What is retrieval failure theory?

Retrieval Failure can occur for at least four reasons. Interference Theory which states that we forget not because memories are lost from storage but because other information gets in the way of what we want to remember. Decay Theory states that when something new is learned, a neurochemical memory trace is formed, but over time this chemical trail tends to disintegrate; the term for the phenomenon of memories fading with the passage of time is transience. Motivated forgetting, which occurs when people want to forget something is common when a memory becomes painful or anxiety laden, as in the case of emotional traumas such as rape and physical abuse. Amnesia the physiologically based loss of memory; can be anterograde, affecting the retention of new information or events; retrograde, affecting memories of the past but not new events; or both. (king 2008)