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Created with Fabric.js 1.4.5 Unit 4: Basic Principles of Sensation and Perception Sensation and Perception Influences on Perception Vision Visual Organization & Interpretation Hearing The Other Senses Light's wavelength is the distance from one wave peak to the next determines its hue (the color we experience, such as the tulip's red petals or green leaves). Intensity, the amount of energy in light waves (determined by a waves amplitude or height), influences brightness. Sensation is the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment. Perception is the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events. Depth perception is the ability to see objects in 3 dimensions although the images that strike the retina are 2-dimensional; allows us to judge distance. Visual cliff is a laboratory device for testing depth perception infants and young animals. Retinal disparity is a binocular cue for perceiving depth: by comparing images from the retinas in the two eyes, the brain computers distance - the greater the disparity (difference) between the two images, the closer the object. Perceptual set is a set of mental tendencies and assumptions that greatly affects (top-down) what we perceive. Parapsychology is the study of paranormal phenomena, including extrasensory perception (ESP) and psychokinesis. Hermann von Helmholtz's place theory presumes that we hear different pitches because different sound waves trigger activity at different places along by recognizing the specific place (on the membrane) that is generating the neural signal. Frequency theory suggests an alternative. The brain reads pitch by monitoring the frequency of neural impulses traveling up the auditory nerve. Kinesthesia is your sense of the position and movement of your body parts. A companion vestibular sense monitors your head's position and movement.Sensory interaction is theprinciple that one sense may influence another, as whenthe smell of food influences our taste and when a personwho is hard of hearing follows someone's lips to make it easier to understand what they are saying.
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