Midterm Flashcards
Key feature of infantile amnesia
It involves adults failing to recall autobiographical memories of their early life
Mobile conjugate reinforcement paradigm
(Rovee-Collier, 1989) Babies 2 to 3 month old babies showed evidence of retention; learning was context specific; evidence of declarative memory in infants younger than 7 months
Deferred imitation task
(Meltzoff, 1985) 14-month-old infants showed evidence of deferred imitation; improvement in deferred imitation as age increases; other studies (i.e. Collie & Hayne, 1999) showed evidence of deferred imitation in 6-month-olds
Declarative memory in infants
Shows up almost immediately; only accessible to language; develops rapidly over the first two years of life
Four principles of infant memory development
(Hayne, 2004) 1. Older infants typically encode or store information faster than younger ones 2. Older infants remember information for longer retention intervals than younger ones 3. Older infants make use of a greater variety of retrieval cues than do younger ones 4. Forgotten memories can be retrieved when a reminder is presented
Schacter and Moscovitch’s cognitive neuroscience theory of infant memory development (1984)
Implicit memory is controlled by an early-developming memory system in the brain that might be present at birth; Declarative memory depends on a late-developing memory system in the brain that reaches maturity between 8 to 10 months of age
Richmond and Nelson’s cognitive neuroscience theory of infant memory development (2007)
Studied the areas of the brain that are involved in implicit memory and in declarative memory and when they develop
Why does declarative memory in children become better during the process of development?
(Siegler, 1998) 1. Capacity of short-term memory or working memory may increase over the years 2. Children develop more memory strategies as they develop, and they learn to use those strategies more effectively 3. Older children possess more knowledge than younger ones, and this makes it easer for them to learn and to remember new information 4. Metamemory develops over the course of childhood
Developmental changes of working memory
Gathercole, Pickering, Ambridge, and Wearing (2004); Progressive improvements year by year in all three components of the working memory system; the structure of working memory was fairly constant across the years of childhood
Metamemory
Knowledge about one’s own memory and an ability to regulate its functioning
Verbatim trace
(Brainerd and Reyna, 2004); a memory trace that contains accurate and detailed information about to-be-remembered stimuli
Gist memory trace
(Brainerd and Reyna, 2004); a memory trace that contains a considerable amount of semantic information about to-be-remembered stimuli
When does increased age become associated with errors in memory?
(Brainerd and Reyna, 2004); 1. The learning task leads older children to produce more gist memory traces than younger ones 2. The memory test requires verbatim recall or recognition 3. Greater gist memory increases the likelihood of false recall or recognitions of information very similar in meaning to the to-be-recalled information
When is using gist memory a disadvantage?
When the memory test requires verbatim recall or recognition
Infantile Amnesia according to Howe and Courage (1997)
Infants can only form autobiographical memories, after they have developed a sense of self to whom events having personal significance can occur
Infantile Amnesia according to Fivush and Nelson (2004)
Social cultural developmental theory; language and culture both play central roles in the early development of autobiographical memory
Why do children produce systematically distorted reports of events when exposed to suggestive influences?
(Roebers & Schneider, 2005); Social compliance: young children might yield to social pressure and a lack of social support even when their own recollection is accurate; Cognitive incompetence: young children might come to believe their own distorted memory reports because of limitations in processing, attention, and language
Anterograde amnesia
A problem in encoding, storing, or retrieving information that can be used in the future
Retrograde amnesia
A problem accessing events that happened in the past
Post-traumatic amnesia (PTA)
Patients have difficulty forming new memories. Often follows a severe concussive head injury and tends to improve with time
Transient global amnesia (TGA)
Apparently normal individuals suddenly develop severe problems in forming and retrieving new memories. The cause is unknown and the condition tends to resolve relatively rapidly.
Classic amnesia profile
Preserved intellect and language coupled with a dense impairment in the capacity for episodic learning, whether tested visually or verbally, and whether by recall or recognition
Possible causes of amnesia
Bilateral damage to the temporal lobes and hippocampus, Korsakoff syndrome, prolonged anoxia, and encephalitis resulting from brain infection
Korsakoff syndrome
Patients have difficulty learning new information, although events from the past are recalled. There is a tendency to invent material to fill memory blanks. Most common cause is alcoholism, especially when this has resulted in a deficiency of vitamin B1.
Do amnesiacs show normal classical conditioning?
Yes
Working memory in amnesiacs
Preserved
Semantic memory in amnesiacs
Preserved; although the capacity to add new information to semantic memory is typically defective
Implicit memory in amnesiacs
Preserved, as measured by studies of priming, procedural learning, or classical conditioning (Warrington and Weiskrantz, 1968; Corkin, 1968; Cohen & Squire, 1980)
Rate of forgetting in amnesiacs
Unimpaired
Source amnesia
Characteristic difficulty that amnesic patients experience in recollecting the source of a given memory
Ribot’s law
Older memories are more durable than those acquired more recently
Personal semantic memory
Factual knowledge about one’s own past
Assumption of the standard model of retrograde amnesia
The hippocampus and surrounding regions play a crucial role in memory consolidation. These regions also act as an intermediary, detecting and storing novel information at a relatively rapid rate, then holding it while it is gradually transferred to more cortical areas.
System consolidation
The process whereby information is consolidated within the brain by a process of transfer from one anatomically based system to another
Multiple Trace Hypothesis
(Nadel and Moscovitch, 1997, 1998); Alternative theory of retrograde amnesia; argues that the hippocampus plays a role in both retrieval and encoding; assumes that the process of long-term consolidation sets up recorded traces of experience within the hippocampal complex, rather than the neocortex.
Traumatic brain injury (TBI)
Caused by a blow or jolt to the head, or by a penetrating head injury. Normal brain function is disrupted. Severity ranges from “mild” to “severe”
What happens when patients recover from the temporary condition of PTA?
Typically, first recover personal knowledge, place, and temporal orientation; persistent problems of episodic memory tend to remain
Positivity bias
The tendency, increasing over the lifespan, to recall more pleasant memories than either neutral or unpleasant ones
Mather and Carstensen (2005)
Argue that as we get older and life grows short, people focus more on maintaining a sense of well-being, and less on goals concerning knowledge and the future
Emotion regulation
Goal-driven monitoring, evaluating, altering, and gating one’s emotional reactions and memories about emotional experiences
Repression
In psychoanalytic theory, a psychological defense mechanism that banishes unwanted memories, ideas, and feelings into the unconscious in an effort to reduce conflict and psychic pain. Theoretically, it can be either conscious or non conscious.
Intentional forgetting
Forgetting arising from processes initiated by a conscious goal to forget it
Psychogenic amnesia
Profound and surprising episodes of forgetting the events of one’s life arising from psychological factors, rather than biological or dysfunction.
Directed forgetting
The tendency fo an instruction to forget recently experienced items to induce memory impairment for those items
Item-method directed forgetting findings
(Basden) Recall for to-be-forgetten words is often substantially impaired, relative to to-be-remembered items; reflects deficits in episodic encoding
Explanation behind findings of item-method directed forgetting
Remember instruction: triggers elaborate semantic encoding; Forget instruction: gives permission to simply release the word from rehearsal
List-method directed forgetting findings
(Basden) 1. When participants believe that they can forget the first list, they often do much better at recalling the second list on the final test, compared to the remember group, 2. “Forget” instructions impair people’s recall of items from the first list, compared to performance in the remember condition, reflecting a cost of a forget instruction; reflects a retrieval deficit
Mechanisms underlying list-method directed forgetting
Retrieval inhibition hypothesis and context shift hypothesis
Retrieval inhibition hypothesis
An instruction to forget the first list inhibits list-one items, impairing recall; inhibition merely limits retrieval by reducing activation of unwanted items
Context shift hypothesis
Instructions to forget mentally separate the to-be-forgotten items from the second list; to-be-forgotten items should be recalled more poorly because the new context is a poor retrieval cue for them
Motivated context shift
Occurs as an effort to limit awareness of a memory by avoiding contexts that may act as cues for the memory.
Why does using a motivated context shift work?
- By avoiding reminders, the person deprives a memory of retrievals that ordinarily strengthen and preserve it (Erdelyi, 2006); 2. By changing environmental context, the incidental context within which one operates should mismatch the one in which the event took place, hindering retrieval
Cognitive control
The ability to flexibly control thoughts in accordance with our goals, including our ability to stop unwanted thoughts from rising to consciousness
Think/no-think (TNT) paradigm
A procedure designed to study the ability to volitionally suppress retrieval of a memory when confronted with reminders.
Total memory control effect
(Anderson and Levy, 2008); a person’s intention to control retrieval alters retention; occurs as a result of TNT
Positive control effect
The enhanced memory for “think” items above baseline recall; caused by intentional recall; occurs as a result of TNT
Negative control effect
The memory deficit for “no think” items below baseline recall; due to participants intentionally shutting down retrieval; occurs as a result of TNT
Brain mechanisms underlying retrieval suppression
(Anderson et al, 2004); Reduced hippocampal activity, indicates that people can intentionally regulate hippocampal activation to disengage recollection
Psychogenic fugue
A form of psychogenic amnesia typically lasting a few hours or days following severe trauma, in which afflicted individuals forget their entire life history including who they are
Spontaneous recovery
(Pavlov, 1927; Rescorla, 2004); the term arising from the classical conditioning literature give to the reemergence of a previously extinguished conditioned response after a delay; similarly, forgotten declarative memories have been observed to recover over time
Reminiscence
(Ballard); the remembering again of the forgotten, without learning or a gradual process of improvement in the capacity to revive past experiences
Hypermnesia
(Erdelyi); The improvement in recall performance arising from the repeated testing sessions on the same material
What factors affect hypermnesia?
Visualization, reconstruction; largest on free recall tests; increases with increasing number of recall tests
Incidental forgetting
Memory failures occurring without the intention to forget
Motivated forgetting
A broad term encompassing intentional forgetting as well as forgetting triggered by motivations, but lacking conscious intention
Forgetting curve/retention function
The logarithmic decline in memory retention as a function of time elapsed, first described by Ebbinghaus
Permastore
(Bahrick, 1984); used to describe stable language learning performance; appears that forgetting occurs only up to a certain point, but beyond that memory traces appear to be frozen
What is overall retention determined by?
The level of initial learning
Accessibility
The ease with which a stored memory can be retrieved at a given point in time
Availability
The distinction indicating whether a trace is or is not stored in memory
Jost’s law
If two memories are equally strong at a given time, then the oldest of the two will be more durable and forgotten less rapidly
Consolidation
The time-dependent process by which a new trace is gradually woven into the fabric of memory and by which its components and their interconnections are cemented together
Synaptic consolidation
The imprint of experience takes time to solidify because it requires structural changes in the synaptic connections between neurons
Systemic consolidation
The hippocampus is initially required for memory storage and retrieval but its contribution diminishes over time until the cortex is capable of retrieving the memory on its own
How can you keep personal memories resistant to forgetting?
Retrieve them periodically
Interference
The phenomenon in which the retrieval of a memory can be disrupted by the presence of related traces in memory
Trace decay
The gradual weakening of memories resulting from the mere passage of time
Factors that encourage incidental forgetting
Passage of time, contextual fluctuation, interference
Contextual fluctuation
The gradual drift in incidental context over time, such that distant memories deviate from the current context more so than newer memories, thereby diminishing the former’s potency as a retrieval cue for older memories
Competition assumption
(Anderson, Bjork, and Bjork, 1994); The theoretical proposition that the memories associated to a shared retrieval cue automatically impede one another’s retrieval when the cue is presented
Cue-overload principle
(Watkins, 1978); The observed tendency for recall success to decrease as the number of to-be-remembered items associated to a cue increases