Memory - Duration - Bahrick Flashcards
When ?
1975
Who ?
Bahrick et al
Participants ?
studied participants between the age of 17-74
what did Bahrick use for recall ?
High School Yearbooks
What is photo recognition ?
Tests consisting of 50 photos.
What is free recall ?
Participants had to recall the names of all the people in their graduate class
Findings - Photo recognition within 15 years
90% accurate
Findings - photo recognition after 48 years
70% accurate
Findings - free recall after 15 years
60% accurate
Findings - free recall after 48 years
30% accurate
conclusion ?
Long term memory can last up until a lifetime.
why did it have high external validity?
used meaningful memories - high school yearbooks.
What did Shepard (1967) find ?
When research had been conducted using meaningless pictures recall rates tend to be lower.
What are some confounding variables ?
The participants may have looked over their high school yearbooks over the years and therefore rehearsed their memory.