title: Bi-factor analyses of the Brief Test of Adult Cognition by Telephone.
abstract: BACKGROUND
  Telephone cognitive batteries are useful for large-scale screening and epidemiological studies, but their brevity and lack of content depth may cause psychometric limitations that hinder their utility.
  
  
  OBJECTIVE
  The current study addressed some of these limitations by rescaling the Brief Test of Adult Cognition by Telephone (BTACT; Tun & Lachman, 2006) using modern psychometric methods.
  
  
  METHODS
  Archival data were obtained from a national sample of 4,212 28 to 84-year-old volunteers in the National Survey of Midlife Development in the United States (Ryff et al., 2007) Cognitive Project (Ryff & Lachman, 2007). We fit a bi-factor model to a combination of item-level, subscale-level, and scale-level data.
  
  
  RESULTS
  The best fitting model contained a general factor and secondary factors capturing test-specific method effects or residual correlations for Number Series, Red/Green Test, and the Rey Auditory Verbal Learning Test. Factor scores generated from this model were compared with conventional BTACT scores. Important score differences (i.e., >0.3 standard deviation units) were found in 28% of the sample. The bi-factor scores demonstrated slightly superior validity than conventional BTACT scores when judged against a number of clinical and demographic criterion variables.
  
  
  CONCLUSIONS
  Modern psychometric approaches to scoring the BTACT have the benefit of linear scaling and a modest criterion validity advantage.
authors.affiliation: Department of Psychology, University of Colorado at Colorado Springs, Colorado Springs, CO, USA. bgavett@uccs.edu
authors.forename: Brandon E
authors.initials: BE
authors.lastname: Gavett
authors.forename: Paul K
authors.initials: PK
authors.lastname: Crane
authors.forename: Kristen
authors.initials: K
authors.lastname: Dams-O'Connor
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003071:Cognition / Q000502:physiology*; D056344:Executive Function / Q000502:physiology; D005260:Female; D006306:Health Surveys; D006801:Humans; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D015233:Models, Statistical; D009483:Neuropsychological Tests; D011594:Psychometrics / Q000379:methods*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013689:Telephone; D014481:United States; D014706:Verbal Learning
references.citation: Qual Life Res. 2006 Sep;15(7):1179-90
references.pmid: 17001438
references.citation: Arch Clin Neuropsychol. 2012 Mar;27(2):125-35
references.pmid: 22138320
references.citation: BMC Neurol. 2005 Apr 13;5(1):8
references.pmid: 15829005
references.citation: Am J Phys Med Rehabil. 2002 Jul;81(7):489-97
references.pmid: 12131174
references.citation: Neuroepidemiology. 2010;34(1):34-42
references.pmid: 19893327
references.citation: J Clin Epidemiol. 2011 Dec;64(12):1418-25
references.pmid: 21764556
references.citation: J Appl Psychol. 2003 Oct;88(5):879-903
references.pmid: 14516251
references.citation: Alzheimer Dis Assoc Disord. 2009 Jan-Mar;23(1):38-43
references.pmid: 18695589
references.citation: Med Care. 2007 May;45(5 Suppl 1):S22-31
references.pmid: 17443115
references.citation: Am J Occup Ther. 2003 May-Jun;57(3):298-306
references.pmid: 12785668
references.citation: Arch Neurol. 1993 Jun;50(6):599-603
references.pmid: 8503796
references.citation: Psychol Bull. 1990 Mar;107(2):238-46
references.pmid: 2320703
references.citation: Psychol Med. 1995 Nov;25(6):1211-9
references.pmid: 8637951
references.citation: Percept Mot Skills. 2001 Dec;93(3):761-76
references.pmid: 11806600
references.citation: Psychol Aging. 2010 Sep;25(3):606-19
references.pmid: 20677882
references.citation: Brain Inj. 1998 Oct;12(10):887-94
references.pmid: 9783086
references.citation: Brain Inj. 2006 Aug;20(9):947-57
references.pmid: 17062426
references.citation: J Clin Epidemiol. 2008 Oct;61(10):1018-27.e9
references.pmid: 18455909
references.citation: Stat Med. 2000 Jun 15-30;19(11-12):1631-44
references.pmid: 10844724
references.citation: Am J Alzheimers Dis Other Demen. 2006 Jan-Feb;21(1):45-53
references.pmid: 16526589
references.citation: Am J Phys Med Rehabil. 2007 May;86(5):356-63
references.pmid: 17449980
references.citation: J Gerontol. 1990 Sep;45(5):P200-4
references.pmid: 2394916
references.citation: Age Ageing. 2006 Nov;35(6):629-32
references.pmid: 16943264
references.citation: Annu Rev Public Health. 2007;28:113-26
references.pmid: 17094769
references.citation: Arch Phys Med Rehabil. 2008 Aug;89(8):1522-7
references.pmid: 18674987
references.citation: Dev Psychol. 2008 Sep;44(5):1421-9
references.pmid: 18793073
references.citation: BMC Public Health. 2004 Apr 27;4:12
references.pmid: 15113437
references.citation: Can J Aging. 2009 Sep;28(3):251-9
references.pmid: 19860980
references.citation: Clin Neuropsychol. 2002 Aug;16(3):407-12
references.pmid: 12607152
references.citation: Neuroepidemiology. 2005;25(1):19-25
references.pmid: 15855801
references.citation: Nat Rev Neurosci. 2004 Feb;5(2):87-96
references.pmid: 14735112
references.citation: Qual Life Res. 2007;16 Suppl 1:19-31
references.pmid: 17479357