MCAT

Proactive vs Retroactive Interference - MCAT Psychology

Written by medschoolcoach | Jun 25, 2025 8:23:58 AM

 


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Proactive Interference


Proactive interference occurs when older memories interfere with the retrieval of new memories. For example, let’s say a pool of subjects is divided into two groups. One group is tasked with only memorizing a list of mammals, and the other group is tasked with first memorizing a list of trees, but then also memorizing the same list of mammals. We can predict that participants in the second group will be worse at memorizing and recalling the list of mammals because they have recently encoded other information, disrupting the process of encoding new memories.

Retroactive Interference


Retroactive interference occurs when you learn new information that disrupts the retrieval of old information. For example, say you memorized a new phone number. Learning that new phone number might make it more difficult to recall your old phone number. The new information is retroactively interfering with your old memory.