Thursday, May 31, 2012

Three types of memory: procedural, episodic and semantic memory


Procedural memory

Procedural memory or coding of some acts of behavior (creation of dynamic stereotypes) is abilities of senso-motorics or abilities to achieve results by means of repetition. You can remember how to change gears in a car, go to your friend in the neighborhood, how to cook eggs and so on and so forth. This is memory of acquired skills that have become reflexive habits. This type of memory has big influence while learning by heart or creating inner automatism. This is implicit ability of memory for we often do not remember how we have learned this or that thing.  

Episodic memory

Episodic memory affects specific experiences. It helps to retain various personal experiences and events. It is some kind of autobiography, because we remember our past and various daily episodes. That’s why we know that you have to check if water is switched off before leaving home for a few days. This type of memory is not only important, because we have to remember what we did, but also to help us comprehend what we will have to do in the future. Let us say, each day I have to get up at six and go to work, or on Mondays and Wednesdays (at 18.00) I go to the local gym. 

Episodic memory helps us to get oriented in time and space. We are able to understand what happened in which place and when. These kind of experiences shape some kind of chronological order without us understanding when exactly it happened. Let’s say we can remember that we lost our key before we entered the university. We simply are aware that we had the key before that. Furthermore, episodic reminiscences renew our knowledge and supply information that we had acquired by means of semantic memory. 

Semantic memory

Semantic memory is a lot more important than semantic one, for it helps us to create broad and complex base of knowledge, forms our cultural and social essence and connects our general education and all possible knowledge about the world that surrounds us.  It encompasses management of words and concepts which become meaningful for our minds. It names the objects that surround us. 

Semantic memory divides meanings of words in to specific separate categories. We acquire most of our knowledge in hierarchical order. Semantic (meaningful) categories are sorted out to topics that are put into separate memory ‘rubrics’ that can be compared to library.

Organization of semantic memory

Semantic memory registers not signs of incoming signals, but cognitive representations. Semantic memory is a systematically organized, summarized and given sense to information giving base to human knowledge consisting of collections of words, concepts, rules and abstract ideas. It is necessary for language usage, so that we could speak fluently. For this purpose, a lot of authors studied verbal memory. There are a lot of theories that try to describe how knowledge is structured and organized in semantic memory.