Duration Flashcards
Define duration
The length of time info is stored
Duration experiment
Peterson and Peterson 1959
Bah Rick et al 1975
Peterson and Peterson experiment
24 students were given to a constant syllable to remember and 3 digit number
Asked to count backwards from the 3 digit number until stopped
Stopping at different times(3 seconds)
Peterson and Peterson findings
STM has a very short duration unless repeated regularly
Limitation of experiment (p&p)
It is an artificial stimulus
Study lacked external validity
Bahrick experiment
392 Americans aged 17-74
Recognition test: 50 photos from high school yearbook
Free recall test: pp listed names of their class
Bahrick findings
Pp 48 years after graduation were 70% accurate in photo recognition
Free recall was not as accurate
Strength of bahrick experiment
Had high external validity