Ap Psych: Sensation and Perception Essays

2382 Words Nov 24th, 2012 10 Pages
Intro
Senses connect us to ourselves and surroundings.
Sensation: the raw information, doesn't yet mean anything to you until...
Perception: the mental process of sorting, identifying, and and arranging raw sensory data.
Enduring Issues in Sensation and Perception
Person-Situation: how accurately perceptual experiences reflect the world
Mind-Body: experience depending in biological processes
Diversity-University: How similarly people experience events
Stability-Change, Nature-Nurture: How our experience changes our perceptions of the outside world
The Nature of Sensation
Sensation: the experience if sensory stimulation
Receptor Cell: A specialized cell that responds to a particular type of energy
"Fire" when enough stimulation
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Caused by visual adaptation
Receptor cells never have time to completely adjust--vision is constantly shifting in our retinas
From Eye to Brain
Interneurons link receptor cells to one another and bipolar cells to one another.
Ganglion cells: Neurons that connect the bipolar cells in the eyes to the brain
Optic nerve: the bundle of axons of ganglion cells that carries neural messages from each eye to the brain.
Blind spot: the place on the retina where the axons of all the ganglion cells leave the eye and where there are no receptors.
Optic chiasm: the point near the base of the brain where some fibers in the optic nerve from each eye cross to the other side of the brain.
Right visual field -> left hemisphere; left visual field -> right hemisphere
Optic nerves carry messages to the various parts of the brain.
Feature detectors: Specialised bran cells that only respond to particular elements in the visual field such as movement or lines or specific orientation.
PART TWO (pg. 95-105)

Color Vision
Properties of Color
Hue: The aspects of color that correspond to their name like green, blue, red...
Saturation: Richness or vividness of one color
Brightness: The nearness of a color to white
Theories of Color Vision
Additive color mixing: Adds wavelengths of light to produce all the colors (Used when mixing light)
Primary: Red, blue, green
Subtractive color mixing: depends not only on which wavelengths are present, but

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