Psych Ch 5
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Sensation | the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment
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| Perception | process of selecting, organizing, and interpreting our sensations
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| Top down processing | relating your stored knowledge to the sensory input (prosopagnasia)
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| Psychophysics | the study of relationships between the physical characteristics of stimuli, such as their intensity, and our psychological experience of them
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| Bottom Up processing | analysis that begins with the sense receptors and works up to the brian's integration of sensory info
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| absolute threshold | the minimum stimulation needed to detect a particular stimulus 50 percent of the time
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| Signal detection Theory | predicts how and when we detect the presence of a faint stiumulus (signal) amid background stimulation (noise). Assumes there is no single abs. thresh and that detection depends partly on a person's experience, expectations, motivation, and level of fatig
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| Subliminal | below ones abs thresh for concious awareness
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| Y or N on subliminal messages? | May be affected, process info w/out being aware. Sub sensatin but not PERSUASION
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| Difference Threshold aka JND | the minimum difference a person can detect between any two stimuli; increases with magnitude of stim
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| Weber's Law | For the average person to perceive a diff, the diff must be in proportion 8% lights, 2% weights, .3% freq
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| Sensory adaptation | diminished sensitivity as a consequence of an unchanging stimulus (our nerve cells start to fire less frequently)
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| Sensory transduction | sensory systems convert stimulus energy into neural messages
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| Wavelength | the distance from one wave peak to the next
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| hue | the color we experience
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| intensity | the amount of energy in light waves (determined by lights amplitude or height)
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| Pupil | where light enters
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| iris | regulates amt of light entering eye, colored portion of the eye, controls size of pupil opening
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| Lens | Behind pupil that changed shape to focus images on the retina
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| accomodation | the process by which the eye's lens changes shape to focus the image of near objects on the retina
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| Acuity | sharpness of vision
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| nearsightedness | nearby objects are seen more clearly than distant objects bc the lens focuses the image of distant objects in front of the retina
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| farsightedness | faraway objects are seen more clearly than near objects bc the image of near objects is focused behind the retina
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