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29 Cards in this Set
- Front
- Back
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Sensation
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process by which our
sensory receptors and nervous system receive and represent stimulus |
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Perception
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process of organizing and interpreting sensory information, recognize objects and events
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Bottom-up processing
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analysis that begins with the sense receptors and works up to the brain’s intergration of sensory information
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Top-down processing
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information processing guided by higher-level mental processes
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Difference threshold
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just noticeable difference, is the minimum difference a person can detect between any two stimuli
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Weber's Law
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to perceive difference between two stimuli, there must be a constant minimum percentage difference
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Sensory Adaptation
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diminishing sensitivity to an unchanging stimulus
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Vision
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understanding how light works and how our eyes operate
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Light
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electromagnetic energy that travels in wavelengths , we cannot see all forms of light
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Rainbows occur when ...
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light filters through water vapor
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The Colors of a Rainbow
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Red, Orange, Yellow, Green, Blue, Indigo, Violet (ROY G. BIV)
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Pupils size reflects ...
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emotion
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RODS
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only sensitive to the brightness of light (black and white)
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CONES
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provide us with color vision
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Visual acuity
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sharpness of vision, determined by our ability to see visual details in normal lighting
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Nearsighted
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sees objects clearer when they are closer
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Farsighted
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see objects clearer when they are further
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What determines color?
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the wavelength of light
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How does sound travel?
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in waves caused by changes in air pressure caused by vibrations
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A vibration is called ...
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a cycle or a sound wave
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Each sound has its own ___ and ___
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pitch and loudness
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Frequency
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the number of cycles per second (the more cycles, the higher the pitch)
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Human ears can hear sound waves that vary from ___ to ___
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20 to 20,000 cycles per second
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Dogs and dolphins hear sounds that are above ___
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20,000 cycles per second
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Loudness is determined by ___
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the height of the sound wave
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What is the height of the sound wave known as?
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the amplitude
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Loudness is measured in ...
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decibels (dB)
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___ is considered to be the threshold of hearing
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Zero dB
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Zero dB is as loud as ...
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a ticking watch from 20 feet away in a quiet room
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