1. Short-term memory is viewed as a rapidly decaying system. Most psychologists believe that short-term memory does not involve permanent changes in the brain. However, some temporary changes occur in this case. The physiological nature of the traces is such that they fade quickly. The long-term memory appears to be permanent. A permanent change occurs in our brain when we remember things for a longtime. Long-term memory has a more or less enduring impression on the brain. Because of the consolidation of traces, the traces are relatively permanent.

2. Short-term memory has limited storage capacity resistant to overcrowding in any form. It just cannot take any overload. On the other hand, long-term memory is limitless for all practical purposes. Any information transferred from short-term memory to long-term memory will have a place for permanent storage.

3. Short-term memory is an active system involving rehearsal. We need to keep the items actively in STM relearning them constantly. On the other hand, the long-term memory is rather passive in nature; it is not easily disturbed by interruption, unlike short-term memory.