Memory Summary

Memory Overview

  • Types of Memory:
    • Sensory Memory: Very brief retention of sensory information (e.g., visual/iconic memory lasts ~0.5 seconds, auditory/echoic memory lasts a few seconds).
    • Working Memory: Temporary storage for information we are actively using; typically holds 7 ± 2 items for ~20-30 seconds without rehearsal.
    • Long-Term Memory: Presumed to be infinite in capacity and duration; memories may change over time but can last indefinitely.

Memory Processes

  • Encoding: The process of transforming sensory input into a format suitable for storage.

    • Requires attention and may involve emotional elements processed by the amygdala.

  • Storage: The retention of encoded information over time; can fade if not recalled properly.

  • Retrieval: The process of accessing stored information to bring it back into working memory. Includes recognition (identifying familiar information) and recall (retrieving information without cues).

Memory Formation

  • Repetition: Important for transferring from working to long-term memory.

  • Chunking: Organizing information into smaller, manageable groups to enhance retention (e.g., grouping numbers or letters).

  • Types of Encoding:

    • Visual Encoding: Storing images.
    • Acoustic Encoding: Storing sound, especially language.
    • Tactile Encoding: Storing information through touch.
    • Semantic Encoding: Storing meaning by associating new information with existing knowledge.

Memory and Emotion

  • Emotional events tend to be more memorable due to increased attention and encoding efficiency.
  • The emotional aspect of memories often alters how they are recalled (e.g., different recollections in emotional arguments between genders).

Important Theories/Concepts

  • Primacy Effect: Tendency to remember the first items presented in a sequence.

  • Recency Effect: Tendency to remember the last items presented.

  • Importance of sleep for effective encoding into long-term memory; inadequate sleep leads to poor memory retention.

  • Automatic vs. Effortful Processing:

    • Automatic Processing: Memory encoding without conscious effort (e.g., riding a bike).
    • Effortful Processing: Requires attention and effort (e.g., learning new information).