Gestalt an organized whole tendency to integrate pieces of information into meaningful wholesĢ1 LO 3.9 Gestalt Principles of Perceptionįigure–Ground the tendency to perceive objects, or figures, as existing on a background Reversible Figures visual illusions in which the figure and ground can be reversedįigure – Ground Organization of the visual field into objects (figures) and surrounding background (ground)Ģ3 LO 3.9 Gestalt Principles of Perception In the circle on the right, people with normal vision will see the number 96, while those with red-green color blindness will see nothing but a circle of dots. In the circle on the left, the number 8 is visible only to those with normal color vision. They are also the primary colors that are opposites of the colors in the picture and provide evidence for the opponent-process theory of color vision.ġ7 LO How Eyes See and How Eyes See ColorĬolor Blindness LO How Eyes See and How Eyes See Color Monochrome colorblindness: a condition in which a person’s eyes either have no cones or have cones that are not working at all Red-green colorblindness: either the red or the green cones are not working protanopia: lack of functioning red cones deuteranopia: lack of functioning green cones tritanopia: lack of functioning blue cones Notice that the colors are now the normal, expected colors of the American flag. Now look at a white piece of paper or a white wall. The retina has three types of color receptors that produce the primary color sensations of red, green, and blue.ġ3 LO 3.3 How Eyes See and How Eyes See ColorĬolor Vision LO 3.3 How Eyes See and How Eyes See Color Trichromatic theory: theory of color vision that proposes three types of cones: red, blue, and green Afterimages: images that occur when a visual sensation persists for a brief time even after the original stimulus is removedġ4 LO 3.3 How Eyes See and How Eyes See ColorĬolor Vision LO 3.3 How Eyes See and How Eyes See Color Opponent-process theory: theory of color vision that proposes four primary colors with cones arranged in pairs: red and green, blue and yellow lateral geniculate nucleus (LGN) of thalamusġ6 Opponent Process Flag Explanation: Color Afterimage Stare at the white dot in the center of this oddly colored flag for about 30 seconds. Mid-frequency sounds are best explained by volley theory, a revision of frequency theory.Ĩ Visual Perception Organization and interpretation of incoming visual information.ĩ Pathways from the Eyes to the Visual Cortex (Left-Right Visual Fields)įeature Detectors nerve cells in the brain that respond to specific features of the stimulus shape angle movement Stimulus Cell’s responsesġ1 Young-Helmholz Trichromatic Theory of Color VisionĪny color can be created by combining three primary colors-red, green, and blue. Place theory: contends that we hear different pitches because different sound waves trigger hair cells on different places of the cochlea’s basilar membrane.įrequency theory: contends that pitch is determined by the frequency with which the basilar membrane vibrates.ħ Pitch Perception Place theory best explains high-frequency sounds, while frequency theory best explains low-frequency sounds. Even such small time lags provide the auditory system with sufficient information to locate the sound. Perception is the process that organizes those stimuli into meaningful objects and events and interprets them.ģ Sound Localization Sound localization: the ability to locate objects in space solely on the basis of the sounds they make Because the ears are only 6 inches apart, the time lag between the sound reaching both ears is very short. Presentation on theme: "Module 16 Perception."- Presentation transcript:
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