stm

• How is stm coded?

  Mainly acoustically - rely on verbal differentitation
• What is the research to support that stm is encoded mainly acoustically?

  Baddeley:

  asked to recall 4 lists of words immediately after seeing

  = worst remembered is acoustically similar because of the merging of similarity sounding words

  Strength - reliability / Weakness - low ecological validity
• What is the duration of stm?

  18-30 seconds
• What is the research to support stm has a duration of 18-30 secs?

  Peterson & Peterson

  trigrams that have to be recalled at different retention intervals

  3% at 18 secs

  Strength - reliability / Weakness - lack external validity
• What is the capacity of stm?

  7+/-2 (5-9 items)
• What is the research that supports the capacity of stm being 7+/-2 ?

  Miller

  chunking - group things together into meaningful pieces to increase the amount we remember

  remember things in 7s hence 7+/-2

  Strength - internal validity / Weakness - reliability