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Interference vs. Decay Demonstration
Langston, Cognitive Psychology
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Instructions You are going to see lists of numbers.
Pay attention to the numbers and try to remember them. When a list ends, you will be told a target item. Write down the number that came after the target item.
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Instructions We’ll practice…
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8
5
6
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2
7
7
8
5
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***END OF LIST*** 6
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Distance = 3 (answer = 2)
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Get ready!
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9
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8
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1
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4
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3
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5
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7
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6
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2
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***END OF LIST*** 3
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Distance = 4 (answer = 5)
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Get ready!
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6
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9
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2
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7
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5
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8
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3
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4
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1
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***END OF LIST*** 2
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Distance = 6 (answer = 7)
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Get ready!
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6
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9
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8
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3
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1
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7
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4
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2
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5
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***END OF LIST*** 2
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Distance = 2 (answer = 0)
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Get ready!
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2
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8
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5
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4
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3
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1
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7
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6
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9
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***END OF LIST*** 4
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Distance = 6 (answer = 3)
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Get ready!
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3
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2
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5
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4
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9
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1
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7
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***END OF LIST*** 0
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Distance = 2 (answer = 1)
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Get ready!
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4
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1
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2
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7
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9
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6
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3
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5
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***END OF LIST*** 8
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Distance = 4 (answer = 9)
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Discussion How does the manipulation affect your ability to recall the digits? Distance from the end of the list (amount)? Rate?
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Discussion Waugh & Norman (1965): Individual data. Note how much more distance is affecting the results. Waugh & Norman (1965, p. 91)
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Discussion Waugh & Norman (1965): Collapsed data. “…it is clear that the effect of rate is relatively small compared to the effect of serial position” (p. 91). Waugh & Norman (1965, p. 91)
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End Interference vs. Decay Demonstration
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