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Unit 1B Theories
| Question | Answer |
|---|---|
| signal detection theory | theory predicting how and when we detect presence of a faint stimulus (signal) amid the backround stimulation (noise); assumes there is no single absolute threshold and detection depends partly on a persons experience, expectations, motivation & alertness |
| Young helmholtz trichromatic theory | the theory that the retina contains 3 different types of color receptors. one most sensitive to red, one to green, one to blue, which when stimulated in combination, can produce the perception of any color. |
| opponent process theory | the theory that opposing retinal processes (red-green, blue-yellow, white-black) enable color vision. for example some cells are stimulated by green and inhibited by red, others are stimulated by red and inhibited by green. |
| place theory | in hearing, the theory that links the pitch we hear with the place where the cochleas membrane is stimulated (also called place coding) |
| frequency theory | the theory that the rate of the nerve impulses traveling up the auditory nerve matches the frequency of a tone, thus enabling us to sense pitch |
| gate control theory | theory that says the spinal cord contains a neurological "gate" that blocks pain signals or allows them to pass on to the brain. |
Created by:
hoffemil