Memory Flashcards
Encoding
Translation of the physical stimulation into a cognitive code that is used by memory system (usually requires attention)
Storage
Maintenance of cognitive codes in memory over time
Retrieval
Recovery of cognitive codes from memory.
Free-recall Task
Report as many items from a list of words in any order
Serial Position effect
Consistent curve (U-shaped) observed for list recall.
Primacy Effect
Items near the beginning of the list recalled better than other items
Recency Effect
Items near the end of the list are recalled better than other items
Sensory Memory
Temporary storage of perceptual input for initial memory encoding.
Encoding –> modality specific
Storage
Capacity —> high
Duration —> very short, 0.5 - 4 sec depending on modality
Retrieval —> attentional
Forgetting —> decay
Working Memory
Current processing and manipulation of cognitive codes (conscious processing)
Encoding —> phological, visual, spatial
Storage
Capacity —> 5-9 items
Duration —> less than 30 sec without rehearsal
Retrieval —> elaborative rehearsal
Forgetting —> interference and decay
Long Term Memory
Permanent memory of information represented in the brain.
Encoding —> several forms
Storage —> episodic, semantic, procedural
Capacity —> unlimited
Duration —> permanent
Retrieval —> reconstructive
Forgetting —> retrieval failure
Iconic memory
Vision
Echoic Memory
Auditory
Names reflect that the representation is a raw sensory code.
Whole Report (WR)
Identify all items
Brief display (50 msec)
4-5 items
Partial Report (PR)
Identify subset of items cued after the offset of display. Higher report at short cue intervals
PR = WR report after 0.5 sec.
Cannot cue for category (letters versus numbers) so raw sensory.
Articulatory/ Phonological Loop
Predominant memory code seems to be phonological —> rehearsal mechanism.
Rehearsal based on neural mechanism referred to as the articulatory/phonological loop.
Acoustic image from Wernicke’s area passed to Broca’s area for subvocal articulation which refreshes acoustic images and forms the look.
Conduction aphasia supports