Short Term Memory

Question 1

What is the capacity of STM?

Answer 1

• limited
• 7+ - 2
• miller

Question 2

What is the duration of STM?

Answer 2

-15-30 seconds
- Peterson & Peterson

Question 3

What is the coding for STM?

Answer 3

• acoustically
• Baddeley

Question 4

What did Miller do?

Answer 4

• Chunking

Question 5

What did Peterson & Peterson do?

Answer 5

• investigated how long information lasts in the STM when rehearsal is prevented
• lab experiment
• pps shown trigram
• asked to count backwards in 3s
• after intervals pps asked to recall trigrams
• 80% accurately recalled after 3 seconds
• less than 10% accurately recalled after 18 seconds
• lacks ecological validity: recalling meaningless information

Question 6

What did Baddeley do?

Answer 6

• did an ethics briefing
• pps shown 4 sets of 10 works, each word shown for 3 seconds
• at the end of each set, pps attempted to recall each word in the order shown
  Set 1: acoustically similar
  Set 2: acoustically dissimilar
  Set 3: semantically similar
  Set 4: semantically dissimilar
• pps had difficulty recalling acoustically similar words in STM but not LTM
• pps had difficulty remembering semantically similar words in LTM and not STM