When participants recalled original list, it depended on the new list they had learnt. The most similar material produced the worst recall. This showed retroactive interference.
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What is interference?
Interference is when one memory blocks another, causing one or both memories to be forgotten.
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What is one strength of the interference theory?
McGeoch and McDonald used evidence from lab studies and showed that both types of interference are likely to be a common way we forget information from LTM. Lab experiments are controlled environments which means that it is likely to have validity.
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What is a weakness of the interference theory?
Interference is more likely to be tested in a lab than in real-life situations. The stimulus materials used are a list of nonsense words that have no meaning. Learning actual words is more realistic than learning nonsense/consonant syllables.
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