Memory (Part 3) Long Term Memory Flashcards
Long-term Memory
Long-term memory is available for longer durations and can be retrieved at later stages in peoples’ lives
Long-term memory is not just one big store, but it is composed of multiple systems
Long-term memory
Declarative (explicit) memory
what? why? when? where? who?
knowledge, facts, locations
conscious access
hippocampus-dependent
Long-term memory
Non-declarative (implicit) memory
how?
motor skills, cognitive skills
unconscious access
not hippocampus-dependent
Declarative memory (semantic)
what, why?
General knowledge of facts about the world
Absence of the specific circumstances of when the knowledge was acquired
Declarative memory (episodic)
when, where
knowledge of events, including our own lives
autobiographical memory
The several systems of long-term memory (implicit)
Implicit LTM can also be divided into several different memory systems
They have in common that we do not have a conscious recollection of how we learned – but we just get better with experience and practice!
procedural
priming
classical conditioning
non associative
Procedural memory
Procedural memory is our memory for skills
motor skills
cognitive skills
- e.g. drawing, sports
- e.g. learning to speak (first years)
Priming
Priming refers to forming automatic associations
Change in ability to identify stimulus as result of prior exposure
Repetition priming: e.g. prior exposure to word in lexical decision task
Associative/semantic priming: related word: e.g. “nurse” primes “doctor”
Priming occurs masked and unmasked
Classical Conditioning
associative learning
attend to neutral stimulus after association with meaningful stimulus
a new stimulus when paired with an unconditioned stimulus over many trials produces a conditioned response all on its own
Non-associative
habituation and sensitisation
Habituation: ignore a stimulus because it is trivial
e.g. background noise
Sensitisation: attend to a potentially threatening stimulus
e.g. snakes
Proactive interference:
prior (old) learning interferes with new learning
e.g. friend’s maiden name interferes with new name
Retroactive interference:
more recently learned information (new) interferes with previous learning (old)
e.g. new phone number interferes with remembering old phone number
Amnesia
Amnesia refers to deficits in memory caused by brain damage, disease, drug abuse, or psychological trauma
One can distinguish between two types of amnesia
Patients suffering from amnesia can show very selective memory deficits. This can provide support for Dissociations between memory systems:
between short-term and long-term memory
between declarative and non-declarative memory
between semantic and episodic systems
Retrograde amnesia
is the inability to remember knowledge acquired before the brain injury
Anterograde amnesia
The inability to remember anything since the brain injury
The inability to acquire new knowledge (impedes learning)