capacity

Question 1

How did jacobs figure out digit span?

Answer 1

-he read out 4 digits and partipant recalls these out loud in correct order
-if correct, he read then read out 5 digits until the particpant couldnt recall the order correctly anymore
-indicates their digit span

Question 2

what did jacobs find from the sutdy?

Answer 2

-mean span for digits across all Ps was 9-3
-mean span for letters was 7-3

Question 3

what did miller find on span of memory and chunking?

Answer 3

-he noted things come in sevens
-e.g days of the week, musical scale
-suggested the span of STM i.e capacity is 7 plus or minus 2
- he also noted people can recall 5 words as easily as 5 numbers
-and this is done by chunking (group letters or numbers)

Question 4

strenghths of jacobs study?

Answer 4

-valid
-has been replicated
-early research in psych lacked adequate control e.g some Ps digit spans perhaps underestimated bc they were distracted e.g EVs
-jacobs findings were confirmed however by controlled studies e.g Bopp and verhaegen
-gives valdity to jacob

Question 5

limitations of millers study?

Answer 5

-overestimated STM capapcity
-Cowan reviwed other research and found that STM is only about 4 plus or minus 1 chunks