Study Notes on Explicit vs. Implicit Memory

Definition of Explicit Memory
- Also known as declarative memory.
- Refers to memories that can be consciously recalled.
- Examples include recalling vocabulary terms or personal experiences.
Definition of Implicit Memory
- Also referred to as non-declarative memory.
- Includes things that cannot be consciously recalled but can influence behavior and instincts.
- Involves conditioned reflexes or emotional responses, such as déjà vu moments.

Explicit Memory Processing
- Primarily processed by the hippocampus in the limbic system.
- Involves the recall of facts and learned vocabulary.
Implicit Memory Processing
- Linked to regions such as the amygdala and cerebellum.
- Generally not under conscious awareness.

Muscle Memory
- Refers to skills that become automatic through practice and experience.
- An example includes knowing how to ride a bike without conscious recollection.
Case Study: Patient with Hippocampal Lesions
- A man who had his hippocampus destroyed due to severe epilepsy.
- Resulted in anterograde amnesia, where he could not form new declarative memories after the surgery.
- He retained the ability to recall memories prior to the surgery.
Learning New Skills Despite Amnesia
- Despite his inability to recall new information, he showed improvement in the game "Tower of Hanoi."
- His proficiency improved over time, indicating new procedural memory formation despite having no conscious memory of learning it.

Explicit vs Implicit Memory
- Explicit (Declarative): Conscious recall of facts/events.
- Implicit (Non-Declarative): Unconscious learning and reflexive actions.
Further Division of Explicit Memory
- Semantic Memory
- Memory for facts, without a specific time reference.
- Example: Knowing that grass is green without recalling when that was learned.
- Episodic Memory
- Memory for events in personal life.
- Example: Recalling a specific birthday celebration.
- Prospective vs Retrospective Memory
- Prospective: Memory for future tasks.
- Retrospective: Memory for past events.

Encoding and Forgetting
- Information must be encoded into sensory memory, then working memory before being stored in long-term memory.
- Ineffective encoding leads to memory failure.
Forgetting Curve by Ebbinghaus
- Describes the rate at which information is forgotten over time.
- Initial rapid loss followed by a leveling off.
- Up to 75-80% of new information can be forgotten shortly after learning.
Interference in Memory Retrieval
- Proactive Interference
- Previously learned information interferes with the recall of new information.
- Example: Learning French being hindered by prior knowledge of Spanish.
- Retroactive Interference
- New information disrupts recollection of old information.
- Example: Learning a new phone number makes it hard to recall an old number.

Flashbulb Memories
- Memory for significant emotional events, believed to be vivid and detailed.
- Example: Recollection of major historical events like 9/11.
- Studies show that despite emotional significance, the details may also be forgotten at the same rate as mundane memories.

Definition and Implications
- Misinformation can lead to altered recollections of events.
- Suggestive questioning can create false memories.
- Example: Eyewitness accounts skewed by misleading terminology.
Study: Car Collision Experiment
- Participants watched a video of car accidents.
- Different verbs used in questioning (hit vs smashed) significantly affected participants' recall of details, including false claims of broken glass.

The complexity of memory involves many systems, processes, and influences that affect recall.
Understanding these can improve learning strategies and help mitigate memory failures.
Encouragement to apply memory techniques in studying and retaining important information.