Pererson And Peterson :duration Short Term Memory Flashcards
What was the aim
To investigate duration in STM
Who was involved ?
24 undergraduate students
What were ppts presented ?
A constant Triagram to remember
To prevent rehearsal what was done ?
They were given a 3 digit number and told to count back
After 3 seconds what happened ?
Only 80 percents of ppts recalled the trigram correctly
After 18 seconds what happened ?
10 percent recalled correctly
Conclusion
STM lasts 18-30 seconds unless rehearsed
Weakeness Peterson Peterson STM
Lack mundae realism
As task to recall trigrams in artificial
As research does not reflect real life memory activities
This lowering external validity
Strength of Peterson Peterson duration of STM
High reliability
Done in controlled environment
Can be repeated in same environment
Increased internal validity
