How did Jacobs find out what the capacity of the STM was?
Measuring digit span
What did Jacob find the mean digit span was across participants?
9.3 items
What did Jacobs find the mean letter span was across participants?
7.3
How did Jacobs use the digit span?
Researcher reads out four digits and the participants recalls these out loud in the correct order; researcher gradually increases total until participant can't recall the order
