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Running head: ASSIGNMENT 8 S01M Assignment-8 S01V Introduction to Psychology I Ashworth College Part I 1
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ASSIGNMENT 8 The three psychological dimensions of vision: Hue is one of the main properties of a color. It’s associated with the wavelength of light. Shorter waves are perceived as blue and violet, longer waves as red and orange. The sun produces white light that is a combination of all colors produced equally by a glowing object. Brightness is the dimension of visual experience that related to the intensity of light emitted from or reflected to the complexity of light waves. Brightness is related to luminance in the simplest case; the more illuminant the stimulus is, the brighter it appears to be. Stimuli that are red or blue appear brighter than equivalent yellow and green stimuli. Saturation is the dimension of visual experience related to the complexity of light waves. The color of a single wavelength is pure spectral color. These lights are identified fully saturated. In nature, light is rarely pure or of a single wavelength. White light is completely unsaturated. Light is usually a combination of several different wavelengths. The greater number of spectral colors in a light, the lower the saturation. Light of mixed wavelengths look duller or paler than pure light. Part II 5. Circadian rhythms & body clock Most people feel sleepy in the afternoon while they feel alert and energized around 10:00 in the morning. There is something that guides how we feel throughout the day. It is called circadian rhythm. This is a rhythm that is naturally occurring and is built into the systems of the human body along with plants and animals. The term was developed in the 1950s by Franz Hallberg. 2
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ASSIGNMENT 8 There are several criteria that a biological circadian rhythm must follow. First, it must last around 24 hours. In second, the rhythm can be reset by exposure to light and heat. This fact can be observed when we travel across time zones and get jet lag as our bodies adapt to the new local time slowly.
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