week 11 Flashcards
Infantile amnesia
First 3 years of life important for development of concepts (semantic memory) and language.
Older children and adults recall very few autobiographical memories from these early years.
Even when we feel sure we can remember events from these years, they often turn out to have happened to somebody else (e.g. a younger sibling) (Bjorklund & Bjorklund, 1992).
But children of 1-3 show emerging ability to recall temporally ordered information (Bauer et al., 2000).
How to explaininfantile amnesia?
Freud repression of emotionally traumatic events of early childhood.
Need language to form autobiographical memories?
Offset of infantile amnesia corresponds with period of rapid language acquisition.
Memories more accessible when encoded verbally (Hayne, 2004)
Early memories coded entirely in terms of physical action and sensation i.e. different storage format.
Simcock & Hayne (2002): Magic Shrinking Machine experiment.
27, 33, 39 month-olds
Memory for machine tested after 6 & 12 months.
Children showed good memory when tested non-verbally (e.g. with pictures)
Could only describe it using words they had at T1 (could not use new words they had acquired).
Knew how machine worked when presented
Inability to translate early, preverbal experiences into language?
How to explaininfantile amnesia?
Cognitive sense of self emerges around 2 years old necessary for retrieval of autobiographical memories?
Self as information organiser
Infantile amnesia due to lack of knowledge about the world.
Young children focus on what is similar about actions/events (form mental schema/ scripts).
These scripts are not good retrieval cues for novel events.
Memories at this age are fragmented no overarching framework
Developmental Limitations in Information Processing
Brainerd (1983)
Encoding limitations
Computational limitations
Retrieval limitations
Storage limitations
Work-space limitations
Attention
State of alertness, aspect of environment focused on (Kahneman, 1973)
For information to be processed it must be attended to
Ruff & Lawson (1990)
1- to 3-year-olds
Increase in attention paid to stimuli as age increases
Children’s Attention
(Vurpillot, 1968)
< 5 years – only examined a few windows, few comparisons, lots of errors.
6+ years – more likely to examine pairs
6 to 9 years – strategy develops to compare all windows
Encoding Strategies: Rehearsal
Repeating information
Flavell et al. (1966)
5-, 7- and 10-year-olds
Seven pictures
Lip reading measured
15 second delay – recall
>50% of 7-year-olds and majority of 10-year-olds rehearsed pictures
More rehearsal greater number of pictures recalled
LIMITATION
Self-report of strategy increases number of children 39-74% (McGilly & Siegler, 1990)
But rehearsal in children not always effective (Ornstein et al., 1975)
Encoding Strategies: Organisation
Linking information together can aid encoding
Moely et al. (1969)
Children provided with pictures – mixture of animals and furniture asked to memorise
>10-year-olds re-arranged pictures
Encoding Strategies: Elaboration
Foley et al. (1993)
6- and 9-year-olds
More unusual an association, more likely it will be to aid memory
Static to active elaborations (Buckhalt et al., 1976)
‘Black ant crawled over comb’ vs ‘black ant used a comb to fix his hair’
Memory Development: Retrieval
Similar to encoding processes in development – gradual
Recall and recognition
Evidence for recognition in very young infants?
Familiarisation/novelty-preference technique in infants
Memory Development: Retrieval part 2
Memory Development: Retrieval
Kreutzer et al. (1975)
5- and 10-year olds told a story
Age of dog, other presents received that same year, working back from most recent Christmas present to others
< 50% 5-year olds able to generate a strategy
All of 10-year-olds able to
Kobasigawa (1974)
6, 8 & 11 year olds
Memorised 24 pictures in 8 categories (cue cards)
At recall – shown cue cards
Only 1/3 6 year olds used cue cards
8 year olds used cards but only recalled one item per card then moved on
11 year olds recalled all for each card then moved on
Best strategy.
How do memory strategies develop?
Gradual progression
Children can be taught more effective strategies, but poor at generalising
E.g. 6 year olds taught to use rehearsal (Keeney et al., 1967)
Taught strategy may use up child’s limited processing capacity
E.g. use strategy but recall didn’t improve (Bjorklund & Harnishfeger, 1987)
With development processing capacity improves, but also knowledge
E.g. Elaboration requires knowledge of world.
Metacognition
“a person’s awareness of his or her own cognitive abilities and limitations” (Smith et al., 2003, p.437)
Adults aware that memory is limited
Older children greater awareness of own abilities
Card memory task (Flavell et al., 1970)
Source Memory
Memory for information about how a memory is acquired (Schacter et al., 1991)
Perceptual info e.g. colour of objects seen
Temporal info, e.g., order events occurred
Emotional info, e.g., how you felt during event
Processes surrounding source memory is called source monitoring.
Depends on how well information is encoded and bound together.
Direction of attention (towards self or towards other) affects source monitoring and recognition memory. (Johnson et al., 1996)
Kovacs & Newcombe (2006)
Four- and five-year-olds listen to speakers on audiotape.
“I hate snakes” “I really like going to the library”
Either had to say if they felt the same way – self-focus or say how the speaker feels – other focus.
e.g., “Do you feel the same way as my friend?” or“How does my friend feel about that?”
Then heard various statements—both old and new.
Saywhether they had heard the statements before.
If yes, asked to indicate who made the statements.
Self-focus – better recognition memory, but worse sourceaccuracy.
Other focus- better source accuracy, but worse recognitionmemory.
Effect most apparent for 5-year-olds.
4-year-olds struggled withdemands ontask.
So, focusing on your own emotions helps youremember,
Butfocusing on the speaker’s emotions helps you remember who said it.
Profile of children with WM deficits
Constant profile (Gathercole, 2008)
Slow to learn in maths/reading (Gathercole & Pickering 2000; Jarvis & Gathercole, 2003)
Struggle with structured tasks (e.g. Gathercole, Durling et al. 2008).
Problems with activities that require both storage and processing (Gathercole, 2008).
Rarely identified as having memory problems (Gathercole et al., 2006); more often described by teachers as having attention problems.
Appear to be inattentive, have short attention span and be easily distracted.
Identification of WM deficits
Forward digit span/Backward digit span
Corsi Blocks tests
Working Memory Test Battery for Children (Pickering & Gathercole, 2001)
Automated Working Memory Assessment (AWMA; Alloway, 2007)
Classroom observations (WMRS: Alloway, Gathercole, Kirkwood, 2008)
Working Memory Training? Holmes et al. (2009)
Learning in children with low WM capacity is hindered by frequent WM overload in learning activities (Gathercole & Alloway, 2008)
80% children below 10th centile for WM have substantial reading or maths problems, or both.
WM highly heritable, appear to be unchanged by environmental factors.
Claims of sustained improvements using Robomemo in kids with ADHD (Klingberg et al., 2005) and adult neuropsychological patients following stroke (Westerberg et al., (2007)
Therefore can Robomemo help support primary schoolchildren with WM problems?
Evaluating WM TrainingHolmes et al. (2009)
Pre- and Post- training assessments: Working memory (7 subtests from AWMA); General ability From Wechsler Abbreviated Scales of Intelligence (verbal and performance IQ; basic reading; mathematical reasoning)
Intensive training:
35 minutes a day;
at least 20 days;
in a period of between 5 to 7 weeks.
Motivational features: positive verbal feedback; display of the user’s best scores; the accumulation of ‘energy’ based in performance levels that was spent on a racing game completed after training each day.
Two groups: Adaptive versus non-adaptive version. Non-adaptive, tasks set to lowest level – two (all pre-training levels of these kids were above two).
Holmes et al. (2009)
Three criteria set out in advance:
Benefits extend to the many kids with low WM;
The gains generalise to a wide range of non-trained assessments (including classroom relevant tasks);
Leads to detectable gains in academic achievement.
Gains generalised to independent and validated WM assessments that were not trained
Biggest gains for tests involving either the storage of visuo-spatial material, or the simultaneous storage and manipulation of either visuo-spatial or verbal material.
A small, significant boost to mathematics performance was found 6 months following adaptive training, but not other areas of academic attainment.
Evaluating WM TrainingDunning et al. (2013)
Randomised control trial (RCT) 7-year-old children randomly assigned to adaptive training, non-adaptive training, or no training conditions.
Adaptive training associated with gains in selected working memory tasks (especially verbal tasks).
Gains sustained after 1 year.
No evidence of gains in classroom tasks involving high working memory loads or in any other cognitive assessment.
Concluded benefits of working memory training may not extend beyond specific working memory tasks.
Historical View
Eyewitness accounts from Children at Salem witch trials
The “most dangerous of all witnesses” and “their testimony should be excluded from court record wherever possible” (Baginsky, cited by Whipple, 1911, p.308)
Early influence of Freud, false recall of abuse as adults (Powell, 1994)
Children thought to be highly suggestible
Children’s Suggestibility
Suggestibility = tendency to change memory or beliefs in response to questioning (Ceci & Bruck, 1995)