Study Notes on Memory and Amnesia

Memory Disorders and Mechanisms

Anterograde Amnesia

  • Definition: An inability to form new memories.

  • Implications: Individuals with anterograde amnesia cannot create new long-term memories. This condition often results from brain injury, diseases like Alzheimer’s, or psychological trauma.

Retrograde Amnesia

  • Definition: An inability to retrieve information from one’s past.

  • Implications: Individuals may lose memories of events that occurred prior to the onset of amnesia. This can affect self-identity and personal history.

Interference in Memory

Proactive Interference

  • Definition: The forward-acting disruptive effect of older learning on the recall of new information.

  • Examples: When past knowledge interferes with the ability to learn new material, such as using old passwords instead of current ones.

Retroactive Interference

  • Definition: The backward-acting disruptive effect of newer learning on the recall of old information.

  • Examples: New learning, such as a new phone number, makes it difficult to remember an older phone number.

Psychoanalytic Concepts

Repression

  • Definition: In psychoanalytic theory, repression is the basic defense mechanism that banishes from consciousness anxiety-arousing thoughts, feelings, and memories.

  • Implications: This mechanism serves to protect the individual from psychological pain or distress associated with certain memories or thoughts.

Memory Retrieval Processes

Reconsolidation

  • Definition: A process in which previously stored memories, when retrieved, are potentially altered before being stored again.

  • Implications: This suggests that memories are not static; they can change each time they are recalled, influenced by new information or context.

Memory Distortion Effects

Misinformation Effect

  • Definition: Occurs when misleading information has distorted one's memory of an event.

  • Consequences: This phenomenon is significant in legal contexts, as it can lead to false testimonies or wrongful convictions.

Source Amnesia

  • Definition: Faulty memory for how, when, or where information was learned or imagined (also called source misattribution).

  • Connection to Misinformation Effect: Source amnesia, along with the misinformation effect, is at the heart of many false memories.

Phenomena Related to Memory

Déjà Vu

  • Definition: The eerie sense that "I've experienced this before."

  • Mechanism: Cues from the current situation may unconsciously trigger retrieval of an earlier experience, leading to a feeling of familiarity without conscious recollection of the earlier event.