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Volumn 32, Issue 2, 2012, Pages 457-466

Intra-Individual reaction time variability in amnestic mild cognitive impairment: A precursor to dementia?

Author keywords

Aging; dementia; mild cognitive impairment; reaction time; visual attention

Indexed keywords

AGED; ARTICLE; CLINICAL ARTICLE; CONTROLLED STUDY; DEMENTIA; FEMALE; FOLLOW UP; HUMAN; INTRA INDIVIDUAL REACTION TIME VARIABILITY; MALE; MILD COGNITIVE IMPAIRMENT; PRIORITY JOURNAL; REACTION TIME;

EID: 84867542778     PISSN: 13872877     EISSN: 18758908     Source Type: Journal    
DOI: 10.3233/JAD-2012-120505     Document Type: Article
Times cited : (49)

References (74)
  • 1
    • 3242661679 scopus 로고    scopus 로고
    • Is MCI really just early dementia? A systematic review of conversion studies
    • Bruscoli M, Lovestone S (2004) Is MCI really just early dementia? A systematic review of conversion studies. Int Psychogeriatrics 16, 129-140.
    • (2004) Int Psychogeriatrics , vol.16 , pp. 129-140
    • Bruscoli, M.1    Lovestone, S.2
  • 3
    • 33644776510 scopus 로고    scopus 로고
    • Non-degenerative mild cognitive impairment in elderly people and use of anticholinergic drugs: Longitudinal cohort study
    • Ancelin ML, Artero S, Portet F, Dupuy A-M, Touchon J, Ritchie K (2006) Non-degenerative mild cognitive impairment in elderly people and use of anticholinergic drugs: Longitudinal cohort study. BMJ 332, 455-458.
    • (2006) BMJ , vol.332 , pp. 455-458
    • Ancelin, M.L.1    Artero, S.2    Portet, F.3    Dupuy, A.-M.4    Touchon, J.5    Ritchie, K.6
  • 5
    • 33748634913 scopus 로고    scopus 로고
    • Mild cognitive impairment: An opportunity to identify patients at high risk of progression to alzheimer's disease
    • Levey A, Lah J, Goldstein F, Steenland K, Bliwise D (2006) Mild cognitive impairment: An opportunity to identify patients at high risk of progression to Alzheimer's disease. Clin Therapeutics 28, 991-1001.
    • (2006) Clin Therapeutics , vol.28 , pp. 991-1001
    • Levey, A.1    Lah, J.2    Goldstein, F.3    Steenland, K.4    Bliwise, D.5
  • 6
    • 38949139850 scopus 로고    scopus 로고
    • Mild cognitive impairment: An overview
    • Petersen RC, Negash S (2008) Mild cognitive impairment: An overview. CNS Spectrum 13, 45-53.
    • (2008) CNS Spectrum , vol.13 , pp. 45-53
    • Petersen, R.C.1    Negash, S.2
  • 7
    • 79958226299 scopus 로고    scopus 로고
    • Mild cognitive impairment
    • Petersen RC (2011) Mild cognitive impairment. NEJM 364, 2227-2234.
    • (2011) NEJM , vol.364 , pp. 2227-2234
    • Petersen, R.C.1
  • 10
    • 0034113888 scopus 로고    scopus 로고
    • Education, activity, health, blood pressure and apolipoprotein e as predictors of cognitive change in old age: A review
    • Anstey KJ, Christensen H (2007) Education, activity, health, blood pressure and apolipoprotein E as predictors of cognitive change in old age: A review. Gerontology 46, 163-177.
    • (2007) Gerontology , vol.46 , pp. 163-177
    • Anstey, K.J.1    Christensen, H.2
  • 11
    • 46149123640 scopus 로고    scopus 로고
    • Early untreated Parkinson's disease patients show reaction time variability
    • Camicioli RM,Wieler M, de Frias CM, Martin WRW(2008) Early untreated Parkinson's disease patients show reaction time variability. Neurosci Lett 441, 77-80.
    • (2008) Neurosci Lett , vol.441 , pp. 77-80
    • Camicioli, R.M.1    Wieler, M.2    De Frias, C.M.3    Martin, W.R.W.4
  • 12
    • 77957254326 scopus 로고    scopus 로고
    • Intraindividual variability is related to cognitive change in older adults: Evidence for within-person coupling
    • Bielak AAM, Hultsch DF, Strauss E, MacDonald SWS, Hunter MA (2010) Intraindividual variability is related to cognitive change in older adults: Evidence for within-person coupling. Psychol Aging 25, 575-586.
    • (2010) Psychol Aging , vol.25 , pp. 575-586
    • Bielak, A.A.M.1    Hultsch, D.F.2    Strauss, E.3    MacDonald, S.W.S.4    Hunter, M.A.5
  • 14
    • 84856031691 scopus 로고    scopus 로고
    • White matter integrity and reaction time intraindividual variability in healthy aging and early-stage Alzheimer disease
    • Jackson JD, Balota DA, Duchek JM, Head D (2011) White matter integrity and reaction time intraindividual variability in healthy aging and early-stage Alzheimer disease. Neuropsychologia 50, 357-366.
    • (2011) Neuropsychologia , vol.50 , pp. 357-366
    • Jackson, J.D.1    Balota, D.A.2    Duchek, J.M.3    Head, D.4
  • 15
    • 83055169166 scopus 로고    scopus 로고
    • Reduced white matter integrity is related to cognitive instability
    • Fjell AM, Westlye LT, Amlien IK, Walhovd KB (2011) Reduced white matter integrity is related to cognitive instability. J Neurosci 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
  • 17
    • 84855999125 scopus 로고    scopus 로고
    • Becoming consistent: Developmental reductions in intraindividual variability in reaction time are related to white matter integrity
    • Tamnes CK, Fjell AM, Westlye LT, Ostby Y, Walhovd KB (2012) Becoming consistent: Developmental reductions in intraindividual variability in reaction time are related to white matter integrity. J Neurosci 18, 972-982.
    • (2012) J Neurosci , vol.18 , pp. 972-982
    • Tamnes, C.K.1    Fjell, A.M.2    Westlye, L.T.3    Ostby, Y.4    Walhovd, K.B.5
  • 19
    • 67349252735 scopus 로고    scopus 로고
    • Diffusion tensor changes in patients with amnestic mild cognitive impairment and various dementias
    • Chen TF, Lin CC, Chen YF, Liu HM, Hua MS, Huang YC, Chiu MJ (2009) Diffusion tensor changes in patients with amnestic mild cognitive impairment and various dementias. Psychiatry Res 173, 15-21.
    • (2009) Psychiatry Res , vol.173 , pp. 15-21
    • Chen, T.F.1    Lin, C.C.2    Chen, Y.F.3    Liu, H.M.4    Hua, M.S.5    Huang, Y.C.6    Chiu, M.J.7
  • 20
    • 1942507523 scopus 로고    scopus 로고
    • A comparison of sequential sampling models for two-choice reaction time
    • Ratcliff R, Smith PL (2004) A comparison of sequential sampling models for two-choice reaction time. Psychol Rev 111, 333-367.
    • (2004) Psychol Rev , vol.111 , pp. 333-367
    • Ratcliff, R.1    Smith, P.L.2
  • 21
    • 49749136512 scopus 로고    scopus 로고
    • Reaction times and performance variability in normal aging, mild cognitive impairment, and Alzheimer's disease
    • Gorus E, De Raedt R, Lambert M, Lemper J-C, Mets T (2008) Reaction times and performance variability in normal aging, mild cognitive impairment, and Alzheimer's disease. J Geriatr Psychiatry Neurol 21, 204-218.
    • (2008) J Geriatr Psychiatry Neurol , vol.21 , pp. 204-218
    • Gorus, E.1    De Raedt, R.2    Lambert, M.3    Lemper, J.-C.4    Mets, T.5
  • 23
    • 0033774599 scopus 로고    scopus 로고
    • Intraindividual variability in cognitive performance in older adults: Comparison of adults with mild dementia, adults with arthritis and healthy adults
    • Hultsch DF, MacDonald SWS, Hunter MA, Levy-Bencheton J, Strauss E (2000) Intraindividual variability in cognitive performance in older adults: Comparison of adults with mild dementia, adults with arthritis and healthy adults. Neuropsychology 14, 588-598.
    • (2000) Neuropsychology , vol.14 , pp. 588-598
    • Hultsch, D.F.1    MacDonald, S.W.S.2    Hunter, M.A.3    Levy-Bencheton, J.4    Strauss, E.5
  • 24
    • 32144440086 scopus 로고    scopus 로고
    • Intraindividual variability as a marker of neurological dysfunction: A comparison of Alzheimer's disease and Parkinson's disease
    • Burton CL, Strauss E, Hultsch DF, Moll A, Hunter MA (2006) Intraindividual variability as a marker of neurological dysfunction: A comparison of Alzheimer's disease and Parkinson's disease. J Clin Exp Neuropsychol 28, 67-83.
    • (2006) J Clin Exp Neuropsychol , vol.28 , pp. 67-83
    • Burton, C.L.1    Strauss, E.2    Hultsch, D.F.3    Moll, A.4    Hunter, M.A.5
  • 25
    • 19444375718 scopus 로고    scopus 로고
    • Within-occasion intraindividual variability and preclinical diagnostic status: Is intraindividual variability an indicator of mild cognitive impairment
    • Christiensen H, Dear KBG, Anstey KJ, Parslow RA, Sachdev P, Jorm AF (2005)Within-occasion intraindividual variability and preclinical diagnostic status: Is intraindividual variability an indicator of mild cognitive impairment? Neuropsychology 19, 309-317.
    • (2005) Neuropsychology , vol.19 , pp. 309-317
    • Christiensen, H.1    Dear, K.B.G.2    Anstey, K.J.3    Parslow, R.A.4    Sachdev, P.5    Jorm, A.F.6
  • 27
    • 77956961043 scopus 로고    scopus 로고
    • Shifting efficacy, distribution of attention and controlled processing in two subtypes of mild cognitive impairment: Response time performance and intraindividual variability on a visual search task
    • McLaighlin PM, Borrie MJ, Murtha SJE (2010) Shifting efficacy, distribution of attention and controlled processing in two subtypes of mild cognitive impairment: Response time performance and intraindividual variability on a visual search task. Neurocase 16, 408-417.
    • (2010) Neurocase , vol.16 , pp. 408-417
    • McLaighlin, P.M.1    Borrie, M.J.2    Murtha, S.J.E.3
  • 28
    • 69749122586 scopus 로고    scopus 로고
    • Visual attention-related processing in Alzheimer's disease
    • Tales A, Porter G (2008) Visual attention-related processing in Alzheimer's disease. Rev Clin Geront 18, 229-243.
    • (2008) Rev Clin Geront , vol.18 , pp. 229-243
    • Tales, A.1    Porter, G.2
  • 30
    • 46349085969 scopus 로고    scopus 로고
    • Dissociations in visual attention deficits among persons with mild cognitive impairment
    • OkonkwoO,WadleyVG, Ball K,Vance DE, CroweM(2008) Dissociations in visual attention deficits among persons with mild cognitive impairment. Aging Neuropsychol Cog 15, 492- 505.
    • (2008) Aging Neuropsychol Cog , vol.15 , pp. 492-505
    • Okonkwo, O.1    Wadley, V.G.2    Ball, K.3    Vance, D.E.4    Crowe, M.5
  • 31
    • 14944376674 scopus 로고    scopus 로고
    • Abnormal visual search in mild cognitive impairment and Alzheimer's disease
    • Tales A, Haworth J, Nelson S, Snowden RJ,WilcockG(2005) Abnormal visual search in mild cognitive impairment and Alzheimer's disease. Neurocase 11, 80-84.
    • (2005) Neurocase , vol.11 , pp. 80-84
    • Tales, A.1    Haworth, J.2    Nelson, S.3    Snowden, R.J.4    Wilcock, G.5
  • 33
    • 14944377038 scopus 로고    scopus 로고
    • Abnormal spatial and non-spatial cueing effects in mild cognitive impairment and Alzheimer's disease
    • Tales A, Snowden RJ, Haworth J, Wilcock G (2005) Abnormal spatial and non-spatial cueing effects in mild cognitive impairment and Alzheimer's disease. Neurocase 11, 85-92.
    • (2005) Neurocase , vol.11 , pp. 85-92
    • Tales, A.1    Snowden, R.J.2    Haworth, J.3    Wilcock, G.4
  • 34
    • 78650172197 scopus 로고    scopus 로고
    • Exogenous phasic alerting and spatial orienting in mild cognitive impairment compared to healthy ageing: Study outcome is related to target response
    • Tales A, Snowden RJ, Phillips M, Haworth J, Porter G, Wilcock G, Bayer A (2011) Exogenous phasic alerting and spatial orienting in mild cognitive impairment compared to healthy ageing: Study outcome is related to target response. Cortex 47, 180-190.
    • (2011) Cortex , vol.47 , pp. 180-190
    • Tales, A.1    Snowden, R.J.2    Phillips, M.3    Haworth, J.4    Porter, G.5    Wilcock, G.6    Bayer, A.7
  • 36
    • 78650807192 scopus 로고    scopus 로고
    • Greater default-mode network abnormalities compared to high order visual processing systems in amnestic mild cognitive impairment: An integrated multi-modal MRI study
    • Sala-Llonch R, Bosch B, Arenaza-Urquijo EM, Rami L, Bargall ́o N, Junqu'e C, Molinuevo JL, Bartr'es-Faz D (2010) Greater default-mode network abnormalities compared to high order visual processing systems in amnestic mild cognitive impairment: An integrated multi-modal MRI study. J Alzheimers Dis 22, 523-539.
    • (2010) J Alzheimers Dis , vol.22 , pp. 523-539
    • Sala-Llonch, R.1    Bosch, B.2    Arenaza-Urquijo, E.M.3    Rami, L.4    Bargall ́o, N.5    Junqu'E, C.6    Molinuevo, J.L.7    Bartr'Es-Faz, D.8
  • 39
    • 34948904401 scopus 로고    scopus 로고
    • Enhanced stimulus strength improves visual cognition in aging and Alzheimer's disease
    • Cronin-Golomb A, Gilmore GC, Neargarder S, Morrison SR, Laudate M (2007) Enhanced stimulus strength improves visual cognition in aging and Alzheimer's disease. Cortex 43, 952-966.
    • (2007) Cortex , vol.43 , pp. 952-966
    • Cronin-Golomb, A.1    Gilmore, G.C.2    Neargarder, S.3    Morrison, S.R.4    Laudate, M.5
  • 40
    • 77954986407 scopus 로고    scopus 로고
    • Visual impairment in Alzheimer's disease:Acritical review
    • Kirby E, BandelowS, Hogervorst E (2010)Visual impairment in Alzheimer's disease:Acritical review. J Alzheimers Dis 21, 15-34.
    • (2010) J Alzheimers Dis , vol.21 , pp. 15-34
    • Kirby, E.1    Bandelow, S.2    Hogervorst, E.3
  • 44
    • 0025318243 scopus 로고
    • The attention system of the human brain
    • Posner MI, Petersen SE (1990) The attention system of the human brain. Ann Rev Neurosci 13, 25-42.
    • (1990) Ann Rev Neurosci , vol.13 , pp. 25-42
    • Posner, M.I.1    Petersen, S.E.2
  • 45
    • 0034746694 scopus 로고    scopus 로고
    • The noradrenergic 2 agonist clonidine modulates behavioural and neuroanatomical correlates of human attentional orienting and alerting
    • Coull JT, Nobre AC, Frith CD (2001) The noradrenergic 2 agonist clonidine modulates behavioural and neuroanatomical correlates of human attentional orienting and alerting. Cereb Cortex 11, 73-84.
    • (2001) Cereb Cortex , vol.11 , pp. 73-84
    • Coull, J.T.1    Nobre, A.C.2    Frith, C.D.3
  • 46
    • 0034988524 scopus 로고    scopus 로고
    • On the functional neuroanatomy of intrinsic and phasic alertness
    • SturmW,Willmes K (2001) On the functional neuroanatomy of intrinsic and phasic alertness. Neuroimage 14, S76-S84.
    • (2001) Neuroimage , vol.14
    • Sturm, W.1    Willmes, K.2
  • 47
    • 27644495971 scopus 로고    scopus 로고
    • Modulations among the alerting, orienting and executive control networks
    • Callejas A, Lupianez J, Funes MJ, Tudela P (2005) Modulations among the alerting, orienting and executive control networks. Exp Brain Res 167, 27-37.
    • (2005) Exp Brain Res , vol.167 , pp. 27-37
    • Callejas, A.1    Lupianez, J.2    Funes, M.J.3    Tudela, P.4
  • 48
    • 64849087922 scopus 로고    scopus 로고
    • Testing the behavioural interaction and integration of attentional networks
    • Fan J, Gu X, Guise KG, Liu X, Fossella J, Wang H, Posner MI (2009) Testing the behavioural interaction and integration of attentional networks. Brain Cogn 70, 209-220.
    • (2009) Brain Cogn , vol.70 , pp. 209-220
    • Fan, J.1    Gu, X.2    Guise, K.G.3    Liu, X.4    Fossella, J.5    Wang, H.6    Posner, M.I.7
  • 49
    • 77957264703 scopus 로고    scopus 로고
    • Individual differences in distinct components of attention are linked to anatomical variations in distinct white matter tracts
    • Niogi S, Mukherjee P, Ghajar J, McCandliss, D (2010) Individual differences in distinct components of attention are linked to anatomical variations in distinct white matter tracts. Front Neuroanat 4, 1-12.
    • (2010) Front Neuroanat , vol.4 , pp. 1-12
    • Niogi, S.1    Mukherjee, P.2    Ghajar, J.3    McCandliss, D.4
  • 50
    • 75149123844 scopus 로고    scopus 로고
    • Alertness in young healthy subjects: An fMRI study of brain region interactivity enhanced by a warning signal
    • P'erin B, Godefroy O, Fall S, de Marco G (2010) Alertness in young healthy subjects: An fMRI study of brain region interactivity enhanced by a warning signal. Brain Cogn 72, 271-281.
    • (2010) Brain Cogn , vol.72 , pp. 271-281
    • P'Erin, B.1    Godefroy, O.2    Fall, S.3    De Marco, G.4
  • 51
    • 0018977912 scopus 로고
    • Orienting of attention
    • Posner MI (1980) Orienting of attention. Q J Exp Psychol 32, 3-15.
    • (1980) Q J Exp Psychol , vol.32 , pp. 3-15
    • Posner, M.I.1
  • 52
    • 0030902683 scopus 로고    scopus 로고
    • Relating the mechanism of orienting and alerting
    • Fernandez-Duque D, Posner MI (1997) Relating the mechanism of orienting and alerting. Neuropsychologia 35, 477-486.
    • (1997) Neuropsychologia , vol.35 , pp. 477-486
    • Fernandez-Duque, D.1    Posner, M.I.2
  • 53
    • 0016823810 scopus 로고
    • Mini-mental state: A practical method for grading the cognitive state of patients for the clinician
    • Folstein MF, Folstein SE, McHugh PR (1975) Mini-mental state: A practical method for grading the cognitive state of patients for the clinician. J Psychiatric Res 12, 189-198.
    • (1975) J Psychiatric Res , vol.12 , pp. 189-198
    • Folstein, M.F.1    Folstein, S.E.2    McHugh, P.R.3
  • 54
    • 0029926975 scopus 로고    scopus 로고
    • Assessment of activities of daily living in dementia: Development of the Bristol activities of daily living scale
    • Bucks RS, Ashworth DL, Wilcock GK, Siegfried K (1996) Assessment of activities of daily living in dementia: Development of the Bristol activities of daily living scale. Age Ageing 25, 113-120.
    • (1996) Age Ageing , vol.25 , pp. 113-120
    • Bucks, R.S.1    Ashworth, D.L.2    Wilcock, G.K.3    Siegfried, K.4
  • 55
    • 0034642158 scopus 로고    scopus 로고
    • A brief cognitive test battery to differentiate Alzheimer's disease and frontotemporal dementia
    • Mathuranath PS, Nestor PJ, Berrios GE, RakowiczW, Hodges JR (2000) A brief cognitive test battery to differentiate Alzheimer's disease and frontotemporal dementia. Neurology 55, 1613-1620.
    • (2000) Neurology , vol.55 , pp. 1613-1620
    • Mathuranath, P.S.1    Nestor, P.J.2    Berrios, G.E.3    Rakowicz, W.4    Hodges, J.R.5
  • 58
    • 0031971274 scopus 로고    scopus 로고
    • Hopkins verbal learning test-revised: Normative data and analysis of inter-form and test-re-test reliability
    • Benedict RHB, Schretlen D, Groninger L, Brandt J (1998) Hopkins verbal learning test-revised: Normative data and analysis of inter-form and test-re-test reliability. Clin Neuropsych 12, 43-55.
    • (1998) Clin Neuropsych , vol.12 , pp. 43-55
    • Benedict, R.H.B.1    Schretlen, D.2    Groninger, L.3    Brandt, J.4
  • 61
    • 0032452002 scopus 로고    scopus 로고
    • Parallel short forms for the boston naming test: Psychometric properties and norms for older adults
    • Fastenau PS, Denburg NL, Mauer BA (1998) Parallel short forms for the Boston Naming Test: Psychometric properties and norms for older adults. J Clin Exp NeuroPsych 20, 828- 834.
    • (1998) J Clin Exp NeuroPsych , vol.20 , pp. 828-834
    • Fastenau, P.S.1    Denburg, N.L.2    Mauer, B.A.3
  • 63
    • 0031716056 scopus 로고    scopus 로고
    • Validation of a new scoring system for the Weigl color form sorting test in memory disorders clinical sample
    • Byrne LTM, Bucks RS, Cuerden JM (1998) Validation of a new scoring system for the Weigl color form sorting test in memory disorders clinical sample. J Clin Exp Neuropsych 20, 286-292.
    • (1998) J Clin Exp Neuropsych , vol.20 , pp. 286-292
    • Byrne, L.T.M.1    Bucks, R.S.2    Cuerden, J.M.3
  • 67
    • 0000119553 scopus 로고
    • Validity of the Trail making test as an indicator of organic brain damage
    • Reitan RM (1958) Validity of the Trail making test as an indicator of organic brain damage. Percept Motor Skills 8, 271-276.
    • (1958) Percept Motor Skills , vol.8 , pp. 271-276
    • Reitan, R.M.1
  • 68
    • 0041905227 scopus 로고    scopus 로고
    • Mild cognitive impairment
    • Oxford University Press Oxford
    • Petersen RC (2003) Mild Cognitive Impairment. Aging to Alzheimer's Disease. Oxford University Press, Oxford, pp. 1-14.
    • (2003) Aging to Alzheimer's Disease , pp. 1-14
    • Petersen, R.C.1
  • 69
    • 0021271971 scopus 로고
    • Clinical diagnosis of Alzheimer's disease: Report of the NINCDS-ADRDAWork Group under the auspices of Department of Health and Human Services Task Force on Alzheimer's disease
    • McKhann G, Drachman D, Folstein M, Katzman R, Price D, Stadlan EM (1984) Clinical diagnosis of Alzheimer's disease: Report of the NINCDS-ADRDAWork Group under the auspices of Department of Health and Human Services Task Force on Alzheimer's disease. Neurology 34, 939-944.
    • (1984) Neurology , vol.34 , pp. 939-944
    • McKhann, G.1    Drachman, D.2    Folstein, M.3    Katzman, R.4    Price, D.5    Stadlan, E.M.6
  • 70
    • 0036720864 scopus 로고    scopus 로고
    • Prevalence of mild cognitive impairment: A population-based study in the elderly subjects
    • Ḧanninen T, Hallikainen M, Tuomainen S, Vanhanen M, Soininen H (2002) Prevalence of mild cognitive impairment: A population-based study in the elderly subjects. Acta Neurol Scand 106, 148-154.
    • (2002) Acta Neurol Scand , vol.106 , pp. 148-154
    • Hanninen, T.1    Hallikainen, M.2    Tuomainen, S.3    Vanhanen, M.4    Soininen, H.5
  • 74
    • 34547399552 scopus 로고    scopus 로고
    • Within-person trial-to-trial variability precedes and predicts cognitive decline in old and very old age: Longitudinal data from the Berlin Aging Study
    • L̈ovd'en M, Li S-C, Shing YL, Limdenberger U (2007) Within-person trial-to-trial variability precedes and predicts cognitive decline in old and very old age: Longitudinal data from the Berlin Aging Study. Neuropsychologia 45, 2827- 2838.
    • (2007) Neuropsychologia , vol.45 , pp. 2827-2838
    • Lovd'En, M.1    Li, S.-C.2    Shing, Y.L.3    Limdenberger, U.4


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