Memory Chapter 9 Memory The by lanyuehua


									Chapter 9: Memory

The Phenomenon of Memory
     Memory – the persistence of learning over time through the storage and retrieval of
     Memory capacity is most apparent in the recall of unique and highly emotional moments
      of a person’s past.
     Flashbulb Memories – a clear memory an emotionally significant moment or event.
  Information Processing
     Forming Memories of Information: Select, Process, Store, Retrieve
     Information Processing System
          o Encoding – the process of getting information into the memory system; extract
          o Storage – the retention of encoded information over time.
          o Retrieval – process of getting information out of memory storage.
     Three-Stage Processing Model of Memory
          o Richard Atkinson and Richard Shiffrin
          o Suggests that people create memories through three stages
          o People first record information as sensory memory, and then it’s processed in
              short-term memory, where it is finally encoded for long-term memory to be
              retrieved later.
      1. Sensory Memory – the immediate, initial recording of sensory information in the
          memory system.
      2. Short-term Memory – activated memory that holds a few items briefly before the
          information is stored or forgotten.
      *Working memory is a similar concept that focuses on the processing of briefly stored
      3. Long-term Memory – the relatively permanent and limitless storehouse of the
      memory system.
     Automatic Processing (without awareness)
         o unconscious encoding of incidental information (i.e. space, time, frequency, word
             meanings, etc.)
         o Hasher and Zacks- found that we can’t switch encoding/memory on/off
     Effortful Processing
         o encoding that requires attention/conscious effort
         o Ebbinghaus- study with random syllables and memory “even after we learn
             material, additional rehearsal necessary to retain”
     Rehersal
         o conscious repetition of information, either to maintain info or encode for storage
     Spacing Effect
         o tendency for distributed study/practice to yield better long-term retention vs
             massed study/practice
     Serial Position Effect
           o  tendency to recall last and first items in list the best
      Visual Encoding
          o encoding of picture images
      Acoustic Encoding
          o encoding of sound, especially words
      Semantic Encoding
          o encoding of meaning, including meaning of words
      Imagery
          o mental pictures; powerful aid to effortful processing, especially when paried with
              semantic encoding
      Mnemonics
          o memory aids, especially those with imagery/organizational devices
      Chunking
          o organizing terms into familiar, manageable units (usually automatic)
      Next-in-line Effect
          o poorest memories are for what person said just before them (ex. saying names in
      What we encode
          o 3 key ways: encoding meaning, visualizing it, mentally organizing (some
              automatically, but there are effortful strategies for enhancing memory)

Three Sins of Forgetting
       Absent-mindedness: inattention to details produces encoding failure
       Transience: storage decay over time
       Blocking: inaccessibility of stored information

Three sins of Distortion
       Misattribution: confusing the source of information
       Suggestibility: lingering effection of misinformation
       Bias: belief-colored recollections

What causes us to forget?
      We fail to encode information
      Gradual fading of physical memory trace


Proactive Interference: something you learned earlier disrupts your recall of something you
experience later.
Retroactive Interference: new information makes it harder to recall something you learned

Daniel Schacter: created the seven ways our memories fail us (7 sins of memory)
Ebbinhause: Forgetting is initially rapid, then levels off with time (forgetting curve)
John Jenkins & Karl Dallenbach: Sleep benefits classic experiment.

Storage-Retention of encoded information over time.
Sensory Memory
Iconic Memory- A momentary sensory memory of visual stimuli; photographic or picture-image
memory lasting no more than a few tenths of a second.
Echoic Memory- A momentary sensory memory of auditory stimuli; if attention is elsewhere
sounds and words can still be recalled within 3 or 4 seconds.

       Short Term Memory
       -Without active processing, short-term memories have a limited life.
       -Typically only stores roughly 7 pieces of information
       -Magic Number 7, plus or minus two (George Miller)
       -At any given moment, we consciously process only a limited amount of info.

Long-Term Memory
-Memory capacity is essentially limitless
-Point proven by those who can perform phenomenal memory feats.
Implicit memory- Retention independent of conscious recollection.
*Motor and cognitive skills
*Classical and operant conditioning effects
Explicit memory- Memory of facts and experiences that one can consciously
know and “declare.”
*Facts/general knowledge (“semantic memory”)
*personally experienced events (“episodic memory”)

Retrieval-Process of getting information out of a memory.
Recall-Retrieval of previously learned information
Recognition-Measure of memory where person only has to identify items previously learned.
Priming-The activation, often unconsciously, of particular associations in memory.
Déjà vu-Eerie sense that one has experienced something before. Cues from current situation may
subconsciously trigger retrieval of an earlier experience.
-Tastes, smells and sights often evoke recall of associated episodes.
-Placing yourself in the context where you previously experienced something assists in retrieval.
Mood Congruent memory- The tendency to recall experiences that are consistent with one’s
current good or bad mood.
State dependant memory- What we learn in one state of mind is sometimes more easily recalled
when we are again in that state of mind.
Memory Construction
Misinformation and Imagination Effects
       -misinformation effect: after exposure to subtle misinformation, many people
       -repeatedly imagining nonexistent actions and events can create false memories
       -imagined events later seem more familiar, and familiar things seem more real
       -Source Amnesia
       -when we encode memories, we distribute different aspects of them to different parts of
       the brain. Among the frailest parts of a memory is its source.
       -we retain image, but not context in which we acquired it
       -source amnesia: attributing to the wrong source an event that we have experienced,
       heard about, read about, or imagined (aka source misattribution)
Discerning True and False Memories
       -we can’t be sure whether a memory is real by how real it feels or by how persistent it is
Children’s Eyewitness Recall
       -leading questions can plant false memories of a story they expect to hear
       -however, when children are questioned about their experiences in words they
       understand, they often accurately recall what happened and who did it
Repressed or Constructed Memories of Abuse
       -traumatic events are sometimes forgotten
       -cognitive psychologist Jennifer Freyd theorizes that memories may remain vivid for life-
       threatening traumas, yet they may be dulled or blocked for traumas that involve repeated
       -some who have forgotten claim later to have recovered memories of abuse
       -many psychological and psychiatric societies around the world agree on the following:
       -injustice happens
       -incest happens
       -forgetting happens
       -recovered memories are commonplace
       -memories “recovered” under hypnosis of the influence of drugs are especially unreliable
       -memories of things happening before age 3 are unreliable
       -infantile amnesia: the inability to reliably recall happenings from the first 3 years of life
       -memories, whether real or false, can be emotionally upsetting

Improving Memory
Suggestions to Improve Memory:
    Study repeatedly to boost long-term recall
    Rehearse or actively think about material
    Make the material personally meaningful by forming images and associations
    Use mnemonic devices to remember a list of unfamiliar items
    Recall events while they are fresh in your mind
Credits Page
Sophie – Phenomenon of Memory, Improving Memory, Assembly of Outline
Lindsay – Storage & Retrieval
Rachael – Memory Construction
Leeann - Forgetting
Melanie – Encoding

To top