Peterson and Peterson

Cards (6)

what did Peterson and Peterson(1959) research
duration of STM
procedure of Peterson and Peterson
tested 24 students in 8 trails each
on each trail the student was given a consonant syllable and a 3-digit number to count backwards from (prevents mental rehearsal)
on each trail they were given a different time period:3,6,9,12,15,18
findings of Peterson and Peterson
3 seconds= 80% average recall
18 seconds= 3% average recall
what did Peterson and Peterson's findings suggest
suggests that STM duration is 18 seconds (unless information is repeated/ rehearsed)
strengths of Peterson and Peterson
high internal validity (controlled)
supports multi-store model of memory
limitations of Peterson and Peterson
artificial stimulus
lacks ecological validity