HOW EMOTIONS SHAPE OUR MEMORIES
Emotion and mood can profoundly influence how we encode, store, and
retrieve memories. This complex relationship sheds light on the interplay
between cognition and affect.
Emotion Enhances Memory
The Pollyanna Principle - We tend to better remember pleasant
compared to unpleasant stimuli. Positivity enhances encoding and
retrieval.
Neutral items associated with positive stimuli are also better
recalled, while anger and violence can impair memory.
Over time, negative memories tend to fade faster than positive
ones. The positivity effect emerges.
Mood Congruence
We recall material more accurately when it matches our current
mood state, a phenomenon called mood congrence.
Depressed individuals exhibit a mood congruence effect for negative
material while non-depressed people show superior recall of positive
information.
Working Memory Model
Working memory involves storing and manipulating information in
short-term memory during reasoning and learning.
It consists of a central executive control system along with two
short-term storage systems - the phonological loop for verbal
content and the visuospatial sketchpad for visual/spatial
representations.
An episodic buffer component integrates information across systems
and with long-term memory.
Factors like word length, semantic similarity, and individual
differences affect working memory capacity.
Parallel Distributed Processing
Information processing occurs through interactions across networks
of simple neuron-like units rather than discrete serial stages.
Activation flows in parallel through interconnected networks.
Knowledge is distributed across links rather than stored in specific
locations.
Serial Position Curve
Superior memory for early list items reflects the primacy effect.
Rehearsal transfers these to long-term storage.
Superior memory for recent items reflects the recency effect since
they remain in short-term memory.
Middle items suffer from reduced rehearsal and displacement from
short-term storage.
In summary, emotion, cognitive load, and serial order all crucially shape
how we encode, retain, and retrieve memories. This highlights the
complex, dynamic nature of memory.
STRATEGIES TO IMPROVE MEMORY
Total time hypothesis - More time spent learning improves retention,
but only if using effective strategies. Simply re-reading is not
sufficient.
Distributed practice - Spreading out practice over multiple sessions
improves long-term retention more than massing practice into a
single session. Known as the spacing effect.
Testing effect - Taking practice tests enhances long-term memory
compared to just re-studying material. Retrieval practice is
beneficial.
Mnemonics - Memory strategies like imagery, organization and
narratives can improve recall. Help structure information
meaningfully.
Mental Imagery
Visual and other sensory images can be generated internally even
when stimuli are not physically present.
Imagery likely relies on analog codes that preserve stimulus
relationships rather than abstract descriptions.
Mental images demonstrate perceptual-like properties:
Rotation time depends on degree of rotation, reflecting spatial
organization.
Judging shape or scanning distance takes more time for dissimilar
shapes or longer distances, paralleling perception.
Images in same modality interfere with concurrent perception,
indicating shared processing.
Ambiguous figures are sometimes difficult to reinterpret in imagery,
suggesting analog format.
Overall, imagery acts as a powerful, perception-like mnemonic
strategy. But some symbolic recoding may also occur.
In summary, memory can be enhanced through distributed, elaborative
practice and mnemonics that leverage the power of mental imagery and
organization. Imagery reflects quasi-perceptual representations aiding
retention.
