Memory & Forgetting Study Notes

Examination of human learning methodologies as integral to education.
Cognition goes beyond mere information retrieval, showing a holistic study of the mind.
- Neisser (1967) defined cognition as studying how people encode, structure, store, retrieve, and use knowledge.
Cognitive psychology introduces an intervening variable or set of variables that bridge environment and behavior, contrasting behavioral theories.

Organization of human memory:
- Sensory Memory
- Brief retention of sensory information.
- Short-Term Memory (STM)
- Holds information from seconds up to a couple of minutes.
- Long-Term Memory (LTM)
- Unlimited capacity and duration; less likely to be lost.
Types of Memory:
- Sensory Memory:
- Iconic Memory
  - Brief storage of visual information (e.g., visual images).
- Echoic Memory
  - Brief storage of auditory information.
- Short-Term Memory:
- Working Memory
  - Used in immediate tasks.
- Declarative Memory (Explicit/Conscious):
- Episodic Memory
  - Memories of specific experiences tied to time and context.
- Semantic Memory
  - Factual information without time/context ties.
- Nondeclarative Memory (Implicit/Unconscious):
- Procedural Memory
  - Memory of skills and actions.
- Priming
  - Exposure to one stimulus influences response to another.
- Classical Conditioning
  - Learning through association.
- Non-associative Memory
  - Change in response to a stimulus after repeated exposure.

Importance of memory organizations in understanding learning.
- Various methodologies employed by educators stem from cognitive research.

Sensory Store:
- Critical for initial information capture; includes iconic and echoic stores.
- Iconic Store: Visual information stored for very short periods.
- Example: Visualization persists after the sparkler is removed.
- Echoic Memory:
- Raw auditory data sent via electrical signals to the brain, stored in the primary auditory cortex.
- Each type holds short data bursts unless attended to for transfer.
Atkinson & Shiffrin Model:
- Memory flow proposed to follow pathways through sensory, short-term, and long-term stores.

Sound is interpreted and transmitted to the auditory cortex with brief retention.
- Information is retained in opposite hemispheres based on ear perception.
- Later processed into short-term memory for meaning.

George Sperling (1960):
- Conducted experiments showing that participants could recall certain letters briefly displayed, thus demonstrating fleeting visual memory's capacity.

Short-Term Memory Characteristics:
- Holds information up to about 30 seconds without rehearsal.
- Acoustical storage dominates over visual storage.
- Capacity circa 7 items ( $7 ext{ +/- } 2$ ) as established by Miller (1956).
Chunking Method:
- Allows memorizing larger amounts through meaningful associations; demonstrates the flexibility of memory when grouped logically.

Luck & Vogel (1997) and related studies indicated around four items could be held in visual memory, regardless of characteristics like color and orientation.
Memory focuses on object capacity rather than spatial location.
American Sign Language studies found similar outcomes with signed letters correlating with visual memory properties.

Types of Long-Term Memory:
- Declarative Memory:
- General knowledge, e.g., facts and figures.
- Procedural Memory:
- Skills-based learning, like riding a bike or swimming.
- Episodic Memory:
- Specific events in time and space.
- Semantic Memory:
- Knowledge of meanings without specific time markers.

Penfield (1955, 1969) discovered temporal lobe stimulation could stimulate vivid recollections, suggesting permanence in long-term memories, but faced critique for limited instances and reliability.
Schmidt et al. (2000) focused on permastore, a long-lasting retention of knowledge despite time elapsed.
Investigations revealed that recognizing names, particularly from high school, remained notably enduring even decades later.

Baddeley & Hitch (1974) proposed a complex model combining central executive, phonological loop, and visuospatial sketchpad, later introducing episodic buffer.
Highlights the dynamic nature of short-term memory and feasibility for complex tasks.

Visuospatial Sketchpad: Holds visual images.
Phonological loop: Manages auditory data with subvocal rehearsal and phonological storage.
Central Executive: Directs attention and integrates processes from additional components, linked with higher reasoning functions.
Episodic Buffer: Merges various information types for coherent memory processing.

Strengths:
- Multi-component nature extends beyond the simplistic short-term model.
- Supported by various experimental evidences like KF case study revealing distinct verbal and visual memory systems.
Weaknesses:
- Overlap in function and lack of clarity in the role of the central executive.
- No comprehensive account for long-term systems or variations over time.

Distinction between semantic and episodic memory systems through cognitive research and clinical observations.
HERA Model indicates brain region differences for processing; left for semantic tasks; right for episodic recall.

Levels of Processing Model (Craik and Lockhart, 1972):
- Proposes depth of processing as crucial for memory retention quality; deeper processing yields better recall.
Considerations leading to the self-reference effect underlie advantages in memories linked to personal relevance.

Networking principle: memory stored in multiple locations across the brain through interconnected units.
Information influences connection strength, enhancing memory retention through elaborate association.

Critical cases, e.g., H.M., underscore the involvement of the hippocampus and surrounding structures in long-term memory formation and issues arising from surgical interventions.
Insights from animal studies and human comparisons illuminate the layered complexities of memory functioning within the temporal lobe architecture.

Attention to long-term potentiation (LTP) mechanisms and potential pharmaceutical enhancements for memory.
The role of stimulants, such as caffeine and amphetamines, is debated regarding efficacy and long-term use consequences.

Aged memory transitions: peak capacity in 20s, gradual decline evident from the 50s onward.
Factors like neurogenesis in the hippocampus, situational depression, and the role of emotional contexts in memory practices significantly impact retention and recall.

Considerations on false memories and eyewitness recall underline severe impacts on legal practices and public safety.
The complexity of memory presents challenges in addressing misconceptions and biases tied to personal experiences rooted in societal narratives.

Understanding memory constructs remains an evolving field shaped by ongoing research. Strategies for improvement and holistic learning methods reflect cognitive insights crucial for educational advancements and psychological wellbeing.