Sensory memory holds an information about 1 seconds after it is perceived. It is automatic response which is out of cognitive control. It passes information into nervous system. Unless the information is not passed into short-term memory the information may be loosed. The sensory memory also two types:
i)Iconic S.M: It related with visual/image information.
ii)Econic S.M: It is related with audio information.
It is also known as working memory. It allows recall for a several seconds to a minute without rehersal. Modern estimate of short term memory can be increased by chunking method of information at least 4-5 items.
Information that makes its way from short term memory to long term memory, enters to a store space of almost unlimited capacity. The information that is stored in long term memory can be retrieved when we need it.