Study guide 2 - Psychology 101 Study guide 2 Chapter 3...

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Psychology 101: Study guide 2 Chapter 3 Sensation -the activation of the sense organs by a source of physical energy o Example- Sight, sound, taste, smell, and touch. Perception - the sorting out, interpretation, analysis and integration of stimuli by the sense organs and the brain. o Example- Absolute threshold - the smallest intensity of a stimulus that must be present for stimulus to be detected. Just noticeable difference - the smallest level of added or reduced stimulation required to sense that a change in stimulation has occurred. You are sitting directly in front of the marching band at a pep rally. When they first begin to play, it is so loud that you think it is unbearable. After 30 minutes, you hardly notice the brass section screeching behind you. This is an example of sensory adaptation Adaptation - an adjustment in sensory capacity after prolonged exposure to unchanging stimuli. Location and function for vision Iris - color part of the eye Pupil - opening depending of the amount of light. Fovea - spot on the retina sharp vision. Rods - thin, cylindrical receptor cells in the retina that is highly sensitive to light. Important for peripherals and night vision. Cones - light sensitive receptor cells in the retina that are responsible for sharp focus and color perception, particularly in bright light. Retina -the part of the eye that converts the electromagnetic energy of light to electrical impulses for transmission to the brain. Ganglion cells - Collect and summarize the visual information compares the amount of light in the center of the eye to amount around it. Stimulations of the nerve cells in the
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eye triggers a neutral response that is transmitted to other nerve cells in the retina called bipolar cells and ganglion cells. Trichromatic theory of color vision -The theory that there are three kinds of cones in the retina, each of which responds primarily to a specific range of wavelengths. Opponent process theory of color vision
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Study guide 2 - Psychology 101 Study guide 2 Chapter 3...

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