PSY100H1 Lecture 8: Fri Feb 1 2019
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PSY100H1 Full Course Notes
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Accommodation: muscles change the shape of the lens, flattening it to focus on distant objects and thickening it to focus on closer objects. Photoreceptors: concert energy from light participles (photons) into chemical reaction that produces an electrical signal. Rods: retinal cells that respond to low levels of light, result in black and white perception. Cones: respond to higher levels of light, result in color perception. Transduction goes from rods & comes to bipolar, amacrine, horizontal cells to ganglion cells/optic nerve to thamalus to primary visual cortex. Visual areas beyond visual cortex form 2 parallel processing streams. Dorsal: specialization for spatial perception, where object is and relation to other objects. Ventral: recognition of objects, such as color and shape. Trichromatic theory: perception of color is determined by ratio of activity among 3 receptors. Opposing pairs: red and green, yellow and blue, white and black. How we perceive objects in our environment, organize elements into groups to perceive unified whole.
