Flashcards in Visual and Auditory Recognition (Chpt.2) Deck (22):
Motor Theory (MT)vs. General Mechanism (GM)
MT: A phonetic module connects hearing to the language motor system. GM is know the most accepted theory
GM: Speech sounds are heard the same way as other sounds
each phoneme category is signaled by many features phoneme categories (PC) are perceived extremely efficiently. MT support PC originally found only in humans and only with speech sounds. GM support PC later found in animals and non-speech sounds
Vision and hearing knowledge in a variety of ways to perceive the world.
uses previous knowledge to gather and interpret the stimuli registered.
Object Recognition or Pattern Recognition
you identify a complex arrangement of sensory stimuli, and you perceive that this pattern is separate from its background.
is the actual object that is out there in the environment
is the information registered on your sensory receptors for example the image that your pen creates on your retina
covers the inside back portion of your eye it contains millions of neurons that register and transmit visual information from the outside world
is a large capacity storage system that records information from each of the senses with reasonable accuracy
Iconic memory or visual memory
preserves an image of a visual stimulus for a brief period after the stimulus has disappeared
Primary visual cortex
is located in the occipital lobe of the brain it is the portion of your cerebral cortex that is concerned with basic processing of visual stimuli. It is also the first place where information from your two eyes is combined
is that humans have basic tendencies to organize what they see without any effort we see patterns rather than random arrangements
has a distant shape with clearly defined edges
is the region that is left over forming the background
Ambiguous figure-ground relationship
the figure and the ground reverse from time to tie so that the figure becomes the ground and then becomes the figure again
we see edges even though they are not physically present in the stimulus
Feature Analysis Theories
propose a relatively flexible approach, in which a visual stimulus is composed of a small number of characteristic is called a distinctive feature
Recognition by components theory
is that a specific view of an object can be represented as an arrangement of simple 3-d shapes called geons.
Viewer centered approach
this approach proposes that we store a small number of views of three dimensional objects, rather than just one view
emphasizes that the stimulus characteristics are important when you recognize an object notice its shape, size, color, and other physical characteristic
Top down processing
emphasizes how a person's concepts, expectations, and memory can influence object recognition
Because we overuse top down processing we sometimes demonstrate change blindness we fail to detect a change in an object or a scene