chapter 7 memory Flashcards
(38 cards)
what is amnesia?
the loss of memory or memory abilities caused by brain damage or disease
what is retrograde amnesia?
loss of memory for events before brain injury
- but there is something called gradient across time, this means that. memories that are more distant in time from brain damage are less impaired by the amnesia
what. is anterograde amnesia?
disruption of memory for events occurring after brain injury
- affects it right away once you read something you forget
what is sensory memory?
lasts for a very short time less than a second
what is short term memory?
retains information temporarily for about a minute
what is long term memroy?
stores information for a lifetime
what is explicit memory?
memories you are aware of, which can be declared or explained
what is episodic memory?
memory of specific events and experiences
what is semantic memory?
memory of facts and concepts
what is implicit memory?
unconscious
- memories that influence behaviour without conscious awareness
what. is procedural memory?
skills and tasks like riding a bike
During anterograde amnesia what memory is impaired?
semantic memory
what is perceptual priming? also called repetition priming this is a form of implicit memory
exposure to a stimulus will facilitate a future response (more quickly or more accurately) to the same stimulus
example: if you see the word “apple” you are more likely to recognize it faster when you see it again, even if it shown very quick or in fragments (eg A_ _ L E)
what is conceptual priming or also known as semantic priming? this is a form of implicit memory
exposure to a stimulus will facilitate a future response to a new stimulus closely related to it
example if you are shown the word DOCTOR you will respond to the word NURSE quickly as they are semantically related
What did the Warrington and Wieskrantz study reveal about explicit memory in amnesic patients?
explicit memory: amnesic patients performed worse than healthy individuals on free recall and recognition tasks
implicit memory: amnesic patients performed equally well as healthy individuals on the word fragment completion task, showing they retained implicit memory
conclusion: amnesic patients lacked explicit memory for the words but retained implicit memory of them
why do people forget?
interference
- people forget information because of competition from other material like meeting multiple people at a party
what is proactive interference?
its when you try to remember something from time 2 but end up recalling time 1 instead
what is retroactive interference?
when you attempt to recall information from time 1 but recall time 2 instead
what is the serial position effect?
high recall: The recency effect is when you can remember the last few words of a list because it is still is short-term memory
intermediate recall: primacy effect, is remembering items at the beginning of the list because you see them more, and they are in long-term memory
low recall: middle items
- words in the middle of the list are more complex to remember because they are disrupted by proactive interference and retroactive interference
how do we remember?
using cues to aid retrieval
context-dependent memory (encoding specificity)
reinstating the context of an event
(Everyday example:
* You visit a place in which you grew up (or a place where you used to live) and
recall many events that you have never thought of in years.
* A case of recovered memory
* JR reported that following viewing a movie involving sexual abuse, he
suddenly remembered incidents of being molested by a priest on camping
trips when he was an adolescent.)
what is the misinformation effect?
The misinformation effect occurs when a person’s memory of an event is altered by misleading information presented after the event has occurred.
This can lead individuals to recall details incorrectly or remember events that never actually happened.
what is sensory memroy?
it is the very brief and initial stage of memory that holds information from the environment through the five senses, for a very short time, typically less than a second.
- usually 0.3 for visual information
- 2 sec for auditory info
- has a large capacity but information is lost unless you focus on it
What is short term memory?
stores sounds, images and words
- stores information for about 20-30 seconds
- average people can hold 7 items in short term memory
- information is kept here through rehearsal or repeating in head if not it is forgotten
what is another name for sensory memory?
- iconic memory
- afterimage