wk 9 Flashcards
evidence from neuropsychology: episodic memory is progressively impaired in ______ ______, whereas semantic memory is progressively impaired in ______ ______.
Alzheimer’s disease
semantic dementia
Within nondeclarative memory, distinctions are made between procedural memory, which is responsible for skills that are learnt through practice, like tying your shoes or riding a bike, and ______, which is an improvement in processing of an item due to prior exposure to that item (but without requiring awareness of that the item was previously encountered)
priming
in amnesia, previosly learnt semantic info is…
new semantic info is…
preserved, aquasition of new semantic info is largely impaired
semantic dementia:
Progressive loss of semantic knowledge
(relatively intact anterograde episodic memory)
typical types of test in semantic memory
Category fluency
matching tests
which type of LTM is preserved in Anterograde amnesia
procedural
Priming
Improvement (speed/accuracy) in processing a stimulus (identification/production/classification) as a result of a prior encounter with the same or a related stimulus.
Type of tests to test priming
Perceptual identification (name object obscured by noise)
Word-stem/fragement completion (first word that comes to mind)
Sentance completion
3 degree of conscious awareness (Tulving)
Autonoetic (self aware) episodic
Noetic (aware of info, not origin)
Anoetic (unaware)
Amnesic patients usually show intact perceptual ______
priming
what did Penfield (1958) find about forgetting and how
Stimulating temporal lobes of patients often elicited trivial memories.
Concluded that brain retains a permenant record of all experiences
What did Ebbinghaus (1885) find about memory
Why does this happen
learned 169 diff lists, relearned each after an interval of 21 mins to 31 days. time to relearn list 100% measure of forgertting.
Showed a logarithmic curve (kind of plateaud as time went on)
Decay + interference
Tulvings Encoding specificity principle
Retrieval success depends on ‘informational overlap’ between encoding and retrieval
Consolidation as a theory of forgetting
= the glutamate release, protein synthesis, neural growth and rearrangement. Fixes info in LTM
this is selective
All theories of forgetting
Decay
Interference
-Retrieval failure
-Repression
-Consolidation failure