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THE HUMAN MEMORY Memory is an information processing system Websters dictionary explains Memory as the faculty by which sense impressions and information are retained consciously or unconsciously in the mind and subsequently recalled A great professor by the name of Michael Gibbons stated that Memory is any indication that learning has persisted over time There are generally three types of memory sensory memory short-term memory and long-term memory Sensory memory is the first level of memory Sensory memory retains the brief impression of a sensory stimulus after the stimulus itself has ended An example of sensory memory is when you see an object then the object disappears but it still may be vivid in your memory The sensory memory holds a short impression of sensory information even when the sensory system does not send any information anymore Most research has focused on the visual and auditory systems although there are most likely sensory registers for all our sense A sensory memory exists for each sensory channel iconic for visual echoic for hearing stimuli and hapitc for touch Its hard to determine how much information sensory memory can hold because the information is always fading as scientists try to measure it George Sperling first studied iconic memory He showed subjects sets of letters and asked them to name as many letters as they could remember Sperling flashed the cards quickly and asked the subjects to remember the letter on the card The subjects later could recall 3-4 cards but not all George Sperling determined that the memory was lost over the short period of time that lapsed He also came to the conclusion that the information that we pay attention to is the ones that move on to further processing Information that we dont pay attention to is not likely to move on for further processing Information passes from sensory information storage into short-term memory where again it is held for only a short period
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