PSY 100: Week 3 class notes
PSY 100: Week 3 class notes PSY 100-01
UW - L
Popular in General Psychology
Popular in Psychology
This 4 page Class Notes was uploaded by Natalie Notetaker on Tuesday October 4, 2016. The Class Notes belongs to PSY 100-01 at University of Wisconsin - La Crosse taught by Staff in Fall 2016. Since its upload, it has received 3 views. For similar materials see General Psychology in Psychology at University of Wisconsin - La Crosse.
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Date Created: 10/04/16
Hemispheric Dominance Left hemisphere (LH): Language Right hemisphere (RH): control and recognition of facial expressions analysis of complex visual patterns o faces Corpus Callosum Bundle of fibers connecting the two hemispheres of the brain. Sensation & Perception Sensation: the initial process of detecting and encoding environmental energy. Perception: the process of organizing and interpreting sensations into meaningful experiences. Transduction: converting energy in the environment into electrical signals. Absolute threshold: the smallest amount of stimulus energy necessary for an observer to reliably detect a stimulus (i.e. detect the stimulus at least half of the time). Parts of the Eye Cornea & Lens Responsible for focusing images on the retina. o Cornea: 80% of the focusing power of the eye. o Lens: 20% of the focusing power of the eye. Iris & Pupil The iris can change the size of the pupil to control the amount of light entering the eye Retina A layer of neurons at the back of the eye containing the photoreceptors. The Photoreceptors Photoreceptors are located at the back of the retina, and contain photopigments that signal the brain when exposed to light. *carrots only help your eyes adjust to the night better Cones(everywhere in the retina): used for high illumination and color vision Concentrated in the Fovea ~6 million cones per eye Rods(only in the periphery): used for low illumination/ nighttime vision Found only in the periphery ~120 million rods per eye Fovea: The central 0.5 0.3 degrees of vision. The fovea consists entirely of cone receptors. Color Vision Theories of color vision: YoungHelmholtz Trichromatic Theory (1802): Proposed that there are three different types of color receptors (cones), each responding maximally to a different wavelength but having some response to virtually every wavelength. Hering’s OpponentProcess Theory (1878): redgreen and blueyellow opponent process cells further filter the color message on the way to the brain. o exposure to the color red will cause a green afterimage and vise versa. o exposure to blue will create a yellow afterimage and vise versa. Color Blindness Color blindness is the result of a malfunction in one or more of the three types of cones. Most colorblind individuals are men because the trait for colorblindness is carried on the x chromosome. The Auditory System Sound: pressure changes in a medium capable of being detected by auditory organs. Tympanic membrane (eardrum): vibrates in response to pressure changes in the atmosphere. Ossicles: three bones that transmit vibrations from the tympanic membrane to the oval window. Cochlea: fluidfilled, bony, snailshell shaped chamber containing the smaller structures of the inner ear. Hair cells: receptors for sound attached to the auditory nerve.
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