Underwood (1957)

Question 1

What was studied?

Answer 1

The results of studies into forgetting over a 24-hour period.

Question 2

What was the recall for someone if they had previously learnt 15 or more word lists during the same experiment, after a day?

Answer 2

20%

Question 3

What was the recall for someone if they hadn’t learnt any earlier lists, after a day?

Answer 3

80%

Question 4

What was concluded?

Answer 4

Proactive interference from the earlier lists affected the participants’ ability to recall the later ones.