worked extensively with a college student for well over ayear, increasing his capacity to remember digit strings (e.g., 982761093 . . .). Asexpected, at the outset he could remember only about seven numbers. Afterpractice, he could remember 70 or more; see Figure 3.1. How? Did he developa general skill analogous to strengthening a “mental muscle?” No, what hap-pened was that he learned to use his specific background knowledge to “chunk”information into meaningful groups.
This reminds me a lot of Elaboration from last week's reading. It's as though we assign a meaningful idea to a string of numbers, a skill, or a bit of information to help commit it to memory. This helps me remember things, so it is no surprise to me that it helps others, even transitioning from almost 40 years ago to now, in the age of technology. In middle school, I participated in a study which included a test like this, without the practice, and I remember being above average, but I distinctly remember that after the results were published, that the average was about seven.