Interference theory is a concept in psychology that explains how memories can be disrupted by other information. It suggests that when new information is learned, it can interfere with the retrieval of existing memories, leading to forgetting. This interference can occur in two main forms: proactive interference, where old memories hinder the recall of new ones, and retroactive interference, where new information makes it difficult to remember old memories. This theory is important for understanding how memory works and why we sometimes forget things. It highlights the complexity of memory processes and the role of cognitive psychology in studying how different types of information can compete for our attention and recall.