New Educational Neuroscience: A field between false hopes and … · 2016. 6. 21. · When...
Transcript of New Educational Neuroscience: A field between false hopes and … · 2016. 6. 21. · When...
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Elsbeth Stern
Research on Learning and Instruction
21.06.2016 1
Educational Neuroscience: A field between false
hopes and realistic expectations
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21.06.2016
Evolutionary perspective on humans:
Brain of stoneage people
but can nonetheless construct
and use computers
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Years ago some fundamental steps were made in
Human intellectual development
40.000: Last fundamental changes in genes that guide
brain development
5.000: Use of script
3000: Use of number symbols
2200: Concept of density (Archimedes)
800: Arabic number system common in Europe
400: Analytic geometry (Descartes)
300: Laws of mechanics (Newton)
The miracle of condensed learning through schooling
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We do not enter the world with a brain that resembles an
empty vessel
Our brain is prepared for an (almost) effortless learning of the
basic principles of the physical and social world:
Core knowledge (instinct)
And we do NOT know this from brain research but from
infancy research starting in the late 1980th using the violation
of expectation paradigm (Baillargeon, Spelke, Carey,
Wynn…)
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What enables most humans to acquire script
and mathematics within few years?
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Language and unique working memory functions make us
competent
As a consequence, we are better than any other species in
connecting originally independent core knowledge for
constructing complex competencies
Literacy: Core knowledge for object recognition and sound
differentiation are combined (Neural Recycling hypothesis)
Mathematics: combining the approximate number system,
which allows the rough representation of larger sets of
discrete objects with the core system of exact small-number
representation exact representations of small sets
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What enables most humans to acquire script
and mathematics within few years?
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Cultural tools needed for recycling ancient
functions
morpho syllabic
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CIV : XXVI =
104 : 26 =
Challenges that require teacher-guided conceptual restructuring:
2/4 + 1/3 ≠ 3/7
6/7 > 6/8
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Proportional Reasoning a/b = c/d
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Proportional Reasoning a/b = c/d
More is not always more.
It is the ratio, not the difference.
Which of both mixtures will have a stronger taste of orange?
Or do both taste the same?
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Imagine the following study:
40 students, around 12 years old, end of 5th grade, same
school in a middle class neighborhood
All children had the same math teachers during their
entire school career
The children get a test on proportional which contains 6
items, with 3 of them requiring the understanding of
multiplicative relationships (full proportional reasoning)
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Results
20 of the 40 children have an understanding of
multiplicative relationships, 15 of them a robust one
Half of the children do not have an understanding of
multiplicative relationships
All differences have to be traced back to individual
characteristics
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0
2
4
6
8
10
12
0 1 2 3 4 5 6
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Piagetian view: PR requires the transition from the concrete
operational to the formal operational stage
Neo-Piagetian view: Limits on working memory functions
hamper complex mental operations required for PR
Psychmetric View: The more intelligent a student is, the earlier
s/he acquires PR
Cognitive Constructivist view: PR emerges by extending and
restructuring prior conceptual and procedural mathematical
knowledge
Neuroscientific view: PR requires particular structural and
functional characteristics of the brain
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Why do students differ in proportional reasoning (PR)
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Developmental coincidence with other formal reasoning
abilities, e.g., Control of Variables Strategy or Deductive
Reasoning
Formal reasoning strategies do emerge spontaneously at age
10-13 without direct instruction
Weakness of the view:
Stage theories do not model the dynamics of development
Formal reasoning is highly content-specific
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Evidence for the Piagetian view
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Developmental coincidence of working memory functions and
PR (both competencies boost simultaneously)
Correlations of .30-.40 between PR and WM-batteries around
age 12
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Evidence for the Neo-Piagetian view
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Correlations of .40-.50 between IQ and PR at age 12-15
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Evidence for the Psychmetric view
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Prior knowledge is the best predictor of future learning
Longitudinal studies show strong relationships between early
mathematical competencies and (kindergarten, elementary
school) on proportional reasoning and understanding fractions
Condensed knowledge (chunks, facts, procedures) relieves
working memory resources
Relational number concept that goes beyond the counting
function of numbers is the precondition for understanding
proportions and fractions
Number line concept, arithmetic word problems that deal with
the quantitative comparison
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Evidence for the cognitive constructivist view
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Quantitative comparison, seriation, number line
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Positions Presented Positions to be Completed
A B C D E F
Pool of Cards to Choose From for Positions D-F
B
Positions Presented Positions to be Completed
A B C D E F
Pool of Cards to Choose From for Positions D-F
Performance in relational
quantitative reasoning at
age 5 can better account
for mathematical
performance in grade
three than
simultaneously
measured IQ
Domain-specific
knowledge matters
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Explaining variance in PR at the age of 12: Best guess of
the results of a regression analysis
Test % explained incremental
Variance
Tests on relational number
understanding at age 7-9
50
Intelligence test age 12 10
Working memory battery
age 12
-
Formal reasoning problems
age 12
-
Total 60
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Piagetian view: Don’t teach PR before students reach the formal
operational stage. Forget it
Neo-Piagetian view: Consider cognitive load when teaching
proportions, promote chunking and automation to better exploit
working memory
Psychmetric View: Be aware of individual differences within each
age group (some 8 year old understand it, while other 15 year olds
still have difficulties)
Cognitive Constructivist view: Promote conceptual change for
numbers and mathematical operations by presenting problems that
go beyond the counting function of numbers. Once students have
understood principles, foster deliberate practice in order to condense
knowledge
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Advice for teachers when dealing with PR
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0
5
10
15
0 1 2 3 4 5 6
To be expected effects on proportional reasoning at age 12
Behavioral psychological and educational research is
ready for supporting a worldwide implementation of
improved math curricula
Conventional curriculum Improved curriculum
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Electroencephalography (EEG)
Near Infrared Spectriscopy (NIRS)
Functional magnetic resonance imaging (fMRI)
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Evidence for the Neuroscience view: Brain Imaging while solving mathematical problems
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Number problems are ideal for Brain Imaging Research
Parts in the brain are specialized on number processing
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The Mathematical Brain
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They show less activation in the «numerical brain areas»
They show more activation in the frontal lobe because they have not
constructed a Numerical network that allows fact retrieval and quick
inference
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When children suffering from dyscalculia are
presented with arithmetic problems
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Fact retrieval vs computation in 2-digit multiplication
problems (a training study)
Neural underpinnings of fact retrieval: Activation in the
Roland Grabner, now University of Graz
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The Left Angular Gyrus
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fMRI during problem solving
Split PR-score by median
Present the sample with multiplication problems and with
conflicting PR-problems
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What will neuroscientists do with our PR sample?
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Multiplication problems: High PR-achievers will show less
frontal lobe activation and more Left Angular Gyrus activation
than low achievers do
Difficult PR-problems: High PR-achievers will show more
frontal lobe activation than low achievers because they
recognize the conflict between difference and ratio
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Results to be expected
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Expensive but interesting confirmation of what
we already know from behavioral results
The statistical power of the brain-data is much lower than the
power of the behavioral data (IQ, Math test), therefore median
split rather than correlational analysis was conducted. This is a
usual procedure in high impact journals in neuroscience,
although not accepted by journals dealing with learning and
education.
Behavioral learning research helped neuroscientists to make
progress in understanding the human brain.
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They feel called to advise teachers on how to improve
schooling
Teachers, educational decision makers, and journalists hang
on their lips
Many of them are not even aware of behavioral educational
research
Concerns from educational scientists are more than wounded
vanity
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Unfortunately that is not enough for many
Neuroscientists (some with poor, others with good reputation in their field)
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What many neuroscientist would advise to improve PR
can be very different from what cognitive constructivist
recommend
When faced with conflicting PR-problems, high achievers will
show more frontal lobe activation than low achievers
Frontal-lobe = executive functions (EF)
Insufficient EF is the real problem of low achievers, so
let’s train them
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Numerous studies on training working-memory (summarized in
several meta analyses) failed to demonstrate transfer effects of
training working memory
These trainings only produces task-specific effects, or at the
most near transfer
To date this does not prevent Neuroscientists (and unfortunately
also some experimental Psychologists) from recommending
trainings of working memory functions
They should know it better: The brain is not a muscle
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When Neuroscientists deal with fractions
Notation-Independent Representation of Fractions in the Human Parietal
Cortex, Simon N. Jacob and Andreas Nieder, The Journal of
Neuroscience, 8 April 2009, 29(14): 4652-4657.
The authors found: When adults faced with fractions in the scanner, «the
anterior intraparietal sulcus is activated, a key region for the processing
of whole numbers. These findings demonstrate that the human brain
uses the same analog magnitude code to represent both absolute and
relative quantity»
“These experiments change the way we should think about fractions. We
have shown that our highly-trained brains represent fractions intuitively,
a result that could influence the teaching of arithmetic and mathematics
in schools”
Message: Knowledge about fractions is already in the brain, but
mathematics teachers are unable to activate it
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Domain specific knowledge is either ignored or marginalized
Brain activation is considered a cause rather than a correlate of
learning
Fallacy: Whatever stimulates brain activation improves learning
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Why at Educational Neuroscience makes
dangerous
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Transcranial electrical stimulation
Roi Cohen Kadosh
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It emerged around 1995 and the focus was on early education
and on aging
Web of Science: (neuroscience OR brain) AND education 1995-
october 2015: 32,544 articles
In 2015: 1,471
< 5000 behavioral articles
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Educational neuroscience as a field
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Methodological standards of high-impact journals with
«neuroscience» in the title are different from behavioral journals
Small n, not enough power for appropriate statistical analyses
Samples are neither described in detail nor justified
(convenience research)
Problems to be presented during brain imaging have to be
simple and they have to be presented repeatedly
Neural correlates of condensing knowledge (chunking.
automating) can be identified, while meaningful learning cannot
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Problems
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Neuroscience
Synapses
Brain plasticity
Cognitive science
Knowledge
Experience
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Different explanations of identical observations
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loss of neural plasticity
interference in an
increasingly complex
knowledge base
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There are detrimental age effects on storing and
retrieving information from the memory.
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otherwise critical periods
of brain plasticity will be
missed
time should be used for
acquiring basic knowledge
that can be used for later
learning
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Societies should take care of early education,
but why?
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decrease of brain plasticity
in the language area
Negative transfer because of
dominant first language
knowledge
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The younger one is, the easier it is to acquire a
second language
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Seduced by the brain : The brain is a wonderful projection
surface for art, analogies and metaphors - for experts as well
as for novices
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What makes synapses more attractive than
knowledge?
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The garden analogy (agricultural view)
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The agriculture view of the brain: Preparing the
soil for a better harvest by plowing and fertlizing
Improve synaptic plasticity, Brain enhancement
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The garden analogy: Pruning
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In the last years, brain imaging techniques have improved
considerably, which means we can observe structural and
functional neural correlates of learning and behavior in greater
detail
However, we are FAR away even from explaining the
neurophysiological basis of pathological brain stages like
schizophrenia or dementia
When Neuroscientists explain the neural basis of learning they
cite Hebb (1949): “What fires together wires together”
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Respectable Neuroscientists admit that we are
far away from understanding the brain
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Demonstrating importance of prior knowledge
for learning
46
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Daniel built a boat.
Jack flew a kite.
Bob ate an apple.
David went over the roof.
Ralph hid an egg.
Victor set the sail.
Peter wrote a drama.
John pressed the button.
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Who ate the apple?
Who hid the egg?
Who flew the kite?
Who went over the roof?
Who pressed the button?
Who set the sail?
Who built the boat?
Who wrote a drama?
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What happened to your synapses?
Why did your hippocampus fail?
What about your amygdala?
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Noah built a boat.
Benjamin Franklin flew a kite.
Adam ate an apple.
Father Christmas went over the roof.
The Easter Bunny hid an egg.
Christoph Columbus set the sail.
William Shakespeare wrote a drama.
Thomas Edison pressed the button.
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Who ate the apple?
Who hid the egg?
Who flew the kite?
Who went over the roof?
Who pressed the button?
Who set the sail?
Who built the boat?
Who wrote a drama?
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Explaining learning difficulties with the brain is
like…
explaining an air-crash with gravitation
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Some principle remarks
Head of the MINT learning center and expert in philosophy of science
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Different Levels of Description / Explanation
physical
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Different Levels of Description / Explanation
functional
physical
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Different Levels of Description / Explanation
economical
functional
physical
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Different Levels of Description / Explanation
esthetical
economical
functional
physical
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Different Levels of Description / Explanation
Refer to Different Kinds of Entities, Facts and
Frameworks
psychological description of the human mind (mental states,
behavioural criteria, intentional explanations)
neuroscientific description of the human brain (brain states,
physiological / functional criteria, causal explanations)
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The Significance of Neuroscientific Studies for
Psychology (top down)
Neuroscientific Explanations of Cognitive and Learning
Deficits
Dyslexia: Children suffer from impaired phonological
awareness.
Dyslexia may be explained by diminished brain activity in the
temperoparietal areas (Simos et al, 2002).
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The Significance of Neuroscientific Studies for
Psychology (top down)
Neuroscientific Explanations of Cognitive and Learning Deficits
Dyslexia: Children suffer from impaired phonological
awareness.
Dyslexia may be explained by diminished brain activity in the
temperoparietal areas (Simos et al, 2002).
However, neuroscientific research does not give us information
about the contents of treatments and trainings to remediate a
specific cognitive and learning deficit.
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What do we have to know to improve learning
conditions at school? What does the force meter display if 1 kilogram weights are hanged
on both sides?
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The Underdetermination of Neuroscience with
Regard to Learning at School (bottom up)
In order to design learning opportunities at school, educators
have to know students’ knowledge preconditions.
But it is not possible to reduce the description of knowledge
preconditions to descriptions of brain states.
Why?
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The Underdetermination of Neuroscience with
Regard to Learning at School (bottom up)
In order to design learning opportunities at school, educators
have to know students’ knowledge preconditions.
But it is not possible to reduce the description of knowledge
preconditions to descriptions of brain states.
Why?
Because descriptions of cognitive states refer to frameworks
and facts outside the brain, e.g. to mathematical and
physical symbol systems, and to Newton’s third axiom.
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The Underdetermination of Neuroscience with
Regard to Learning at School (bottom up)
Thus, cognitive concepts are indispensable to describe
knowledge preconditions.
Therefore, neuroscientific knowledge about the brain cannot be
sufficient to provide specific instructions for improving learning
opportunities at school.
The Regatta Analogy: What do I have to know to participate
successfully in a regatta?
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The Underdetermination of Neuroscience with
Regard to Learning at School (bottom up)
Therefore, no matter how far neuroscience advances, it
cannot – in principle - provide the specific knowledge
required for planning educational environments.
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2003/2005: In search for
a fruitful collaboration
Elsbeth Stern
Roland Grabner
Ralph Schumacher
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1) Deviant brain functions in children who suffer from dyslexia
or dyscalculia: To what extent have insights from
neuroscience already informed the development of
therapeutic treatments?
2) Neural underpinnings of errors: As learning almost
inevitably goes with making errors, brain activities during
feedback processing and error correction may shed light on
more or less successful learning trajectories.
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Worthwhile Questions
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2016: Topical Issue
Elsbeth Stern
Roland Grabner
Ralph Schumacher
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Deviant brain functions in children who suffer from dyslexia or
dyscalculia: To what extent have insights from neuroscience
already informed the development of therapeutic treatments?
Experts admit: Neural correlates have been identified but there
was no impact on treatment programs
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Worthwhile Questions and answers after 13
years of research
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Neural underpinnings of errors: The EEG-component «error related
negativity» has been further confirmed – by using the flanker task
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Worthwhile Questions and answers after 13
years of research
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Jeffrey Bowers, Cognitive Neuroscience, Psychological Review,
2015: Educational neuroscience only tells us what we know
already or gives us information that is irrelevant. The problems
faced by classroom teachers dealing with learning difficulties can
only be diagnosed and addressed through behavioral methods.
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Mathematics teachers who falsely believe that hydrochloric
acid is a brain transmitter can nonetheless provide effective
classroom practice.
Teachers who are not aware of the difference between
procedural and conceptual knowledge cannot. They will
present practice problems to students who did not undergo
conceptual change.
Nonetheless, learning about the brain in the evolutionary
context will teachers help to better understand difficulties
with academic learning.
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Consequences for teacher education
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are willing to really understand the concepts developed in
cognitive and learning psychology rather than trivializing
them
understand the importance of content knowledge and the
limits of transfer
consider results of brain imaging techniques as correlates
and not as causes of cognitive activities
don’t generalize findings about information processing of
simple tasks presented in the scanner to the complex
competencies to be learned at school
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Educational Neuroscience will have a future if
neuroscientists…
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stop deriving pseudo-scientific educational consequences from
each single experiment
follow the methodological standards that have been
established in behavioral journals (only report findings that
survive appropriate statistical analyses, describe and justify the
sample used)
are aware that learning is an interaction between an individual,
his or her brain, and the demands of the environment
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Educational Neuroscience will contribute to a
unified scientific model of academic learning if
neuroscientist
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Thank you for your neural activation!
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Thank you for your neural activation!
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Thank you for activating
your prior knowledge!
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Stern, E., Grabner, R. & Schumacher, R. (2005). Educational Research and
Neurosciences: Expectations, Evidence, Research Perspectives. Reihe Bildungsreform
Band 13. Bundesministerium für Bildung und Forschung (BMBF).
Stern, E. (2005). Pedagogy meets Neuroscience. Science, 310, 745.
Stern, E. (2005). Brain goes to school. Trends in Cognitive Science, 9, 563-565.
Stern, E., Schumacher, R., Grabner, R. (2014). Neurosciences and Learning. In D.
Phillips (Ed.): Encyclopedia of Educational Theory and Philosophy. (S. 572-574)
Thousand Oaks: SAGE.
The Brain is not Enough. Potentials and Limits in Integrating Neuroscience and
Pedagogy. Analyse und Kritik 29, 2007 (Heft 1), S. 38-46.
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Literature