Lecture 11 Flashcards
What are the three processes of Memory?
- Encoding (put into memory) –>
- Storage (hold in memory) –>
- Retrieval (recover from memory)
- flow of information out and flow of information in are both important
- not just revision, a lot of processes and capacities in our mind rely and interact on our memory
What is the Encoding process in Memory?
Getting information into the memory
Form mental Representation- that aren’t currently present
Paying attention is key - in order to receive and encode info -focusing our awareness and -filtering information around us (otherwise world would be chaotic- convo in loud cafe in bar, and would be impossible to concentrate)- attention also key in perception
Attending to something also implies a state of arousal-too tired or disinterested will lead to failing to encoding information and wont remember it (need to pay attention)
- Too much anxiety or arousal will also impact out memory (stress and memory)
-Key cognitive ability
-need to be able to preserve features of our environment or events in order to retrieve them later
-pre-operational phase where children are bale to begin encoding information via symbolic thought - clear mental representations that aren’t currently present
-infantile amnesia
What do the Levels of processing mean?
Incoming information processed at different levels - impacts memory
Deeper processing = longer lasting memory codes
simplistic model, good starting place thinking about different memory levels and different levels of processing
Encoding levels - Structural, Phonemic, Semantic
-can have a huge impact on the quality of your study- how deep things are embedded in memory and likely hood to stay in memory and able to be retrieved for later
What happens when Deeper processing occurs?
longer lasting memory codes
What are the three encoding levels of processing?
Structural = shallow =shortest memory code = GOUT(see in capitals) Phonemic = intermediate = GOUT rhymes with SHOUT Semantic = deep = thinking about meaning of information = Gout represents a medical condition which represents acute inflammatory arthritis= understand and encode at a deeper level
What is the relationship of retention at 3 levels of processing?
Linear increase in the number of words recognised as the depth of processing went from (structural encoding) –> (phonemic encoding) –> (semantic encoding)
POSTIVE association between the variable
progressively deeper levels of encoding led to progressively better levels of memory and retention
What is the Storage process in Memory?
Maintaining information in memory - and keeping the information there over time
Analogy: Information storage in computers -Encoding=typing on the keyboard, Storing= info onto hard drive, Retrieving= bringing back up on the screen
Information processing theories
-Subdivide memory into 3 different stores:
-Sensory , short term, longterm
What are the 3 different stores Memory storage is subdivided into, as proposed by the information storage theory?
Sensory memory –> Working memory (includes short-term memory) –>
What is Sensory Memory and an example?
Very brief memory of a sensory experience
(sparkler/firesparkler)-makes appear continuous line
-Visual sensory memory (the icon(iconic))
Auditory sensory memory (the echo)
Probably others as well -research less clear
-very large capacity
-very short duration
–about 1/2 a second for icon
- about 1-2 seconds for echo(before disappeared)
What is the Visual sensory Memory?
The icon
Very brief memory of the icon
very large capacity
very short duration - about 1/2 second for icon
What is the Auditory sensory memory?
The echo
Very brief memory of the echo
Very large capacity
very short duration - about 1-2 seconds for echo
What are the 4 aspects of STM Short Term Memory?
- Capacity = Limited : 7 +/- 2 chunks
- Chunk =meaningful unit (e.g. single letter (S); group of letters (ACC); group of words (four score and seven years ago)
- Duration (20-30sec)= Limited capacity and interference
ACTIVE process= requires our Focus - Encoding tends to be Acoustic - Maintenance rehearsal
What is the Capacity aspect of Short Term Memory?
Limited
7 +/- 2 chunks
What is the Chunk aspect of Short Term Memory?
chunk = is a Meaningful Unit
-e.g. single letter (S)
groups of letters (ACC)
group of words (four score and seven years ago)
What is the Duration aspect of Short Term Memory?
20-30 seconds
-Limited capacity and interference
What is the Encoding aspect of Short Term Memory?
Encoding tends to be ACOUSTIC
-maintenance rehearsal
What are the features of the Short-Term Memory: Working Memory view model?
Developed by Baddeley
-Helps to reinforce that the short term memory is not a place, but is an active process that we are doing
Information –> rehearsal –> Long term memory
Auditory rehearsal (phonological loop and storage of maintenance of variable items) and Visual-spatial scratch pad (temporary 20-30 sec image which we can manipulate) down on-top of Executive (control attention, flow info processing, allows higher order information processing-reasoning, problem solving)
-both are subject to interference
some decay out bottom
Contains all 4 aspects of STM:
-has limtied capacity
-has 7 items plus or minus two
What Long-Term Memory LTM section in Memory?
-Have the capacity for Potentially long duration (decades)
-Huge capacity
–Past experiences and events
– Thoughts and feelings
– Skills and abilities
– Identity and sense of self
(this forms our total knowledge, and form an integral part of our being-having and keeping these LTM)
-begs to question whether there are different types of memory systems or different ways of storing different types of information
What are the four sections which are of huge capacity in LTM?
- Past experience and events
- Thoughts and feelings
- Skills and abilities
- Identity and sense of self
What are the 3 ways which cause Long Term Memory (LTM) to change?
- Anatomical change
- Engram
- Patients with brain injury/surgery tell us about link between brain structure and function
What is the impact of anatomical change which causes Long Term Memory (LTM) to change?
Memory trace may reflect alterations in neurotransmitter release at specific sites
What is the impact of Engram which causes Long Term Memory (LTM) to change?
physical memory trace of info in brain
What is the impact of patients with brain injury/surgery who tell us about link between brain structure and function, which causes Long Term Memory (LTM) to change?
Famous surgery patient, H.M.- suffered very severe epileptic seizures
1950s surgery, death in 2008
surgery -was succesful in the regard of reducing seizures
But now No new LTM capacity but working memory intact-cannot put any new events into their explicit memory-now lives in short term memory span of 20-30 seconds
-working memory was largely intact, as well as prior memories, and could form new LT PROCEDURAL memories
-therefore was able to learn how to do new things, but is unable to remember how and when it was he came to learn it
Tells us about which brain structures involved in different aspects of memory (memory functions)
What are the 7 brain structures involved in memory?
- Thalamus - implicated inhabit information
- Striatum - implicated inhabit information
- Pre-frontal Cortex(cerebral cortex) - sensory memory, -largest part of the brain, outer surface
- amygdala-part of the limbic system-central to formation and storage of emotion and emotional states info
- Hippocampus- central role information of declarative (facts) memory and consolidation of memory- part of limbic system
- Brain stem
- Cerebellum-procedural memory- for skills and abilities, knowing HOW to do things
What are the 4 different types of memory systems?
- Explicit memory - Deliberate attempt to remember
- Implicit memory - Exhibited on a task that does not require intentional remembering
- Declarative memory “knowing that”
- Procedural memory “knowing how”
What is Explicit memory?
Deliberate attempt to remember
what we usually think of as memory
What is Implicit memory?
Exhibited on a task that does not require intentional remembering
- without conscious attention of effort
- not great for studying
- e.g. being able to remember waitresses outfit when going to resteraunt
What is Declarative memory?
“knowing that”
memory for facts and events
“knowing what a bicycle is”
What is Procedural memory?
"knowing how" -not so consciously accessible -responsible for all our SKILLS -these skills are Both MOTOR and COGNITIVE (visual puzzle) "knowing how to ride a bike"
What are the 5 dimensions of LTM Long Term Memory?
- Long term memory –>
A. Declarative memory (memory for facts and events) B. Procedural memory (Memory for how to do things)
Aa. Episodic memory (Recollections of specific personal experiences) Ab. Semantic memory (General knowledge)
What is Episodic memory?
Recollections of specific personal experiences
-know we have experienced something before
-require cues about the context in which the memory was encoded
“have i ever had an injection before and when,why,where was it”-piecing together context to provide retrieval cues
What is Semantic memory?
General knowledge
- meanings of words and concepts
- allows us to make cognitive representations/mental models of the world around us
- doesn’t need retrieval cues about the context in order to have that semantic memory - don’t need to know where you were when you learnt what asthma was, more important to know about symptoms, aetiology or disease course- instead need the MEANINGS, the FACTS and the FIGURES
What is the Encoding in LTM Long Term Memory?
Tends to be Semantic or Episodic - encoded by meaning at a deeper level Can be acoustic, verbal or visual Enhanced by: 1. Elaborative rehearsal 2. Visual imagery 3. Self-referential encoding 4. Encoding specificity
What are the 4 things that enhance encoding in LTM long term memory?
- Elaborative rehearsal
- Visual imagery
- Self- referential encoding
- Encoding specificity
What are the 3 ways of retrieval in LTM Long Term Memory?
- Recall
- Recognition
- Reconstruction - piecing memory together from a few highlights then filling in details based on what we think should have happened
Tip-of-the-tongue phenomenon