Conclusion and conclusions on short-term memory ability research Jacobs led the first organizational research on short-term memory in 1887 by developing a technique called Memory Span. Jacobs discovered that the average short-term memory range is from 5 to 9 items. This is called "Magic Number 7 Plus 2". He also found out that letters were not remembered and figures. There are individual differences, and it ranges from 5 to 9.
Since we have technology, let's talk about two memories: long-term memory and work memory. You may have heard about long-term memory and short-term memory, but cognitive psychologists call short-term memory "working memory". There is a difference in the concept of short-term memory and work memory, but these two are exchangeable for non-experts. Working memory acts as a "scratch pad" for processing information. Work memory is the place where "thinking" is done. Working memory is obtained by sensing information from the outside world or by taking it out by retrieving it from long term memory and by considering it. Working memory has three important things: it has limited capacity for a limited period, and is very unstable.
Short-term memory is also called working memory. Short-term memory expects a few seconds to one minute without rehearsal. Its ability is also very limited. When George A. Miller (1956) worked at Bell Laboratories, he experimented and proved that the memory of short-term memory is 7 ± 2. Modern short-term memory capacity estimates are low, usually 4-5, but you can increase memory capacity with a process called blocking. When numbering, you can divide numbers into three groups: the first group, the area code (such as 123), the 3-digit array (456), and finally the 4-digit array (7890) . It is more efficient to memorize a 10-digit string because it allows information to be divided into meaningful groups of numbers.