Psychological Review of Miller G.A.'s: "The magical number 7 plus or minus two: Some limits on our capacity for processing information."

George Miller explains that first, the span of absolute judgment and the span of immediate memory require strict limitations on the amount of information that we are able to receive, process, and remember. By organizing the stimulus input all together into several dimensions and successively into a sequence or amount, we manage to break this information in order to remember and process it later. Miller is saying that there is often far too much stuff …

…enhance and expand the amount of information we are able to process. Miller has suggested that '7' has been an important figure throughout history, by identifying that many issues such as the days of the week and the deadly sins, occur in groups of 7's. He does highlight that this maybe coincidental, but also leaves it open for inquiry, as to whether there is an underlying reason for why these things happen in 7's.