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Forgetting, in psychology, is the inability to recall past experiences. It's more complex than memories simply fading over time. Theories suggest that memory traces, or engrams, may decay with disuse, but a clear neurochemical basis for this is still being researched.1

Interference theory proposes that established memories hinder the recall of new ones, but experimental evidence for this is not always strong. This theory also doesn't fully explain selective forgetting, such as repression, where distressing memories are pushed into the unconscious mind.12

Amnesia, a severe form of memory loss, can result from brain damage, particularly to the hippocampus, and may involve an inability to form new memories or recall past ones. Infantile amnesia refers to the common inability to remember experiences from before age three, possibly due to underdeveloped brain systems for memory encoding. Aging can also affect memory, with episodic memory (recalling specific events) often declining, while recognition abilities may remain intact.34

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