multi store model part 2

Question 1

STM capacity

Answer 1

Jacobs 1887 digit span task
pps presented with 4, 5, digit numbers and asked to recall
miller summarised research and proposed the number 7+/- 2 items
more than 7 individual letters can be remembered by using a process called chunking

Question 2

STM duration

Answer 2

Peterson and Peterson (1959)
counting backwards prevented rehearsal so less maintaince of stm

they found the longer the interval between the trigram and recall the less accurate recall
18-30 seconds

Question 3

How is STM coded

Answer 3

STM is coded acoustically
Baddeley (1956)

Question 4

What did Baddeley 1956 do + findings

Answer 4

Made groups 1-4
group 1 - acoustically similar
group 2 - acoustically dissimilar
group 3 - semantically similar
group 4 - semantically dismilar

Acoustically similar performed the worst suggesting that STM is encoded acoustically because when sounds presented overlap it causes acoustic confusion as stm only pays attention to the sound not the meaning

Question 5

LTM encoding

Answer 5

Baddeley (1966)
same study but repeated list after twenty minutes testing long term memory
Group 3 - semantically similar list performed the worst (causing difficulty)
Long term memory is predominately encoded semantically , long term memory pays attention to meaning rather than sound

Question 6

LTM Duration (1975)

Answer 6

Bahrick et al (1975)
High school students were shown the names and pictures of their classmates from high school year books, memory tasks wereperformed

Question 7

Bahricks findings in relation to long term memory duraiton

Answer 7

Photo recognition within the last 15 years 90% accurate and only declined to 70% if graduated 48 years ago which illustrates that long term memories can last up to life time

Question 8

LTM capacity

Answer 8

no research to date has been able to find a limit to long term memory capacity.