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Stack #4005173
| Term | Definition |
|---|---|
| sensation | a physical feeling or perception resulting from something that happens to or comes into contact with the body. |
| bottom-up processing | a physical feeling or perception resulting from something that happens to or comes into contact with the body. |
| perception | the ability to see, hear, or become aware of something through the senses. |
| top-down processing | perceiving things based on your prior experiences and knowledge |
| absolute threshold | the lowest level of a stimulus – light, sound, touch, etc. – that an organism could detect. |
| difference threshold | a point or way in which people or things are not the same. |
| signal detection theory | a means to measure the ability to differentiate between information-bearing patterns and random patterns that distract from the information |
| sensory adaption | the way our senses adjust to different stimuli |
| selective attention | the processes that allow an individual to select and focus on particular input for further processing while simultaneously suppressing irrelevant or distracting information. |
| cornea | the transparent layer forming the front of the eye. |
| iris | a flat, colored, ring-shaped membrane behind the cornea of the eye, with an adjustable circular opening (pupil) in the center. |
| pupil | the opening at the center of the iris through which light passes |
| lens | transparent body situated behind the iris in the eye focuses light on the retina |
| retina | a layer at the back of the eyeball containing cells that are sensitive to light and that trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed. |
| receptor cells | proteins either inside a cell or on its surface which receive a signal |
| rods | a type of photoreceptor cell in the retina. They are sensitive to light levels and help give us good vision in low light. They are concentrated in the outer areas of the retina and give us peripheral vision. |
| cones | They give us our color vision |
| optic nerves | comprised of millions of nerve fibers that send visual messages to your brain to help you see |
| blind spot | the point of entry of the optic nerve on the retina, insensitive to light. |
| trichromatic theory | human eyes only perceive three colors of light: red, blue, and green. |
| opponent-process theory | the human visual system interprets information about color by processing signals from photoreceptor cells in an antagonistic manner. |
| pitch | the perception of the frequency of sound waves |
| cochlea | the spiral cavity of the inner ear containing the organ of Corti, which produces nerve impulses in response to sound vibrations. |
| hair cells | the primary sensory receptor cells within the inner ear |
| auditory nerves | the nerve that connects your ears to your brain |