Memory: the capacity of the ns to acquire and retain useable skills and knowledge. A story that can be altered through retellings. Sensory memory is brief: temporary sensory buffer. Allows us to experience memory as a stream: visual: iconic memory, auditory: echoic memory. Short term memory is active: a limited capacity memory system that holds information is awareness for brief periods of time. Approx 20 seconds unless you prevent it: repetition, chunking. Memory span: stm generally limited to 7 items, plus or minus two. The ability to chuck efficiently relies on our ltm. Stm as working memory: stm not a single storage system but rather an active processing unit that deals with multiple types of information such as sounds, images and ideas, wm: an active processing system that keeps information available. Central executive: encodes information from the sensory systems and then filters imp info to ltm.