Study Notes on Memory Types and Processes

Overview of Memory Types and Processes

• The discussion centers around various types of memory and how they function within cognitive psychology.

Types of Memory

Explicit Memory

• Also known as declarative memory.

• Memory that can be consciously recalled or articulated.

• Can be divided into two categories:

  • Episodic Memory: Refers to memories of events and experiences that an individual has personally encountered.

  • Example: Recalling a visit to a park last week.

  • Semantic Memory: Involves facts and general knowledge that an individual has learned over time.

  • Example: Mathematical truth such as 2 + 2 = 4.

Implicit Memory

• It consists of actions or skills that can be performed without conscious thought.

• Includes:

  • Skills learned over time (e.g., riding a bike, walking).

  • Responses that may not be consciously recallable (e.g., muscle memory).

  • Procedural memory: a set of actions we have learned (skills like riding a bike)

  • Priming：A cognitive phenomenon/concept where exposure to certain concepts or ideas influences subsequent responses without conscious awareness.

• Example: Exposure to competitive ideas may affect behavior compared to exposure to cooperative ideas.

Memory Processes

Encoding

• The first step in the memory process where sensory input is transformed into a format that can be stored.

• This process is essential for transferring information from sensory memory to short-term or long-term memory.

• Attention: Critical in the encoding phase, as selective attention impacts which information is registered in memory.

  • Example: Difficulty memorizing surroundings while focusing on driving during heavy rain.

Storage

• Involves maintaining encoded information over time.

• Different types of storage:

  • Sensory Memory: Briefly holds sensory information (e.g., fleeting impressions of visual stimuli).

  • Example: Closing eyes and noticing brief visual traces before they disappear.

  • Duration: Lasts only a few seconds (approximately 4-5 seconds).

  • Short-Term Memory: Retains information for a short period (approximately 20 seconds).

  • Capacity: Often noted as being able to hold about 7 ± 2 items.

  • Long-Term Memory: Can store a seemingly unlimited amount of information for prolonged durations.

  • The more in-depth processing and repetition (maintenance rehearsal) enhance the likelihood of transfer from short-term to long-term memory.

Working Memory

• A subcomponent of short-term memory that manipulates and processes information.

• Facilitates transferring information to long-term memory through repetition and organization.

Memory Retrieval

• The process of recalling or accessing stored memories.

• Efficiency of retrieval can be influenced by various factors including context and emotional state.

  • Context-Dependent Memory: Memory retrieval is improved when the context at retrieval matches the context at encoding.

  • State-Dependent Memory: Memory retrieval is enhanced when individuals are in the same emotional state as when the information was encoded.

Memory Distortions

Retroactive Interference

• Occurs when new information learned interferes with the recall of prior information.

  • Example: Difficulty recalling an old password when a new one has been recently learned.

Proactive Interference

• When old information hinders the memory of new information.

  • Example: Calling a new partner by an ex's name.

Flashbulb Memories

• Highly detailed and vivid memories of significant events (often emotional in nature).

• Example: Recall of events such as 9/11, where individuals remember specific details about their surroundings at the time the event occurred.