1. sensory memory holds info that is taken from environmental stimuli (held in sensory memory for 1 or 2 seconds)2. we process info in sensory memory than we consciously notice 3. info is sensory memory is picked up by a persons senses 4. Echoic memory 5. iconic memory 6. George sperling conducted the first type of research on iconic memory. He found that people could remember 9 letters that the flashed on a screen, but iconic memory was too brief causing them to only recall half of them.

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