Research on duration of LTM (Bahrick)

Question 1

How many participants took part in Bahrick’s research?

Answer 1

392 Americans

Question 2

In what 2 ways did Bahrick test recall?

Answer 2

1) A photo-recognition test consisting of 50 photos, some from the participants’ high school yearbook
2) A free recall test where they had to recall the names of their graduating classmates

Question 3

Participants that were tested within 15 years were _% accurate in photo recognition

Answer 3

90%

Question 4

After 48 years, recall declined to about _% for photo-recognition

Answer 4

70%

Question 5

Was free recall less accurate than photo recognition?

Answer 5

Yes

Question 6

After 15 years of graduation, free recall of names was around _%

Answer 6

60%

Question 7

After 48 years, free recall of names dropped to _%

Answer 7

30%

Question 8

What does Bahrick’s research show?

Answer 8

That LTM may last up to a lifetime for some material

Question 9

What is the strength of Bahrick’s research?

Answer 9

+ It has high external validity as they were investigating meaningful memories