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This overview of memory processes explores key concepts including encoding, storage, and retrieval systems. It highlights the differences between sensory memory, short-term memory, and long-term memory. Key experiments, like the serial position curve and Sternberg's retrieval tasks, illustrate how information is retained and forgotten. Neurological studies shed light on phenomena such as anterograde and retrograde amnesia, enhancing our understanding of memory functioning. This model provides a framework for comprehending the complexities of memory storage and recall dynamics.
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Basic Terminology • Encoding • Storage • Forgetting
Figure 4-1 (p. 132)The model view of memory. Each box depicts a memory storage system. The arrows represent the transfer of information between systems.
Recency effect Primacy effect Figure 4-2 (p. 132)Word list for a serial position curve experiment (A); typical results (B). Free-Recall Experiments
Sensory Memory • Icon (visual) • Experiment: partial-report technique R S K L P E C Q G T B M
Sensory Memory • Echo (auditory) • Similar to icon, BUT: • Recall can be cued by category • Echoes hava a larger capacity? • Echoes can last longer (up to 20 secs)
Summary of Sensory Memory • Sensory memories • are modality specific • have relatively large capacity (although short storage time) • are relatively unprocessed (mostly physical, not meaningful, aspects)
Short-Term Memory vs. Long-Term Memory • Time info stored • Capacity • Coding (form of storage) • Ways info retained or forgotten • Ways info retrieved
Short-Term Memory • Capacity • Miller’s “7 (plus or minus 2)” • Chunking M T V C B S F B I N F L
P ? F Short-Term Memory • Coding B
Short-Term Memory • Forgetting • Retention duration • Memory trace • Is forgetting caused by decay or interference? • Peterson-Brown task • The challenge • Probe-digit task
Short-Term Memory • Retrieval • How do we find information stored in memory? • Sternburg’s experiment
A H D E L Sternburg experiment Predictions Step 1 Parallel search Step 2 A H D E L D D?
A H D E L Sternburg experiment Predictions Step 1 A D? H Step 2 D D Serial serach
A D? Sternburg experiment Predictions Self-terminating search Exhaustive search Serial serach
Short-Term Memory • Retrieval • How do we find information stored in memory? • Serial search or parallel search? • Types of serial searches • Self-terminating search • Exhaustive search • Winner? Serial, exhaustive search
Working Memory Working Memory Central executive Visuospatial Sketch pad Phonological loop
Neurological Studies H.M. case
Neurological Studies • Anterograde amnesia • Retrograde amnesia
Figure 4-11 (p. 156)The filled circles designate activations in the verbal task, and the squares indicate activations in the spatial task.
Outline • Basic terminology • Modal view of memory • Free-recall experiments • Sensory memory • Working memory • Neurological studies