about human memories:

indeed, much of our everyday activity relies on memory. as well as storing all our

factual knowledge, our memory contains our knowledge of actions or procedures.

senses. it also gives us our sense of identity, by preserving information from

our past experiences.

the sensory memories act as buffers for stimuli received through the senses. a

sensory memory exists for each sensory channel: iconic memory for visual stimuli,

echoic memory for aural stimuli and haptic memory for touch. these memories are constantly overwritten by new information coming in on these channels.

short-term memory or working memory acts as a ‘scratch-pad’ for temporary recall of information. it is used to store information which is only required fleetingly.

long-term memory is intended for the long-term storage of information.

information is placed there from working memory through rehearsal. unlike working

memory there is little decay: long-term recall after minutes is the same as that

after hours or days. there are two types of long-term memory: episodic memory and semantic memory.

episodic memory represents our memory of events and experiences in a serial form.

semantic memory, on the other hand, is a structured record of facts, concepts and skills that we have acquired.