Coding Capacity And Duration Flashcards
What is coding
How memory is stored in different stores
What was the research for coding
Baddley
4 groups - acoustically similiar and dissimilar , semantically similiar and dissimilar
Sound stm coded acoustically and ltm coded semantically
Strength of baddleys research coding
Identified clear difference of the 2 memory stores
Limitation of baddleys research
Used artificial stimuli therefore low external validity
What is capacity
Amount of info that can be stored
What is the research for capacity
Jacobs digit spans
Miller chunking
What was Jacob’s capacity findings
- average was 9.3 digits or 7.3 letters remembered
What was millers capacity findings
7+/- 2 items rmebered
What’s a strength of Jacob’s research
Replication of findings in other research so valid
What was a limitation of millers research
May have overestimated capacity of chunking
Cowan - 4 +/-1
What is duration
Length of time information can be held in memory
What’s the research on stm duration
Peterson
- given triple consonants to remember whilst counting backwards for 18,15,12 etc seconds (retention period)
What were Petersons findings (stm duration )
After 3 seconds -80% recall
After 18 seconds - 3% recall
STM max is 18 seconds
What’s the research for LTM duration
Bahrick
Yearbook photos - free recall and photo recognition
What were bahricks findings
Photo recognition - 15 years 90% accuracy , 48 years - 70% accuracy
Free recall - 60% after -15 years, 30% in 48 years
Ltm may be forever
