is complementary to?
Blue is complementary to?
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What is an additive process?
What is an additive process?
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What is a subtractive process?
What is a subtractive process?
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What are afterimages?
What are afterimages?
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What is the trichromatic theory?
What is the trichromatic theory?
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What is the opponent-process theory?
What is the opponent-process theory?
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What is a trichromat?
What is a trichromat?
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What is a monochromat?
What is a monochromat?
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What is a dichromat?
What is a dichromat?
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What is closure in perception?
What is closure in perception?
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What is visual perception?
What is visual perception?
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What is gestalt?
What is gestalt?
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What does Rubin's vase correlate to?
What does Rubin's vase correlate to?
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What is proximity in perception?
What is proximity in perception?
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What is similarity in perception?
What is similarity in perception?
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What is continuation?
What is continuation?
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What is common fate in perception?
What is common fate in perception?
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What is top-down processing?
What is top-down processing?
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What is bottom-up processing?
What is bottom-up processing?
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What are illusions?
What are illusions?
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What is stroboscopic motion?
What is stroboscopic motion?
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What are monocular cues?
What are monocular cues?
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What is perspective in perception?
What is perspective in perception?
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What is texture gradient?
What is texture gradient?
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What is motion parallax?
What is motion parallax?
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What are illusions of magnitude?
What are illusions of magnitude?
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What is a decibel?
What is a decibel?
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Who is Kohler?
Who is Kohler?
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What is perceptual constancy?
What is perceptual constancy?
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What is convergence in perception?
What is convergence in perception?
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What is accommodation in terms of vision?
What is accommodation in terms of vision?
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What are binocular cues?
What are binocular cues?
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What is the cochlea?
What is the cochlea?
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What is the basilar membrane?
What is the basilar membrane?
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What is the organ of Corti?
What is the organ of Corti?
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What is the auditory nerve?
What is the auditory nerve?
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What are the five basic dimensions of taste?
What are the five basic dimensions of taste?
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What does the Smellen chart measure?
What does the Smellen chart measure?
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What is retinal disparity?
What is retinal disparity?
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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.