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Volumn 64, Issue 1, 2013, Pages 209-215

Does variability in cognitive performance correlate with frontal brain volume?

Author keywords

Aging; Gray matter volume; Individual differences; White matter volume; Within person variability

Indexed keywords

ACCURACY; ADULT; AGED; ARTICLE; BRAIN SIZE; COGNITION; CONTROLLED STUDY; EPISODIC MEMORY; FEMALE; FRONTAL CORTEX; HUMAN; HUMAN EXPERIMENT; MALE; MEASUREMENT; MENTAL PERFORMANCE; NORMAL HUMAN; NUCLEAR MAGNETIC RESONANCE IMAGING; PREFRONTAL CORTEX; PRIORITY JOURNAL; RESPONSE TIME; WHITE MATTER; WORKING MEMORY;

EID: 84867391549     PISSN: 10538119     EISSN: 10959572     Source Type: Journal    
DOI: 10.1016/j.neuroimage.2012.09.039     Document Type: Article
Times cited : (54)

References (61)
  • 1
    • 27644442480 scopus 로고    scopus 로고
    • Intraindividual variability may not always indicate vulnerability in elders' cognitive performance
    • Allaire J.C., Marsiske M. Intraindividual variability may not always indicate vulnerability in elders' cognitive performance. Psychol. Aging 2005, 20:390-401.
    • (2005) Psychol. Aging , vol.20 , pp. 390-401
    • Allaire, J.C.1    Marsiske, M.2
  • 3
    • 33748677357 scopus 로고    scopus 로고
    • The correlative triad among aging, dopamine, and cognition: current status and future prospects
    • Bäckman L., Nyberg L., Lindenberger U., Li S.C., Farde L. The correlative triad among aging, dopamine, and cognition: current status and future prospects. Neurosci. Biobehav. Rev. 2006, 30:791-807.
    • (2006) Neurosci. Biobehav. Rev. , vol.30 , pp. 791-807
    • Bäckman, L.1    Nyberg, L.2    Lindenberger, U.3    Li, S.C.4    Farde, L.5
  • 4
    • 4344653886 scopus 로고    scopus 로고
    • The functional neuroanatomical correlates of response variability: evidence from a response inhibition task
    • Bellgrove M.A., Hester R., Garavan H. The functional neuroanatomical correlates of response variability: evidence from a response inhibition task. Neuropsychologia 2004, 42:1910-1916.
    • (2004) Neuropsychologia , vol.42 , pp. 1910-1916
    • Bellgrove, M.A.1    Hester, R.2    Garavan, H.3
  • 5
    • 84858449991 scopus 로고    scopus 로고
    • Age-related differences in memory and executive functions in healthy APOE ε4 carriers: the contribution of individual differences in prefrontal volumes and systolic blood pressure
    • Bender A.R., Raz N. Age-related differences in memory and executive functions in healthy APOE ε4 carriers: the contribution of individual differences in prefrontal volumes and systolic blood pressure. Neuropsychologia 2012, 50:704-714.
    • (2012) Neuropsychologia , vol.50 , pp. 704-714
    • Bender, A.R.1    Raz, N.2
  • 6
    • 75149159632 scopus 로고    scopus 로고
    • Issues in intraindividual variability, individual differences in equilibria and dynamics over multiple time scales
    • Boker S.M., Molenaar P.C., Nesselroade J.R. Issues in intraindividual variability, individual differences in equilibria and dynamics over multiple time scales. Psychol. Aging 2009, 24:858-862.
    • (2009) Psychol. Aging , vol.24 , pp. 858-862
    • Boker, S.M.1    Molenaar, P.C.2    Nesselroade, J.R.3
  • 7
    • 79953132790 scopus 로고    scopus 로고
    • Adult age differences in covariation of motivation and working memory performance, contrasting between-person and within-person findings
    • Brose A., Schmiedek F., Lovden M., Molenaar P.C.M., Lindenberger U. Adult age differences in covariation of motivation and working memory performance, contrasting between-person and within-person findings. Res. Hum. Dev. 2010, 7:61-78.
    • (2010) Res. Hum. Dev. , vol.7 , pp. 61-78
    • Brose, A.1    Schmiedek, F.2    Lovden, M.3    Molenaar, P.C.M.4    Lindenberger, U.5
  • 8
    • 43849105221 scopus 로고    scopus 로고
    • Age-related slowing of memory retrieval: contributions of perceptual speed and cerebral white matter integrity
    • Bucur B., Madden D.J., Spaniol J., Provenzale J.M., Cabeza R., White L.E., Huettel S.A. Age-related slowing of memory retrieval: contributions of perceptual speed and cerebral white matter integrity. Neurobiol. Aging 2008, 29:1070-1079.
    • (2008) Neurobiol. Aging , vol.29 , pp. 1070-1079
    • Bucur, B.1    Madden, D.J.2    Spaniol, J.3    Provenzale, J.M.4    Cabeza, R.5    White, L.E.6    Huettel, S.A.7
  • 9
    • 0027569681 scopus 로고
    • Blocks in choice responding as a function of age and physical fitness
    • Bunce D., Warr P.B., Cochrane T. Blocks in choice responding as a function of age and physical fitness. Psychol. Aging 1993, 8:26-33.
    • (1993) Psychol. Aging , vol.8 , pp. 26-33
    • Bunce, D.1    Warr, P.B.2    Cochrane, T.3
  • 10
    • 34247503352 scopus 로고    scopus 로고
    • White matter hyperintensities and within-person variability in community-dwelling adults aged 60-64 years
    • Bunce D., Anstey K.J., Christensen H., Dear K., Wen W., Sachdev P. White matter hyperintensities and within-person variability in community-dwelling adults aged 60-64 years. Neuropsychologia 2007, 45:2009-2015.
    • (2007) Neuropsychologia , vol.45 , pp. 2009-2015
    • Bunce, D.1    Anstey, K.J.2    Christensen, H.3    Dear, K.4    Wen, W.5    Sachdev, P.6
  • 12
    • 43249125150 scopus 로고    scopus 로고
    • Psychology Press, New York, F.I.M. Craik, T.A. Salthouse (Eds.)
    • The Handbook of Aging and Cognition 2008, 491-556. Psychology Press, New York. 3rd ed. F.I.M. Craik, T.A. Salthouse (Eds.).
    • (2008) The Handbook of Aging and Cognition , pp. 491-556
  • 13
    • 34247164623 scopus 로고    scopus 로고
    • Revisiting the dedifferentiation hypothesis with longitudinal multi-cohort data
    • de Frias C.M., Lövden M., Lindenberger U., Nilsson L.G. Revisiting the dedifferentiation hypothesis with longitudinal multi-cohort data. Intelligence 2007, 35:381-392.
    • (2007) Intelligence , vol.35 , pp. 381-392
    • de Frias, C.M.1    Lövden, M.2    Lindenberger, U.3    Nilsson, L.G.4
  • 15
    • 83055169166 scopus 로고    scopus 로고
    • Reduced white matter integrity is related to cognitive instability
    • Fjell A.M., Westlye L.T., Amlien I.K., Walhovd K.B. Reduced white matter integrity is related to cognitive instability. J. Neurosci. 2011, 31:18060-18072.
    • (2011) J. Neurosci. , vol.31 , pp. 18060-18072
    • Fjell, A.M.1    Westlye, L.T.2    Amlien, I.K.3    Walhovd, K.B.4
  • 16
    • 0016823810 scopus 로고
    • Mini-Mental State - Practical Method for Grading Cognitive State of Patients for Clinician
    • Folstein M.F., Folstein S.E., Mchugh P.R. Mini-Mental State - Practical Method for Grading Cognitive State of Patients for Clinician. J. Psychiatr. Res. 1975, 12:189-198.
    • (1975) J. Psychiatr. Res. , vol.12 , pp. 189-198
    • Folstein, M.F.1    Folstein, S.E.2    Mchugh, P.R.3
  • 17
    • 84859822816 scopus 로고    scopus 로고
    • Two thirds of the age-based changes in fluid and crystallized intelligence, perceptual speed, and memory in adulthood are shared
    • Ghisletta P., Rabbitt P.M.A., Lunn M., Lindenberger U. Two thirds of the age-based changes in fluid and crystallized intelligence, perceptual speed, and memory in adulthood are shared. Intelligence 2012, 40(3):260-268.
    • (2012) Intelligence , vol.40 , Issue.3 , pp. 260-268
    • Ghisletta, P.1    Rabbitt, P.M.A.2    Lunn, M.3    Lindenberger, U.4
  • 18
    • 0022023115 scopus 로고
    • An individual differences perspective: implications for cognitive research in gerontology
    • Hertzog C. An individual differences perspective: implications for cognitive research in gerontology. Res. Aging 1985, 7:7-45.
    • (1985) Res. Aging , vol.7 , pp. 7-45
    • Hertzog, C.1
  • 19
    • 0035200169 scopus 로고    scopus 로고
    • Understanding ageing - An evaluation of research designs for assessing the interdependence of ageing-related changes
    • Hofer S.M., Sliwinski M.J. Understanding ageing - An evaluation of research designs for assessing the interdependence of ageing-related changes. Gerontology 2001, 47:341-352.
    • (2001) Gerontology , vol.47 , pp. 341-352
    • Hofer, S.M.1    Sliwinski, M.J.2
  • 20
    • 80053977322 scopus 로고    scopus 로고
    • Intelligence and temporal accuracy of behaviour: unique and shared associations with reaction time and motor timing
    • Holm L., Ullen F., Madison G. Intelligence and temporal accuracy of behaviour: unique and shared associations with reaction time and motor timing. Exp. Brain Res. 2011, 214:175-183.
    • (2011) Exp. Brain Res. , vol.214 , pp. 175-183
    • Holm, L.1    Ullen, F.2    Madison, G.3
  • 21
    • 1542513665 scopus 로고    scopus 로고
    • Adult age and digit symbol substitution performance: a meta-analysis
    • Hoyer W.J., Stawski R.S., Wasylyshyn C., Verhaeghen P. Adult age and digit symbol substitution performance: a meta-analysis. Psychol. Aging 2004, 19:211-214.
    • (2004) Psychol. Aging , vol.19 , pp. 211-214
    • Hoyer, W.J.1    Stawski, R.S.2    Wasylyshyn, C.3    Verhaeghen, P.4
  • 22
    • 85145511089 scopus 로고    scopus 로고
    • Intraindividual variability, cognition and aging
    • Psychology Press, New York, F.I.M. Craik, T.A. Salthouse (Eds.)
    • Hultsch D.F., Strauss E., Hunter M., MacDonald S.W.S. Intraindividual variability, cognition and aging. The Handbook of Aging and Cognition 2008, 491-556. Psychology Press, New York. 3rd ed. F.I.M. Craik, T.A. Salthouse (Eds.).
    • (2008) The Handbook of Aging and Cognition , pp. 491-556
    • Hultsch, D.F.1    Strauss, E.2    Hunter, M.3    MacDonald, S.W.S.4
  • 23
    • 59849120110 scopus 로고    scopus 로고
    • Aging white matter and cognition: differential effects of regional variations in diffusion properties on memory, executive functions, and speed
    • Kennedy K.M., Raz N. Aging white matter and cognition: differential effects of regional variations in diffusion properties on memory, executive functions, and speed. Neuropsychologia 2009, 47:916-927.
    • (2009) Neuropsychologia , vol.47 , pp. 916-927
    • Kennedy, K.M.1    Raz, N.2
  • 24
    • 63349092611 scopus 로고    scopus 로고
    • Individual Differences in Episodic Memory: The Role of Self-Initiated Encoding Strategies
    • Kirchhoff B.A. Individual Differences in Episodic Memory: The Role of Self-Initiated Encoding Strategies. Neuroscientist 2009, 15:166-179.
    • (2009) Neuroscientist , vol.15 , pp. 166-179
    • Kirchhoff, B.A.1
  • 25
    • 0035501031 scopus 로고    scopus 로고
    • Aging cognition: from neuromodulation to representation
    • Li S.C., Lindenberger U., Sikstrom S. Aging cognition: from neuromodulation to representation. Trends Cogn. Sci. 2001, 5:479-486.
    • (2001) Trends Cogn. Sci. , vol.5 , pp. 479-486
    • Li, S.C.1    Lindenberger, U.2    Sikstrom, S.3
  • 26
    • 0345059927 scopus 로고    scopus 로고
    • Aging and attenuated processing robustness. Evidence from cognitive and sensorimotor functioning
    • Li S.C., Huxhold O., Schmiedek F. Aging and attenuated processing robustness. Evidence from cognitive and sensorimotor functioning. Gerontology 2004, 50:28-34.
    • (2004) Gerontology , vol.50 , pp. 28-34
    • Li, S.C.1    Huxhold, O.2    Schmiedek, F.3
  • 27
    • 33747884571 scopus 로고    scopus 로고
    • Variability in cognitive aging: from taxonomy to theory
    • Oxford University Press, Oxford, E. Bialystok, F.I.M. Craik (Eds.)
    • Lindenberger U., von Oertzen T. Variability in cognitive aging: from taxonomy to theory. Lifespan Cognition: Mechanisms of Change 2006, 297-314. Oxford University Press, Oxford. E. Bialystok, F.I.M. Craik (Eds.).
    • (2006) Lifespan Cognition: Mechanisms of Change , pp. 297-314
    • Lindenberger, U.1    von Oertzen, T.2
  • 28
    • 64649090286 scopus 로고    scopus 로고
    • Cognitive and sensory declines in old age: gauging the evidence for a common cause
    • Lindenberger U., Ghisletta P. Cognitive and sensory declines in old age: gauging the evidence for a common cause. Psychol. Aging 2009, 24:1-16.
    • (2009) Psychol. Aging , vol.24 , pp. 1-16
    • Lindenberger, U.1    Ghisletta, P.2
  • 30
    • 84879014795 scopus 로고    scopus 로고
    • In press. Heterogeneity in frontal-lobe aging (2nd ed.), in: Stuss, D.T., Knight, R.T. (Eds.)
    • Oxford University Press, New York.
    • Lindenberger, U., Burzynska, A.Z., Nagel, I.E., in press. Heterogeneity in frontal-lobe aging (2nd ed.), in: Stuss, D.T., Knight, R.T. (Eds.), Principles of frontal lobe functions. Oxford University Press, New York.
    • Principles of frontal lobe functions
    • Lindenberger, U.1    Burzynska, A.Z.2    Nagel, I.E.3
  • 31
    • 22544438471 scopus 로고    scopus 로고
    • Development of intellectual abilities in old age: from age gradients to individuals
    • Sage, Thousand Oaks, CA, O. Wilhelm, R.W. Engle (Eds.)
    • Lövdén M., Lindenberger U. Development of intellectual abilities in old age: from age gradients to individuals. Handbook of Understanding and Measuring Intelligence 2005, 203-221. Sage, Thousand Oaks, CA. O. Wilhelm, R.W. Engle (Eds.).
    • (2005) Handbook of Understanding and Measuring Intelligence , pp. 203-221
    • Lövdén, M.1    Lindenberger, U.2
  • 32
    • 33746323949 scopus 로고    scopus 로고
    • Intra-individual variability in behavior: links to brain structure, neurotransmission and neuronal activity
    • MacDonald S.W.S., Nyberg L., Backman L. Intra-individual variability in behavior: links to brain structure, neurotransmission and neuronal activity. Trends Neurosci. 2006, 29:474-480.
    • (2006) Trends Neurosci. , vol.29 , pp. 474-480
    • MacDonald, S.W.S.1    Nyberg, L.2    Backman, L.3
  • 33
    • 67349161828 scopus 로고    scopus 로고
    • Extrastriatal dopamine D2 receptor binding modulates intraindividual variability in episodic recognition and executive functioning
    • MacDonald S.W.S., Cervenka S., Farde L., Nyberg L., Backman L. Extrastriatal dopamine D2 receptor binding modulates intraindividual variability in episodic recognition and executive functioning. Neuropsychologia 2009, 47:2299-2304.
    • (2009) Neuropsychologia , vol.47 , pp. 2299-2304
    • MacDonald, S.W.S.1    Cervenka, S.2    Farde, L.3    Nyberg, L.4    Backman, L.5
  • 34
    • 75149173918 scopus 로고    scopus 로고
    • Neural underpinnings of within-person variability in cognitive functioning
    • MacDonald S.W.S., Li S.C., Backman L. Neural underpinnings of within-person variability in cognitive functioning. Psychol. Aging 2009, 24:792-808.
    • (2009) Psychol. Aging , vol.24 , pp. 792-808
    • MacDonald, S.W.S.1    Li, S.C.2    Backman, L.3
  • 35
    • 0034928713 scopus 로고    scopus 로고
    • An integrative theory of prefrontal cortex function
    • Miller E.K., Cohen J.D. An integrative theory of prefrontal cortex function. Annu. Rev. Neurosci. 2001, 24:167-202.
    • (2001) Annu. Rev. Neurosci. , vol.24 , pp. 167-202
    • Miller, E.K.1    Cohen, J.D.2
  • 38
    • 65349181826 scopus 로고    scopus 로고
    • A fragile balance: perturbation of GABA mediated circuit in prefrontal cortex generates high intraindividual performance variability
    • Pouget P., Wattiez N., Rivaud-Pechoux S., Gaymard B. A fragile balance: perturbation of GABA mediated circuit in prefrontal cortex generates high intraindividual performance variability. PLoS One 2009, 4:e5208.
    • (2009) PLoS One , vol.4
    • Pouget, P.1    Wattiez, N.2    Rivaud-Pechoux, S.3    Gaymard, B.4
  • 39
    • 77957944655 scopus 로고    scopus 로고
    • Variations of response time in a selective attention task are linked to variations of functional connectivity in the attentional network
    • Prado J., Carp J., Weissman D.H. Variations of response time in a selective attention task are linked to variations of functional connectivity in the attentional network. Neuroimage 2011, 54:541-549.
    • (2011) Neuroimage , vol.54 , pp. 541-549
    • Prado, J.1    Carp, J.2    Weissman, D.H.3
  • 40
    • 85047684901 scopus 로고    scopus 로고
    • There are stable individual differences in performance variability, both from moment to moment and from day to day
    • Rabbitt P., Osman P., Moore B., Stollery B. There are stable individual differences in performance variability, both from moment to moment and from day to day. Q. J. Exp. Psychol. A 2001, 54:981-1003.
    • (2001) Q. J. Exp. Psychol. A , vol.54 , pp. 981-1003
    • Rabbitt, P.1    Osman, P.2    Moore, B.3    Stollery, B.4
  • 41
    • 31044432336 scopus 로고    scopus 로고
    • Cognitive performance inconsistency: intraindividual change and variability
    • Ram N., Rabbitt P., Stollery B., Nesselroade J.R. Cognitive performance inconsistency: intraindividual change and variability. Psychol. Aging 2005, 20:623-633.
    • (2005) Psychol. Aging , vol.20 , pp. 623-633
    • Ram, N.1    Rabbitt, P.2    Stollery, B.3    Nesselroade, J.R.4
  • 42
    • 1042305449 scopus 로고    scopus 로고
    • Aging, sexual dimorphism, and hemispheric asymmetry of the cerebral cortex: replicability of regional differences in volume
    • Raz N., Gunning-Dixon F., Head D., Rodrigue K.M., Williamson A., Acker J.D. Aging, sexual dimorphism, and hemispheric asymmetry of the cerebral cortex: replicability of regional differences in volume. Neurobiol. Aging 2004, 25:377-396.
    • (2004) Neurobiol. Aging , vol.25 , pp. 377-396
    • Raz, N.1    Gunning-Dixon, F.2    Head, D.3    Rodrigue, K.M.4    Williamson, A.5    Acker, J.D.6
  • 45
    • 84865072680 scopus 로고    scopus 로고
    • Hundred days of cognitive training enhance broad cognitive abilities in adulthood: findings from the COGITO Study
    • Schmiedek F., Lövdén M., Lindenberger U. Hundred days of cognitive training enhance broad cognitive abilities in adulthood: findings from the COGITO Study. Front. Aging Neurosci. 2010, 2.
    • (2010) Front. Aging Neurosci. , vol.2
    • Schmiedek, F.1    Lövdén, M.2    Lindenberger, U.3
  • 47
    • 48249153186 scopus 로고
    • Intraclass correlations - uses in assessing rater reliability
    • Shrout P.E., Fleiss J.L. Intraclass correlations - uses in assessing rater reliability. Psychol. Bull. 1979, 86:420-428.
    • (1979) Psychol. Bull. , vol.86 , pp. 420-428
    • Shrout, P.E.1    Fleiss, J.L.2
  • 48
    • 84970670962 scopus 로고
    • Cognitive variability - a key to understanding cognitive development
    • Siegler R.S. Cognitive variability - a key to understanding cognitive development. Curr. Dir. Psychol. Sci. 1994, 3:1-5.
    • (1994) Curr. Dir. Psychol. Sci. , vol.3 , pp. 1-5
    • Siegler, R.S.1
  • 51
    • 0142153176 scopus 로고    scopus 로고
    • Staying on the job: the frontal lobes control individual performance variability
    • Stuss D.T., Murphy K.J., Binns M.A., Alexander M.P. Staying on the job: the frontal lobes control individual performance variability. Brain 2003, 126:2363-2380.
    • (2003) Brain , vol.126 , pp. 2363-2380
    • Stuss, D.T.1    Murphy, K.J.2    Binns, M.A.3    Alexander, M.P.4
  • 52
    • 84855999125 scopus 로고    scopus 로고
    • Becoming consistent: developmental reductions in intraindividual variability in reaction time are related to white matter integrity
    • Tamnes C.K., Fjell A.M., Westlye L.T., Ostby Y., Walhovd K.B. Becoming consistent: developmental reductions in intraindividual variability in reaction time are related to white matter integrity. J. Neurosci. 2012, 32:972-982.
    • (2012) J. Neurosci. , vol.32 , pp. 972-982
    • Tamnes, C.K.1    Fjell, A.M.2    Westlye, L.T.3    Ostby, Y.4    Walhovd, K.B.5
  • 53
    • 79952597236 scopus 로고    scopus 로고
    • Global and domain-specific changes in cognition throughout adulthood
    • Tucker-Drob E.M. Global and domain-specific changes in cognition throughout adulthood. Dev. Psychol. 2011, 47:331-343.
    • (2011) Dev. Psychol. , vol.47 , pp. 331-343
    • Tucker-Drob, E.M.1
  • 54
    • 42949157826 scopus 로고    scopus 로고
    • Intelligence and variability in a simple timing task share neural substrates in the prefrontal white matter
    • Ullén F., Forsman L., Blom O., Karabanov A., Madison G. Intelligence and variability in a simple timing task share neural substrates in the prefrontal white matter. J. Neurosci. 2008, 28:4238-4243.
    • (2008) J. Neurosci. , vol.28 , pp. 4238-4243
    • Ullén, F.1    Forsman, L.2    Blom, O.3    Karabanov, A.4    Madison, G.5
  • 55
    • 84858074969 scopus 로고    scopus 로고
    • Bottom-up mechanisms are involved in the relation between accuracy in timing tasks and intelligence - further evidence using manipulations of state motivation
    • Ullén F., Söderlund T., Kaaria L., Madison G. Bottom-up mechanisms are involved in the relation between accuracy in timing tasks and intelligence - further evidence using manipulations of state motivation. Intelligence 2012, 40:100-106.
    • (2012) Intelligence , vol.40 , pp. 100-106
    • Ullén, F.1    Söderlund, T.2    Kaaria, L.3    Madison, G.4
  • 56
    • 2942572946 scopus 로고    scopus 로고
    • Relationship between hippocampal volume and memory ability in healthy individuals across the lifespan: review and meta-analysis
    • Van Petten C. Relationship between hippocampal volume and memory ability in healthy individuals across the lifespan: review and meta-analysis. Neuropsychologia 2004, 42:1394-1413.
    • (2004) Neuropsychologia , vol.42 , pp. 1394-1413
    • Van Petten, C.1
  • 57
    • 34247575694 scopus 로고    scopus 로고
    • White matter volume predicts reaction time instability
    • Walhovd K.B., Fjell A.M. White matter volume predicts reaction time instability. Neuropsychologia 2007, 45:2277-2284.
    • (2007) Neuropsychologia , vol.45 , pp. 2277-2284
    • Walhovd, K.B.1    Fjell, A.M.2
  • 60
    • 0036343311 scopus 로고    scopus 로고
    • Lapses of intention and performance variability reveal age-related increases in fluctuations of executive control
    • West R., Murphy K.J., Armilio M.L., Craik F.I.M., Stuss D.T. Lapses of intention and performance variability reveal age-related increases in fluctuations of executive control. Brain Cogn. 2002, 49:402-419.
    • (2002) Brain Cogn. , vol.49 , pp. 402-419
    • West, R.1    Murphy, K.J.2    Armilio, M.L.3    Craik, F.I.M.4    Stuss, D.T.5


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