Peterson And Peterson(short Term Retention Of Individual

Question 1

Background

Answer 1

• Conducted laboratory experiment to investigate durations of short term memory

Question 2

Aim

Answer 2

To test true duration of short term memory

Question 3

Procedure

Answer 3

-24 students tested individuate
- each student asked to repeat outloud a set of letters they heard ( were three-diget numbers)
-immediately-they were asked to say out loud 3 digit number
- then count back in 3 or 4s from that number
- when signalled by red light,each student recalled the trigram(had to recall it 8 times in total)
- did this with delays of 3,6, 9,12,15 and 18 seconds
-In total repeated 48 times using different triaging

• 2nd experiment asked participants to do the same task but giving time to repeat trigram before counting backwards

Question 4

Results

Answer 4

• Longer each student had to count back, the less able they were to accurately recall the trigram.
• 3 seconds, 80%correct
• 18 sec, less then 10% correct
• in 2nd experiment found that extra time increased frequency of recall
• still showed similar decline over time

Question 5

Conclusion

Answer 5

• Information held in STM fades rapidly and only 10% recall after 18 sec

Question 6

Extraneous variable

Answer 6

• Variables that could affect result of study

Question 7

Mundane realism

Answer 7

Realistic everyday task

Question 8

Strength

Answer 8

-study is scientific as it can be replicated
- fixed timing
- limited noise
- good control

Question 9

Weaknesses

Answer 9

• Procedure lacked mundane realism
• not how we would typically use our memory i