Comparing Theories of Forgetting | AI Learning Guide

When comparing theories, interference and retrieval failure have the strongest evidence. Decay is intuitive but hard to prove. Motivated forgetting is interesting but debated. In practice, forgetting is usually a mix of several factors, not just one.

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Theories at a Glance

Decay

Memory fades over time
Limited support

Interference

Competition from other memories
Strong support

Retrieval Failure

Insufficient cues
Strong support

Motivated Forgetting

Conscious or unconscious suppression
Controversial

Which Theory Wins?

No single theory explains all forgetting. Interference and retrieval failure are the most widely supported, while decay plays a minor role and motivated forgetting is more controversial.