But UNSW professor of psychiatry Gordon Parker says a re-analysis of the experiments used by Miller shows he missed the correct number by a wide mark. Parker says a closer look at the evidence shows the human mind copes with a maximum of four ‘chunks’ of information, not seven.
“So to remember a seven numeral phone number, say 6458937, we need to break it into four chunks: 64. 58. 93. 7. Basically four is the limit to our perception,” Parker said.