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32 Cards in this Set
- Front
- Back
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Threshold |
difference in how we can or can not percieve |
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absolute threshold |
smallest amount of stimulus energy needed to know the stimulus is present half the time. the smallest detectable level of a stimulus ex. the lowest the volume can be with still being able to hear it |
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just noticable difference threshold |
the smallest difference that you can detect in two different stimuli 50% of the time. ex. holding to things that are close to weighing the same |
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signal detection theory |
explains why we detect some sensory signals and not others |
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sensitivity |
competing information and the outside world |
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bias |
things going on inside the mind |
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correct rejection |
when the signal isnt there and you identify it isnt there |
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subliminal perception |
ability of brain to register everything that is going on around you with out focusin gon it or thinking about it its gone. |
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bottom up processing |
from your senses to your brain you are usually perceiving these for ther very first time (smaller kids) ex. getting close to a fire |
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top down processing |
brain to your senses guided by knowledge expectations and beliefs |
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preceptual set |
sum of a persons expectation and assumptions and how they will percieve it |
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amplitude= |
height |
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wavelength |
difference between the top of two |
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cornea |
protective layer around the eye that holds its shape |
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iris |
the muscle around the eye that controls how big the pupil gets. bigger the pupil= more relaxed |
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accomadation |
changing the shape of the lens to better focus on things |
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retina |
the organ of visual transduction has sensory neurons |
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cones |
allow for detail vision and color vision |
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rods |
specialized neurons for night vision |
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trichromatic theory |
vision arises becuase the primary colors involvin g three different types of cones red-long blue-short green-medium |
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opponent process theory |
opposing color combinations if one color is present it causes the opponet cells to not be able to see the opposing colors |
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negative after images |
brief period of time where you will percieve the shape in opposite color ex. camera flash |
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feature detectors |
percieves lines and edges and shapes |
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gestalts theory |
our mind is greater than the sum of its parts our mind tries to find meaning where there is none |
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ambiguous firgures |
two figures you see one or the other like the lady and the horse painting |
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subjective contours |
you see something when its not there because your brain is trained to like a triangle with a missing part you automatically see that it is there |
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pictorial depth cues |
drawings that make something look 3d |
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the most important aspect for vision |
depth perception |
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motion parralax |
motion based depth cue when you are in motion images of objects at different distances move across the retina at different rates |
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binocular |
less than 20 feet |
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cochlea |
like the retina it is the auditory transduction |
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basilar membrane |
haircells like the rods of the eye |
