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Transcript of 1 Memory Ms. Simon Chapter 9 2 How does memory relate to learning? Memory is an indication that...
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MemoryMs. SimonChapter 9
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How does memory relate to learning?
Memory is an indication that learning has persisted over time.
Learning is acquisition, memory is retention
Memory is our ability to store and retrieve information.
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Flashbulb MemoryFlashbulb memory -Results from unique or emotional moment -results in a clear, strong memory
Rut
ers/
Cor
bis
However, this memory is not free from errors.
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Do Now: Recall as many verses as you can from the “Twelve Days of Christmas”
Memory is a complex mental system
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A G D F
F B Z Q T
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Stages of Memory
Keyboard(Encoding)
Disk(Storage)
Monitor(Retrieval)
Sequential Process
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Three-stage Model (Information Processing)
The Atkinson-Schiffrin (1968) three-stage model of memory includes a) sensory memory, b) short-
term memory, and c) long-term memory.
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Sensory Memory
• Split second storage for incoming stimuli– Iconic memory
• fleeting perfect photograph of a scene
• Lasts about 1/10th of a second
– Echoic memory- memory for sounds
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Sensory Memory: only some sensory input is encoded into short-term
memory, most is lost….
Why do we encode certain sensory info into short-term?
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Short term memory lasts 10-30 seconds but can be expanded
Long term memory last minutes, days, hours, weeks, years
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Working Memory
Alan Baddeley (2002) proposes that working memory contains auditory and
visual processing
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Encoding: Getting Information In
How We Encode
1. Automatic Processing: Some information is automatically encoded
2. Effortful Processing: However, new or unusual information (friend’s new cell-phone number) requires attention and effort.
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Automatic Processing
We process an enormous amount of information effortlessly, such as the following:
1. Space: example: reading a textbook2. Time: We unintentionally note the
events that take place in a day.3. Frequency: You effortlessly keep track
of things that happen to you.
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MemoryDecember 14, 2009
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Typewriter
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Typewriter
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Typewriter
VoidCigarette
Inherent
Fire
Process
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What information do we process automatically?
• Time
• Space
• Frequency
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Effortful Processing
Committing novel information to
memory requires effort
Such processing leads to durable and
accessible memories.
Spencer G
rant/ Photo E
dit
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ananastock/ Alam
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Rehearsal
Effortful learning usually requires
rehearsal or conscious
repetition.
Ebbinghaus studied rehearsal by using nonsense syllables: TUV YOF GEK XOZ
Hermann Ebbinghaus(1850-1909)
http://ww
w.isbn3-540-21358-9.de
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Rehearsal
The more times the nonsense syllables were practiced on
Day 1,the fewer repetitions
were required to remember them on
Day 2.
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Memory Effects
1. Next-in-line-Effect: When you are so anxious about being next that you cannot remember what the person just before you in line says
1. Spacing Effect: We retain information better when we rehearse over time.
2. Serial Position Effect: When your recall is better for first and last items on a list, but poor for middle items.
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Spacing Effect
Distributing rehearsal (spacing effect) is better than practicing all at once. Robert Frost’s poem
could be memorized with fair ease if spread over time.
ACQUAINTED WITH THE NIGHTRobert Frost
I have been one acquainted with the night.I have walked out in rain — and back in
rain.I have outwalked the furthest city light.
… …
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Serial Position Effect
1. TUV2. ZOF3. GEK4. WAV5. XOZ6. TIK7. FUT8. WIB9. SAR10. POZ11. REY12. GIJ
Better recall
Better recall
Poor recall
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What We Encode
1. Encoding by meaning2. Encoding by images3. Encoding by organization
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Encoding Meaning
Q: Did the word begin with a capital letter?
StructuralEncoding
Q: Did the word rhyme with the word “weight”?
Q: Would the word fit in the sentence? He met a __________ in the street.
PhonemicEncoding
SemanticEncoding
“Whale”
Craik and Lockhart (1972)
Intermediate
Deep
Shallow
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Results
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Visual Encoding
Mental pictures (imagery) are a powerful aid to effortful processing, especially
when combined with semantic encoding.
Showing adverse effects of tanning and smoking in a picture may be more powerful than simply talking about it.
Both photos: H
o/AP Photo
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Mnemonics
Imagery is at the heart of many memory aids. Mnemonic techniques use vivid
imagery in aiding memory.
1. Method of Loci
2. “Pegword System”
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Method of Loci
List of Items
CharcoalPensBed SheetsHammer...Rug
Imagined Locations
BackyardStudyBedroomGarage...Living Room
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Link Method
Involves forming a mental image of items to be remembered in a way that links them together.
List of Items
NewspaperShaving creamPenUmbrella...Lamp
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Break down complex information into broad concepts and further subdivide
them
Organizing Information for Encoding
1. Chunking
2. Hierarchy
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GHA TUV SOW RRT
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MTV FBI CIA TBS LOL
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Chunking
Organizing items into a familiar, manageable unit. Try to remember the numbers below.
1-7-7-6-1-4-9-2-1-8-1-2-1-9-4-1
If you are well versed with American history, chunk the numbers together
and see if you can recall them better. 1776 1492 1812 1941.
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Chunking
Acronyms are another way of chunking information to remember it.
HOMES = Huron, Ontario, Michigan, Erie, Superior
PEMDAS = Parentheses, Exponent, Multiply, Divide, Add, Subtract
ROY G. BIV = Red, Orange, Yellow, Green, Blue, Indigo, Violet
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Hierarchy
Complex information broken down into broad concepts and further subdivided
into categories and subcategories.
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Encoding Summarized in a Hierarchy
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Storage: Retaining Information
Storage is at the heart of memory. Three stores of memory are shown
below:SensoryMemory
WorkingMemory
Long-termMemory
Encoding
RetrievalEncoding
Events
Retrieval
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Sensory Memory
SensoryMemory
WorkingMemory
Long-termMemory
Encoding
RetrievalEncoding
Events
Retrieval
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Whole Report
The exposure time for the stimulus is so smallthat items cannot be rehearsed.
R G TF M QL Z S
50 ms (1/20 second)
“Recall”R T M Z
(44% recall)
Sperling (1960)
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Partial Report
Low Tone
Medium Tone
High Tone
“Recall”J R S
(100% recall)
Sperling (1960) argued that sensory memory capacity was larger than what was originally
thought.
50 ms (1/20 second)
S X TJ R SP K Y
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Time Delay
“Recall”N _ _
(33% recall)
TimeDelay
50 ms (1/20 second)
A D IN L VO G H
Low Tone
Medium Tone
High Tone
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Sensory Memory
The longer the delay, the greater the memory loss.
20
40
60
80
Perc
en
t R
ecog
niz
ed
0.15 0.30 0.50 1.00
Time (Seconds)
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Sensory Memories
Iconic0.5 sec. long
Echoic3-4 sec. long
Hepatic< 1 sec. long
The duration of sensory memory varies for the different senses.
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Working Memory
SensoryMemory
WorkingMemory
Long-termMemory
Encoding
RetrievalEncoding
Events
Retrieval
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Working Memory
Working memory, the new name for short-term memory, has a limited capacity (7±2)
and a short duration (20 seconds).
Sir George Hamilton observed that he could accurately remember up
to 7 beans thrown on the floor. If there were more beans, he guessed.
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Capacity
You should be able to
recall 7±2 letters.
The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for
Processing Information (1956).
George Miller
M U T G I K T L R S Y P
Ready?
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Chunking
F-B-I-T-W-A-C-I-A-I-B-M
The capacity of the working memory may be increased by “Chunking.”
FBI TWA CIA IBM4 chunks
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Duration
Brown/Peterson and Peterson (1958/1959) measured the duration of working memory
by manipulating rehearsal.
CH??
The duration of the working memory is about 20 sec.
CHJMKTHIJ547
547544541…
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Working Memory Duration
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Long-Term Memory
SensoryMemory
WorkingMemory
Long-termMemory
Encoding
RetrievalEncoding
Events
Retrieval
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Long-Term Memory
Unlimited capacity store. Estimates on capacity range from 1000 billion to 1,000,000 billion bits
of information (Landauer, 1986).
The Clark’s nutcracker can locate 6,000 caches ofburied pine seeds during winter and spring.
R.J. E
rwin/ Photo R
esearchers
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Memory Feats
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Do Now:There are three types of memory storage: sensory
memory, short-term memory, and long-term memory. Sensory memory copies an exact replica vivid images and lasts for 0.2 seconds, working
Memory lasts for up to 20 seconds
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Memory Stores
FeatureSensoryMemory
Working Memory
LTM
Encoding Exact Copy Phonemic Semantic
Capacity Unlimited7±2
ChunksVery Large
Duration 0.20 sec. 20 sec. Years
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Storing Memories in the Brain
1. Through electrical stimulation of the brain, Wilder Penfield concluded that old memories were etched into the brain.
2. Using rats, Lashley (1950) suggested that even after removing parts of the brain, the animals retain partial memory of the maze.
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Synaptic Changes
In Aplysia serotonin release from neurons increases after conditioning.
Photo: S
cientific Am
erican
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Synaptic Changes
Long-Term Potentiation (LTP)=
synaptic enhancement after learning (Lynch, 2002). An increase in
neurotransmitter release or receptors
indicates strengthening of
synapses.
Both P
hotos: From
N. T
oni et al., Nature, 402, N
ov. 25 1999. Courtesy of D
ominique M
uller
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Stress Hormones & Memory
Heightened emotions (stress-related or otherwise) make for stronger memories. Continued stress may disrupt memory.
Scott Barbour/ G
etty Images
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Types of MemoryExplicit Memory refers to facts and
experiences that one can consciously know and declare.
Example: Pearl Harbor occurred on December 7, 1941.
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Types of MemoryImplicit (procedural) memory how to do
something, a skill Example: Riding a bike
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Explicit= DeclarativeImplicit= Procedural
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Types of Explicit MemoryEpisodic- autobiographical events personally experiencedExample: When is your birthday?Semantic: Words, Ideas, ConceptsExample: What is the capital of France?
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Do Now:Classify each as implicit or explicit memory.If it is explicit, indicate if it is semantic or episodic.• Knowing how to tie your shoe- implicit• The history of your grandparents- explicit• How to cook- implicit/explicit• Typing- implicit• Your last summer vacation- explicit episodic• The causes of World War Two- explicit semantic• What you ate during lunch- explicit episodic• The sound of the school bell causing you to
instinctively reach for your backpack:
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Hippocampus
Hippocampus – a neural center in the limbicsystem that processes explicit memories.
Weidenfield &
Nicolson archives
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No New Memories
Anterograde Amnesia
AnterogradeAmnesia
(HM)
Surgery
After losing his hippocampus in surgery, patient Henry M. (HM) remembered
everything before the operation but cannot make new memories. We call this
anterograde amnesia.
Memory Intact
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Implicit Memory
HM is unable to make new memories that aredeclarative (explicit), but he can form newmemories that are procedural (implicit).
CBA
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Cerebellum
Cerebellum – a neural center in the hindbrain that processes implicit memories.
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Amygdala
• Recent studies show the
amygdala is involved in
processing emotional
memories
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How do we retrieve memories from our long-term storage?
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Retrieval: Getting Information Out
Retrieval refers to getting information out of the memory store.
Spanky’s Yearbook A
rchive
Spanky’s Yearbook A
rchive
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Measures of Memory
In recognition, the person must identify an item amongst other choices. (A
multiple-choice test requires recognition.)
1. Name the capital of France.
a. Brusselsb. Romec. Londond. Paris
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Measures of Memory
In recall, the person must retrieve information using effort. (A fill-in-the
blank test requires recall.)
1. The capital of France is ______.
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Measures of Memory
In relearning, the individual shows how much time (or effort) is saved when
learning material for the second time.
ListJetDaggerTreeKite…SilkFrogRing
It took 10 trialsto learn this list
ListJetDaggerTreeKite…SilkFrogRing
It took 5 trialsto learn the list
1 day laterSaving
OriginalTrials
RelearningTrials
OriginalTrials
10 510
50%
X 100
X 100
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Retrieval Cues
Memories are held in storage by a web of associations. These associations are like
anchors that help retrieve memory.
Fire Truck
truck
red
fire
heatsmoke
smellwater
hose
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Priming
To retrieve a specific memory from the web of associations, you must first
activate one of the strands that leads to it. This process is called priming.
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Context Effects
Scuba divers recall more words underwater if they learned the list underwater, while
they recall more words on land if they learned that list on land (Godden &
Baddeley, 1975).
Fred McC
onnaughey/ Photo Researchers
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Context Effects
After learning to move a mobile by kicking, infants most strongly respond when retested in the same context rather than in a different
context (Butler & Rovee-Collier, 1989).
Courtesy of C
arolyn Rovee-C
ollier, R
utgers University
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December 18, 2009Do Now:
1) What is long-term potentiation?
2) How can stress have two different effects on memory?
3) What is priming?
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Priming and Context Effects
Our memory forms a semantic network of associations.
Context we are in can PRIME certain memories, leading us back to our desired memory.
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Déja Vu
Déja Vu means “I've experienced this before.” Cues from the current situation may unconsciously trigger retrieval of an earlier similar experience.
© T
he New
Yorker C
ollection, 1990. Leo C
ullum from
cartoonbank.com
. All R
ights Reserved
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Moods and StatesMood-congruent memory: We recall experiences
that are consistent with our current mood. State-dependent Memory: We recall events while
in certain states of consciousnessJorgen Schytte/ Still PicturesBoth moods and states serve as retrieval cues.
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Forgetting
An inability to retrieve information due to:
1) Poor encoding2) Poor storage3) Poor retrieval.
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Encoding Failure
We cannot remember what we do not encode.
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Which penny is real?
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Storage Decay
Poor durability of stored memories leads to their decay.
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Retrieval Failure
Although the information is retained in the memory store, it cannot be accessed.
Tip-of-the-tongue (TOT) is a retrieval failure phenomenon. Given a cue (What makes blood cells red?) the subject says the word begins
with an H (hemoglobin).
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Interference
Learning some new information may disruptretrieval of other information.
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Retroactive Interference
Sleep prevents retroactive interference. Therefore, itleads to better recall.
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Do Now: Read Story
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Motivated Forgetting
Motivated Forgetting: People unknowingly revise their memories.
Repression: A defense mechanism that banishes anxiety-arousing thoughts, feelings, and memories from consciousness.
Sigmund Freud
Culver Pictures
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Why do we forget?
Forgetting can occur at any
memory stage
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Memory Construction
While tapping our memories, we filter or fill in missing pieces of information to
make our recall more coherent.
Misinformation Effect: Incorporating misleading information into one's
memory of an event.
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Eyewitnesses reconstruct their memories when questioned about the event.
Misinformation and Imagination Effects
Depiction of the actual accident.
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Misinformation
Group A: How fast were the cars going when they hit each other?
Group B: How fast were the cars going when they smashed into each other?
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Memory Construction
A week later they were asked: Was there any broken glass? Group B (smashed into) reported more broken glass than Group A
(hit).
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Source Amnesia
Source Amnesia: Attributing an event to the wrong source that we experienced,
heard, read, or imagined (misattribution).
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Discerning True & False Memories
Just like true perception and illusion, real memories and memories that seem real
are difficult to discern.
When students formed a happy or angry memory ofmorphed (computer blended) faces, they made
the (computer assisted) faces (a), either happier or (b) angrier.
© Sim
on Niedsenthal
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Repressed or Constructed?Some adults actually do forget childhood episodes of abuse.
False Memory SyndromeA condition in which a person’s identity and relationships center around a false but strongly believed memory of a traumatic experience, which is sometimes induced by well-meaning therapists.
False Memories
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Children’s eyewitness recall can be unreliable if leading questions are posed. However, if
cognitive interviews are neutrally worded, the accuracy of their recall increases. In cases of
sexual abuse, this usually suggests a lower percentage of abuse.
Children’s Eyewitness Recall
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Are memories of abuse repressed or constructed?
Many psychotherapists believe that early childhood sexual abuse results in
repressed memories.
However, other psychologists question such beliefs and think that such memories may be constructed.
Memories of Abuse