The future of functionally-related structural change assessment
Open accessAbstract
The brain is continually changing its function and structure in response to changing environmental demands. Magnetic resonance imaging (MRI) methods can be used to repeatedly scan the same individuals over time and in this way have provided powerful tools for assessing such brain change. Functional MRI has provided important insights into changes that occur with learning or recovery but this review will focus on the complementary information that can be provided by structural MRI methods. Structural methods have been powerful in indicating when and where changes occur in both gray and white matter with learning and recovery. However, the measures that we derive from structural MRI are typically ambiguous in biological terms. An important future challenge is to develop methods that will allow us to determine precisely what has changed.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
Candidate neuronal mechanisms for gray matter changes include axon sprouting, dendritic branching, synaptogenesis, and hippocampal neurogenesis.
“Most promising neuronal mechanisms underlying gray matter changes include axon sprouting, dendritic branching and synaptogenesis, or neurogenesis (in the hippocampus), while angiogenesis or astrocytic changes are discussed as non-neuronal factors (Fields, 2013;Johansen-Berg, 2012).”
From Serotonin and neuroplasticity – Links between molecular, functional and structural pathophysiology in depression (2017) · cites this paper as Johansen-Berg, 2012
The section “Structural brain change: another route to detecting functionally relevant brain plasticity?” (page unavailable) identifies hippocampal neurogenesis and synaptogenesis, and also discusses angiogenesis and glial changes. It mentions cortico-cortical rewiring and spine formation, but does not specifically identify axon sprouting or dendritic branching as mechanisms. (LLM, conf=0.86)
Experimental — accuracy not yet measuredCandidate non-neuronal mechanisms for gray matter changes include angiogenesis and astrocytic changes.
“Most promising neuronal mechanisms underlying gray matter changes include axon sprouting, dendritic branching and synaptogenesis, or neurogenesis (in the hippocampus), while angiogenesis or astrocytic changes are discussed as non-neuronal factors (Fields, 2013;Johansen-Berg, 2012).”
From Serotonin and neuroplasticity – Links between molecular, functional and structural pathophysiology in depression (2017) · cites this paper as Johansen-Berg, 2012
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Cites
Tract-based spatial statistics: Voxelwise analysis of multi-subject diffusion data
Smith, S. M., Jenkinson, M., Johansen-Berg, H., Rueckert, D., Nichols, T. E., Mackay, C., Watkins, K., Ciccarelli, O., Cader, M., Matthews, P., et al. (2006) · NeuroImage · doi:10.1016/j.neuroimage.2006.02.024 · Cited by 6,035 · see citing works
Self-citationMeasuring the thickness of the human cerebral cortex from magnetic resonance images
Fischl, B. R., & Dale, A. M. (2000) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.200033797 · Cited by 5,789 · see citing works
Navigation-related structural change in the hippocampi of taxi drivers
Maguire, E. A., Gadian, D. G., Johnsrude, I. S., Good, C. D., Ashburner, J., Frackowiak, R. S. J., & Frith, C. D. (2000) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.070039597 · Cited by 3,225 · see citing works
Bayesian analysis of neuroimaging data in FSL
Woolrich, M., Jbabdi, S., Patenaude, B., Chappell, M., Makni, S., Behrens, T. E. J., Beckmann, C., Jenkinson, M., & Smith, S. M. (2009) · NeuroImage · doi:10.1016/j.neuroimage.2008.10.055 · Cited by 2,774 · see citing works
Changes in grey matter induced by training
Draganski, B., Gaser, C., Busch, V., Schuierer, G., Bogdahn, U., & May, A. (2004) · Nature · doi:10.1038/427311a · Cited by 2,373 · see citing works
Learning enhances adult neurogenesis in the hippocampal formation
Gould, E., Beylin, A., Tanapat, P., Reeves, A., & Shors, T. J. (1999) · Nature Neuroscience · doi:10.1038/6365 · Cited by 2,157 · see citing works
Mindfulness practice leads to increases in regional brain gray matter density
Hölzel, B. K., Carmody, J., Vangel, M., Congleton, C., Yerramsetti, S. M., Gard, T., & Lazar, S. W. (2011) · Psychiatry Research: Neuroimaging · doi:10.1016/j.pscychresns.2010.08.006 · Cited by 1,914 · see citing works
Plasticity in gray and white: neuroimaging changes in brain structure during learning
Zatorre, R. J., Fields, R. D., & Johansen-Berg, H. (2012) · Nature Neuroscience · doi:10.1038/nn.3045 · Cited by 1,685 · see citing works
Self-citationSusceptibility weighted imaging (SWI)
Haacke, E. M., Xu, Y., Cheng, Y. N., & Reichenbach, J. R. (2004) · Magnetic Resonance in Medicine · doi:10.1002/mrm.20198 · Cited by 1,582 · see citing works
Training induces changes in white-matter architecture
Scholz, J., Klein, M. C., Behrens, T. E. J., & Johansen-Berg, H. (2009) · Nature Neuroscience · doi:10.1038/nn.2412 · Cited by 1,508 · see citing works
Self-citationHan, X., Jovicich, J., Salat, D., van der Kouwe, A., Quinn, B., Czanner, S., Busa, E., Pacheco, J., Albert, M., Killiany, R., et al. (2006) · NeuroImage · doi:10.1016/j.neuroimage.2006.02.051 · Cited by 1,508 · see citing works
Gottlieb, R. (1987) · The New Yorker · Cited by 1,309 · see citing works
Motor learning: its relevance to stroke recovery and neurorehabilitation
Krakauer, J. W. (2006) · Current Opinion in Neurology · doi:10.1097/01.wco.0000200544.29915.cc · Cited by 1,282 · see citing works
Rapid formation and selective stabilization of synapses for enduring motor memories
Xu, T., Yu, X., Perlik, A. J., Tobin, W. F., Zweig, J. A., Tennant, K., Jones, T., & Zuo, Y. (2009) · Nature · doi:10.1038/nature08389 · Cited by 1,193 · see citing works
Extensive piano practicing has regionally specific effects on white matter development
Bengtsson, S. L., Nagy, Z., Skare, S., Forsman, L., Forssberg, H., & Ullén, F. (2005) · Nature Neuroscience · doi:10.1038/nn1516 · Cited by 1,193 · see citing works
Neural correlates of motor recovery after stroke: a longitudinal fMRI study
Ward, N. (2003) · Brain · doi:10.1093/brain/awg245 · Cited by 1,003 · see citing works
Axcaliber: A method for measuring axon diameter distribution from diffusion MRI
Assaf, Y., Blumenfeld‐Katzir, T., Yovel, Y., & Basser, P. J. (2008) · Magnetic Resonance in Medicine · doi:10.1002/mrm.21577 · Cited by 849 · see citing works
Temporal and spatial dynamics of brain structure changes during extensive learning
Draganski, B., Gaser, C., Kempermann, G., Kuhn, H. G., Winkler, J., Buchel, C., & May, A. (2006) · Journal of Neuroscience · doi:10.1523/jneurosci.4628-05.2006 · Cited by 765 · see citing works
Diffusion MRI : from quantitative measurement to in vivo neuroanatomy
Johansen‐Berg, H., & Behrens, T. E. J. (2014) · doi:10.1016/b978-0-12-374709-9.x0001-6 · Cited by 703 · see citing works
Self-citationOrientationally invariant indices of axon diameter and density from diffusion MRI
Alexander, D. C., Hubbard, P. L., Hall, M. G., Moore, E. A., Ptito, M., Parker, G. J. M., & Dyrby, T. B. (2010) · NeuroImage · doi:10.1016/j.neuroimage.2010.05.043 · Cited by 683 · see citing works
Training-Induced Brain Structure Changes in the Elderly
Boyke, J., Driemeyer, J., Gaser, C., Büchel, C., & May, A. (2008) · The Journal of Neuroscience · doi:10.1523/jneurosci.0742-08.2008 · Cited by 681 · see citing works
Adkins, D. L., Boychuk, J. A., Remple, M. S., & Kleim, J. A. (2006) · Journal of Applied Physiology · doi:10.1152/japplphysiol.00515.2006 · Cited by 594 · see citing works
The effect of filter size on VBM analyses of DT-MRI data
Jones, D. K., Symms, M. R., Cercignani, M., & Howard, R. J. (2005) · NeuroImage · doi:10.1016/j.neuroimage.2005.02.013 · Cited by 562 · see citing works
Correlation between motor improvements and altered fMRI activity after rehabilitative therapy
Johansen‐Berg, H., Dawes, H., Guy, C., Smith, S. M., Wade, D. T., & Matthews, P. M. (2002) · Brain · doi:10.1093/brain/awf282 · Cited by 558 · see citing works
Self-citationSynaptogenesis and FOS Expression in the Motor Cortex of the Adult Rat after Motor Skill Learning
Kleim, J. A., Lussnig, E., Schwarz, E. R., Comery, T. A., & Greenough, W. T. (1996) · Journal of Neuroscience · doi:10.1523/jneurosci.16-14-04529.1996 · Cited by 539 · see citing works
Training of Working Memory Impacts Structural Connectivity
Takeuchi, H., Sekiguchi, A., Taki, Y., Yokoyama, S., Yomogida, Y., Komuro, N., Yamanouchi, T., Suzuki, S., & Kawashima, R. (2010) · The Journal of Neuroscience · doi:10.1523/jneurosci.4611-09.2010 · Cited by 531 · see citing works
Longitudinal Study of Motor Recovery After Stroke
Feydy, A., Carlier, R., Roby-Brami, A., Bussel, B., Cazalis, F., Pierot, L., Burnod, Y., & Maier, M. A. (2002) · Stroke · doi:10.1161/01.str.0000017100.68294.52 · Cited by 528 · see citing works
Taubert, M., Draganski, B., Anwander, A., Müller, K., Horstmann, A., Villringer, A., & Ragert, P. (2010) · The Journal of Neuroscience · doi:10.1523/jneurosci.2567-10.2010 · Cited by 514 · see citing works
Neurogenesis in adult primate neocortex: an evaluation of the evidence
RAKIC, P. T. (2002) · Nature reviews. Neuroscience · doi:10.1038/nrn700 · Cited by 491 · see citing works
Experience-dependent changes in cerebellar contributions to motor sequence learning
Doyon, J., Song, A. W., Karni, A., Lalonde, F. M., Adams, M. M., & Ungerleider, L. G. (2002) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.022615199 · Cited by 478 · see citing works
Changes in Gray Matter Induced by Learning—Revisited
Driemeyer, J., Boyke, J., Christian Gaser, B., Büchel, C., & May, A. (2008) · PLoS ONE · doi:10.1371/journal.pone.0002669 · Cited by 440 · see citing works
Distinguishable brain activation networks for short- and long-term motor skill learning
Floyer-Lea, A., & Matthews, P. M. (2005) · Journal of Neurophysiology · doi:10.1152/jn.00717.2004 · Cited by 422 · see citing works
Regional DTI differences in multiple sclerosis patients
Roosendaal, S. D., Geurts, J. J. G., Vrenken, H., Hulst, H. E., Cover, K. S., Castelijns, J. A., Pouwels, P. J. W., & Barkhof, F. (2008) · NeuroImage · doi:10.1016/j.neuroimage.2008.10.026 · Cited by 370 · see citing works
Variability in fMRI: An Examination of Intersession Differences
McGonigle, D. J., Howseman, A., Athwal, B. S., Friston, K. J., Frackowiak, R. S. J., & Holmes, A. P. (2000) · NeuroImage · doi:10.1006/nimg.2000.0562 · Cited by 351 · see citing works
Altering Cortical Connectivity: Remediation-Induced Changes in the White Matter of Poor Readers
Keller, T. A., & Just, M. A. (2009) · Neuron · doi:10.1016/j.neuron.2009.10.018 · Cited by 351 · see citing works
Changing Brain Networks for Visuomotor Control With Increased Movement Automaticity
Floyer-Lea, A., & Matthews, P. M. (2004) · Journal of Neurophysiology · doi:10.1152/jn.01092.2003 · Cited by 349 · see citing works
Magnetic Resonance Imaging of Myelin
Laule, C., Vavasour, I. M., Kolind, S. H., Li, D. K. B., Traboulsee, T. L., Moore, G. R. W., & MacKay, A. L. (2007) · Neurotherapeutics · doi:10.1016/j.nurt.2007.05.004 · Cited by 334 · see citing works
Arterial spin labeling perfusion fMRI with very low task frequency
Wang, J., Aguirre, G. K., Kimberg, D. Y., Roc, A. C., Li, L., & Detre, J. A. (2003) · Magnetic Resonance in Medicine · doi:10.1002/mrm.10437 · Cited by 316 · see citing works
Maze training in mice induces MRI-detectable brain shape changes specific to the type of learning
Lerch, J. P., Yiu, A. P., Martinez-Canabal, A., Pekar, T., Bohbot, V. D., Frankland, P. W., Henkelman, R. M., Josselyn, S. A., & Sled, J. G. (2011) · NeuroImage · doi:10.1016/j.neuroimage.2010.09.086 · Cited by 300 · see citing works
Diffusion MRI of Structural Brain Plasticity Induced by a Learning and Memory Task
Blumenfeld‐Katzir, T., Pasternak, O., Dagan, M., & Assaf, Y. (2011) · PLoS ONE · doi:10.1371/journal.pone.0020678 · Cited by 285 · see citing works
Quantitative magnetic resonance of postmortem multiple sclerosis brain before and after fixation
Schmierer, K., Wheeler‐Kingshott, C. A. M., Tozer, D. J., Boulby, P. A., Parkes, H. G., Yousry, T. A., Scaravilli, F., Barker, G. J., Tofts, P. S., & Miller, D. H. (2008) · Magnetic Resonance in Medicine · doi:10.1002/mrm.21487 · Cited by 281 · see citing works
Puttemans, V., Wenderoth, N., & Swinnen, S. P. (2005) · The Journal of Neuroscience · doi:10.1523/jneurosci.3866-04.2005 · Cited by 280 · see citing works
Heiervang, E., Behrens, T. E. J., Mackay, C. E., Robson, M. D., & Johansen-Berg, H. (2006) · NeuroImage · doi:10.1016/j.neuroimage.2006.07.037 · Cited by 259 · see citing works
Self-citationAxon diameter mapping in the presence of orientation dispersion with diffusion MRI
Zhang, H. G., Cristinacce, P. L. H., Parker, G. J. M., & Alexander, D. C. (2011) · NeuroImage · doi:10.1016/j.neuroimage.2011.01.084 · Cited by 258 · see citing works
Engvig, A., Fjell, A. M., Westlye, L. T., Moberget, T., Sundseth, Ø., Larsen, V. A., & Walhovd, K. B. (2012) · Human Brain Mapping · doi:10.1002/hbm.21370 · Cited by 250 · see citing works
Apparent diffusion tensor measurements in myelin-deficient rat spinal cords
Gulani, V., WEBB, A. G., Duncan, I. D., & Lauterbur, P. C. (2001) · Magnetic Resonance in Medicine · doi:10.1002/1522-2594(200102)45:2 · Cited by 249 · see citing works
The Biological Basis of Diffusion Anisotropy
Beaulieu, C. (2009) · Elsevier eBooks · doi:10.1016/b978-0-12-374709-9.00006-7 · Cited by 231 · see citing works
Steele, C. J., & Penhune, V. B. (2010) · Journal of Neuroscience · doi:10.1523/jneurosci.5569-09.2010 · Cited by 229 · see citing works
Ilg, R., Wohlschläger, A. M., Christian Gaser, B., Liebau, Y., Dauner, R., Wöller, A. A., Zimmer, C., Zihl, J., & Mühlau, M. (2008) · Journal of Neuroscience · doi:10.1523/jneurosci.5722-07.2008 · Cited by 214 · see citing works
Does cerebrovascular disease affect the coupling between neuronal activity and local haemodynamics?
Rossini, P. M. (2003) · Brain · doi:10.1093/brain/awh012 · Cited by 202 · see citing works
Regional Impairment of Cerebrovascular Reactivity and BOLD Signal in Adults After Stroke
Krainik, A., Hund‐Georgiadis, M., Zysset, S., et al. (2005) · Stroke · doi:10.1161/01.str.0000166178.40973.a7 · Cited by 190 · see citing works
Hihara, S., Notoya, T., Tanaka, M., Ichinose, S., Ojima, H., Obayashi, S., Fujii, N., & Iriki, A. (2006) · Neuropsychologia · doi:10.1016/j.neuropsychologia.2005.11.020 · Cited by 189 · see citing works
Whitall, J., Waller, S. M., Sorkin, J. D., Forrester, L. W., Macko, R. F., Hanley, D. F., Goldberg, A. P., & Luft, A. R. (2010) · Neurorehabilitation and neural repair · doi:10.1177/1545968310380685 · Cited by 184 · see citing works
Brain Activity Changes Associated With Treadmill Training After Stroke
Enzinger, C., Dawes, H., Johansen‐Berg, H., Wade, D. T., Bogdanovic, M. D., Collett, J., Guy, C., Kischka, U., Ropele, S., Fazekas, F., et al. (2009) · Stroke · doi:10.1161/strokeaha.109.550053 · Cited by 154 · see citing works
Self-citationNeural substrates of visuomotor learning based on improved feedback control and prediction
Grafton, S. T., Schmitt, P. J., Horn, J. D. V., & Diedrichsen, J. (2007) · NeuroImage · doi:10.1016/j.neuroimage.2007.09.062 · Cited by 148 · see citing works
Buma, F. E., Lindeman, E., Ramsey, N. F., & Kwakkel, G. (2010) · Neurorehabilitation and neural repair · doi:10.1177/1545968310364058 · Cited by 145 · see citing works
Increased astrocyte proliferation in rats after running exercise
Li, J., Ding, Y.-H., Rafols, J. A., Lai, Q., McAllister, J. P., & Ding, Y. (2005) · Neuroscience Letters · doi:10.1016/j.neulet.2005.06.009 · Cited by 143 · see citing works
Zandbelt, B. B., Gladwin, T. E., Raemaekers, M. A. H., van Buuren, M., Neggers, S. F. W., Kahn, R. S., Ramsey, N. F., & Vink, M. (2008) · NeuroImage · doi:10.1016/j.neuroimage.2008.04.183 · Cited by 106 · see citing works
Computational neuroanatomy: new perspectives for neuroradiology.
Good, C. D., Ashburner, J., & Frackowiak, R. S. J. (2001) · PubMed · Cited by 104 · see citing works
Motor learning induces astrocytic hypertrophy in the cerebellar cortex.
Kleim, J., Markham, J. A., Vij, K., Freese, J., Ballard, D. H., & Greenough, W. (2007) · Behavioural Brain Research · doi:10.1016/j.bbr.2006.12.022 · Cited by 99 · see citing works
Thomas, A. G., Marrett, S., Saad, Z. S., Ruff, D. A., Martin, A. D., & Bandettini, P. A. (2009) · NeuroImage · doi:10.1016/j.neuroimage.2009.05.097 · Cited by 90 · see citing works
Brovelli, A., Laksiri, N., Nazarian, B., Meunier, M., & Boussaoud, D. (2007) · Cerebral Cortex · doi:10.1093/cercor/bhm198 · Cited by 74 · see citing works
Bosnell, R., Kincses, Z. T., Stagg, C. J., Tomassini, V., Kischka, U., Jbabdi, S., Woolrich, M. W., Andersson, J., Matthews, P. M., & Johansen‐Berg, H. (2011) · Neurorehabilitation and neural repair · doi:10.1177/1545968311405675 · Cited by 57 · see citing works
Self-citationDistinct patterns of functional and structural neuroplasticity associated with learning Morse code
Schmidt‐Wilcke, T., Rosengarth, K., Luerding, R., Bogdahn, U., & Greenlee, M. W. (2010) · NeuroImage · doi:10.1016/j.neuroimage.2010.03.042 · Cited by 55 · see citing works
Marshall, I., Simonotto, E., Deary, I. J., MacLullich, A. M. J., Ebmeier, K. P., Rose, E. J., Wardlaw, J. M., Goddard, N., & Chappell, F. M. (2004) · Radiology · doi:10.1148/radiol.2333031782 · Cited by 49 · see citing works
Lövdén, M., Schaefer, S., Noack, H., Kanowski, M., Kaufmann, J., Tempelmann, C., Bodammer, N., Kühn, S., Heinze, H., Lindenberger, U., et al. (2010) · Cerebral Cortex · doi:10.1093/cercor/bhq230 · Cited by 36 · see citing works
Reliability of fMRI during a Continuous Motor Task: Assessment of Analysis Techniques
Kimberley, T. J., Birkholz, D. D., Hancock, R. A., VonBank, S. M., & Werth, T. N. (2007) · Journal of Neuroimaging · doi:10.1111/j.1552-6569.2007.00163.x · Cited by 30 · see citing works
Longitudinal MRI evaluations of human global cortical thickness over minutes to weeks
Wang, X., Bauer, W. R., Chiaia, N. L., Dennis, M., Gerken, M., Hummel, J., Kane, J., Kenmuir, C. L., Khuder, S., Lane, R., et al. (2008) · Neuroscience Letters · doi:10.1016/j.neulet.2008.06.013 · Cited by 16 · see citing works
Goodyear, B. G., & Douglas, E. A. (2008) · Experimental Brain Research · doi:10.1007/s00221-008-1574-7 · Cited by 15 · see citing works
Optimal time‐points in clinical trials with linearly divergent treatment effects
Winkens, B., Schouten, H. J. A., van Breukelen, G., & Berger, M. P. F. (2005) · Statistics in Medicine · doi:10.1002/sim.2385 · Cited by 14 · see citing works
Flagged first, then by citations
Cited by
Sorted by citations
Kraus, C., Castrén, E., Kasper, S., & Lanzenberger, R. (2017) · Neuroscience & Biobehavioral Reviews · doi:10.1016/j.neubiorev.2017.03.007 · Cited by 457 · see citing works
Structural basis of empathy and the domain general region in the anterior insular cortex
Mutschler, I., Reinbold, C., Wankerl, J., Seifritz, E., & Ball, T. (2013) · Frontiers in Human Neuroscience · doi:10.3389/fnhum.2013.00177 · Cited by 92 · see citing works
- Authors
- Johansen-Berg, H.
- Venue
- NeuroImage
- Publisher
- Elsevier BV
- Published
- 2012-08
- Volume
- 62
- Issue
- 2
- Pages
- 1293-1298
- ISSN
- 1053-8119 (ISSN-L)
- PMC
- PMC3677804
- OpenAlex
- W2030802430
- Cited by
- 45
- References
- 70
- Citations by year
- 2025: 2 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 2 · 2017: 3 · 2016: 3 · 2015: 6 · 2014: 4 · 2013: 8 · 2012: 4
- FWCI
- 0.83
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- NeuroImage (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Europe PMC (PubMed Central) (acceptedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Wellcome Trust (090955)
- Topics
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
- Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
- Keywords
- structural change, neuroplasticity, functional MRI, structural MRI, gray matter, white matter, learning, recovery, longitudinal neuroimaging
- MeSH terms
- Animals, Brain, Brain Mapping, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Neuronal Plasticity
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review