Underwood and Postman (1960)

Question 1

What was the method?

Answer 1

• Both groups were given a list of paired words to learn.
• The experimental group was given another list where only the second word changed.
• The control group weren’t given a second list.
• They were tested their recall of the first list by being prompted by the first word.

Question 2

What were the results?

Answer 2

Recall was better in the control group.

Question 3

What was concluded?

Answer 3

Retroactive interference had affected the second group’s recall.