Transcript Living Psychology by Karen Huffman

The Nature of Memory

Memory: internal record or
representation of some prior
event or experience

Memory is also a constructive process, in
which we actively organize and shape
information as it is processed, stored, and
retrieved.
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Enhancing Memory
The Nature of Memory—
Four Memory Models
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The Nature of Memory—
Four Memory Models (Continued)
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The Nature of Memory—
Description of Four Memory Models
1. Information
Processing Approach:
memory is a process
analogous to a
computer, which
encodes, stores, and
retrieves information
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The Nature of Memory—
Description of Four Memory Models
(Cont.)
2. Parallel Distributed
Processing Model:
memory is distributed
across a network of
interconnected units
that work
simultaneously (in a
parallel fashion) to
process information
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The Nature of Memory—
Description of Four Memory Models
(Continued)
3. Levels of Processing Approach: memory
depends on the degree or depth of mental
processing occurring when material is
initially encountered
4. Traditional Three-Stage Memory Model:
memory requires three different storage
boxes to hold and process information for
various lengths of time
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Diagram of Three-Stage Memory Model
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Enhancing Memory
Summary of three stages
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SR: Duration? Representation? Capacity?
Loss?
STS: Duration? Representation? Capacity?
Loss?
LTM: Duration? Representation? Capacity?
Loss?
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The Nature of Memory—
Description of Three Stage
Memory Model

Sensory Memory: briefly preserves a
relatively exact replica of sensory
information
 Sensory memory has a large capacity
but information only lasts a few seconds.
 Selected information is sent on to shortterm memory.
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Sperling’s Experiment with
Sensory Memory

When flashed an
arrangement of 12
letters for 1/20 of a
second, most people
can only recall 4 or 5.
Sperling proved all 12
letters were available
in sensory memory if
they can be attended
to quickly.
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The Nature of Memory—
Three Stage Memory Model (Cont.)
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Short-Term Memory (STM): temporarily
stores sensory information and decides
whether to send it on to long-term memory
(LTM)
STM can hold 5-9 items for about 30
seconds before they are forgotten.
STM capacity can be increased with
chunking. STM duration improves with
maintenance rehearsal.
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Types of Rehearsal

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Maintenance vs. Elaborative
Repetition vs. Meaningful associations
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•
•
•
STM, also called working
memory, is much more
than just a passive,
temporary holding area.
Three parts of working
memory:
visuospatial sketchpad
central executive
phonological loop
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The Nature of Memory—
Three Stage Memory Model
(Continued)

Long-Term
Memory (LTM):
relatively
permanent
memory storage
with a virtually
limitless capacity
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Types of Long-Term Memories
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Improving Long-Term Memory
(LTM)

LTM can be improved with:
 Organization
 Elaborative Rehearsal
 Retrieval Cues
 Recognition
 Recall
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Semantic nature of LTM

Who was president in 1940?
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An Example of Using Hierarchies as an
Organizational Tool
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An Example of Recognition Vs. Recall

Research shows people are better at recognizing
photos of previous high school classmates than
recalling their names.
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Forgetting: How Quickly Do We Forget?
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Ebbinghaus found:
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forgetting occurs
most rapidly
immediately after
learning.
relearning takes
less time than
initial learning.
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Why Do We Forget? Five Key Theories
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Decay
Interference
Motivated
Forgetting
Encoding Failure
Retrieval Failure
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Five Theories of Forgetting
(Continued)
1. Decay Theory:
memory degrades with time
2. Interference Theory: one
memory competes (interferes) with another
Retroactive Interference (new information
interferes with old)
 Proactive Interference (old information
interferes with new)

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Forgetting: Interference vs. Decay

Key Study: Jenkins & Dallenbach (1924),
subjects learn list of words either before
sleeping or after waking.
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Two Forms of Interference
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Five Theories of Forgetting (Continued)
3. Motivated Forgetting: motivation to forget
unpleasant, painful, threatening, or
embarrassing memories
4. Encoding Failure: information in STM is
not encoded in LTM
5. Retrieval Failure: memories stored in
LTM are momentarily inaccessible
(tipof-the-tongue phenomenon)
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A Test for Encoding: Can You Identify
the Actual Penny?
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Overcoming Problems with Forgetting

Serial Position
Effect:
remembering
material at the
beginning and
end of the list
better than
material in the
middle
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Overcoming Problems with Forgetting
(Continued)
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Source Amnesia: forgetting the true source
of a memory
Sleeper Effect: information from an
unreliable source, which was initially
discounted, later gains credibility because
source is forgotten
Spacing of Practice: distributed practice is
better than massed practice
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Pause and Reflect:
Check & Review
1.
You remember material from the first and last of
the chapter better than material in the middle. This
is a good example of the _____ effect.
2.
The _____ of forgetting best explains why you
forgot the name of a previous employer who gave
you a bad performance evaluation.
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Biological Bases of Memory
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1.
2.
Biological changes in neurons facilitate
memory through long-term potentiation
(LTP), which happens in at least two
ways:
repeated stimulation of a synapse
strengthens the synapse, and
neuron’s ability to release its
neurotransmitters is increased or
decreased.
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Biological Bases of Memory
(Continued)

Hormones
also affect memory
(e.g., flashbulb
memories--vivid and
lasting images are
associated with
surprising or strongly
emotional events).
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Where Are Memories Located?
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Memory tends
to be localized
and distributed
throughout the
brain--not just
the cortex.
Biology and Memory Loss:
Injury and Disease
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•
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Amnesia: memory
loss from brain injury
or trauma
Retrograde amnesia:
old memories lost
Anterograde
amnesia: new
memories lost
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Biology and Memory Loss:
Injury and Disease (Continued)

Alzheimer’s Disease (AD): progressive
mental deterioration characterized by
severe memory loss
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Memory and the Criminal Justice
System

Two memory problems
with profound legal
implications:
•
Eyewitness Testimony-very persuasive but can be flawed
•
Repressed Memories—
considerable debate as to whether recovered
memories are accurate or repressed
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Using Psychology to Improve
Our Memory

Why do we distort our memories?

Need to maintain logic and consistency.
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Need to shape and construct our
memories because it is more efficient to
do so.
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Pause and Reflect:
Why Study Psychology?

Psychological research conducts basic research,
which helps us describe and understand our own
and others’ memory processes. This basic research
also leads to applied research that shows us how to
improve our sensory, short-term, and long-term
memory.
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Enhancing Memory
Using Psychology to Improve
Our Memory (Continued)

Eight Tips for Memory Improvement:
1.
2.
3.
4.
5.
Pay attention and reduce interference
Use rehearsal techniques
Organization
Counteract serial position effect
Time management
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Using Psychology to Improve
Our Memory (Continued)
6. Use encoding specificity principle
7. Employ self-monitoring and overlearning
8. Use mnemonic devices (e.g., method of
loci, peg-word, substitute word, word
associations)
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Pause and Reflect:
Critical Thinking

Which of the “Eight Tips for Memory
Improvement” do you need to use to improve
your academic performance? Which of the eight
tips would your best friend suggest that you need
to improve for your everyday interactions?
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Huffman: Psychology in Action (8e)
Psychology in
Action (8e)
by
Karen Huffman
PowerPoint  Lecture Notes Presentation
End of
Chapter 7: Memory
Karen Huffman, Palomar College
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