Stm, Ltm

Question 1

Capacity of stm is

Answer 1

5-9 pieces, this is Millers idea that things come in groups of 7

Question 2

The digit span experiment

Answer 2

Jacob’s carried this out to establish the capacity of stm
- he gave ppts a number of digits
- they were required to repeat these out loud
-if they repeated the amount of digits correctly one more was added
- they did this until failure

Question 3

What is the duration of stm

Answer 3

18-30 seconds demonstrated by Peterson et al

Question 4

Peterson and Peterson study

Answer 4

-24 undergraduates each took part in 8 trials
-in each trial ppts were given a constant trigram (cvc) to remember but also a three digit number
-ppts were then told to count backwards from that 3 digit number until they were told to stop either after 3,6,9,12,15 or 18 seconds

Question 5

The findings of Peterson and Petersons study

Answer 5

After 3 seconds 80% of the trigrams were recalled correctly
After 6 seconds this fell to 50%
After 18 seconds less than 10% of the trigrams were recalled correctly

Question 6

The duration of ltm

Answer 6

Unlimited as shown by Bahrick et al, found that photo recognition of graduating classmates of the 396 ppts decreased from 90% to 70% between 15 years and 46 years of graduating

Question 7

What is the coding of stm

Answer 7

Coding is acoustic in stm

Question 8

What is the coding of ltm

Answer 8

Semantically, if things have meaning we remember them for longer

Question 9

Who demonstrated the different coding in stm and ltm

Answer 9

Baddeley

Question 10

What did baddeley find out in his research

Answer 10

He found that more mistakes were made by ppts than when recalling acoustically similar words straight after learning them, whilst more mistakes were made when recalling semantically similar words 20 mins after learning them