Memory Construction

MEMORY CONSTRUCTION

CONTEXT EFFECTS

  • Memory is not uniform; it varies according to contextual factors.

    • Factors influencing memory:

    • Time of day

    • Location

    • Distractions

    • Events

    • Internal states (emotions, mood, etc.)

MOOD AND MEMORY

State-dependent Memory

  • Definition: Recall is more efficient when in the same state of consciousness as when the memory was encoded.

    • Example: Learning something while drunk may be easier to recall while drunk rather than sober.

Mood Congruent Memory

  • Definition: Individuals are more likely to remember experiences that are consistent with their current mood.

    • Example: If a person feels sad, they may remember more negative experiences rather than positive ones.

FORGETTING

  • Question: Is it necessary to remember everything?

  • Importance of forgetting: It is vital to discard useless information to avoid cluttering consciousness, which can impede overall thinking and cognitive function.

THREE SINS OF FORGETTING

  1. Absent-mindedness

    • Definition: A lack of attention to detail leading to encoding failure.

  2. Transience

    • Definition: Memory fades with the passage of time; known as storage decay.

  3. Blocking

    • Definition: Inaccessibility of stored information, often referred to as retrieval failure.

THREE SINS OF DISTORTION

  1. Misattribution

    • Definition: Confusing the source of information; errors in identifying the origin.

  2. Suggestibility

    • Definition: The lingering effects of misinformation affecting memory recall.

  3. Bias

    • Definition: Recollections influenced by personal beliefs or experiences, coloring the memory.

ONE SIN OF INTRUSION

  • Persistence

    • Definition: Remembering unwanted or intrusive memories that one wishes to forget.

ENCODING FAILURE

  • Definition: Failure to encode information properly, leading to forgetting.

External Events Affecting Memory Encoding

  • Sensory Attention: The process of focusing on specific stimuli to aid memory retention.

  • Types of Memory:

    • Short-term memory

    • Long-term memory

  • Encoding failure results in forgetting.

Factors Leading to Encoding Failure

  1. Selective Attention

    • Definition: If an individual does not register sensory input, it cannot be encoded for memory.

  2. Age-related Memory Decline

    • Effect: Older adults often experience slower encoding due to decreased brain responsiveness.

STORAGE DECAY

  • Definition: The loss of information over time due to lack of use, leading to forgetting.

EBBINGHAUS CURVE

  • Visual representation of memory retention over time after learning.

    • Key details:

    • Retention drops significantly shortly after learning, then levels off.

    • Example percentages of list retention:

      • 60% at day 1

      • 40% around day 20

      • Drops to 0% significantly after 30 days.

RETRIEVAL FAILURE

  • Definition: The inability to access memory that is stored, leading to forgetting.

    • Similar to encoding and storage phases, retrieval is crucial for connecting memory.

TIP OF THE TONGUE PHENOMENON (TOT)

  • Definition: A retrieval failure where an individual cannot fully retrieve a memory but can recall fragments.

    • Indicates that forgetting may result from retrieval failure rather than encoding or storage issues.

INTERFERENCE

  • Definition: Occurs when one piece of information conflicts with another or suppresses it, particularly with similar information.

Types of Interference

  1. Proactive Interference

    • Occurs when previously learned information hinders the learning of new information.

  2. Retroactive Interference

    • Occurs when newly acquired material affects the recall of previously learned information.

AMNESIA

  • Definition: Inability to recall past events, leading to memory loss.

Types of Amnesia

  1. Psychogenic Amnesia

    • Resulting from psychological trauma or stress.

  2. Organic Amnesia

    • Resulting from physiological factors, like brain damage.

  3. Anterograde Amnesia

    • Inability to form new memories after the onset of amnesia.

  4. Retrograde Amnesia

    • Inability to retrieve memories from before the onset of the condition.

MOTIVATED FORGETTING

  • Definition: The phenomenon where people forget information because it is unpleasant or distressing to remember.

    • Repression: A defense mechanism that prevents distressing thoughts or experiences from reaching consciousness, relegating them to the unconscious mind.

MISINFORMATION EFFECT

  • Observation: Human memory is not as reliable as often believed.

    • Definition: The incorporation of misleading information into one’s recollection of an event.

    • Notable: Individuals can feel confident in inaccurate recollections due to misinformation.

RECONSOLIDATION

  • Definition: A process wherein previously stored memories are altered when retrieved and potentially stored again, affecting the accuracy and reliability of memories.

EYEWITNESS TESTIMONY

  • Definition: The account of events as recalled by individuals who witnessed them, typically in a legal context.

  • Findings: Research indicates various inaccuracies in eyewitness testimony; witnesses may embellish or misremember details.

    • Points of contention:

    • Eyewitnesses may have an interest in the trial's outcomes, affecting recollections.

    • Over time, memories may appear to improve, but can become less accurate.

    • The reliability of embellished memories is debated, alongside methodologies such as hypnosis for memory enhancement.