title: [Standardization of the Test Your Memory and evaluation of their concordance with the outcome of the psychometric examination].
abstract: OBJECTIVE
  To explore the relationship between scores on the Test Your Memory (TYM) battery and findings from a more exhaustive neurocognitive assessment.
  
  
  METHODS
  The TYM and fourteen psychometric tests were administered to 84 subjects aged 50 or older who attended an outpatient neurology clinic due to cognitive symptoms. Each patient's cognitive state was determined independently from his/her score on the TYM (CDR 0, n=25; CDR 0.5, n=45; CDR 1, n=14). We analysed concurrent validity of TYM scores and results from the psychometric tests, as well as the degree of concordance between the two types of measurement, by contrasting normalised data from each instrument.
  
  
  RESULTS
  Although the intraclass correlation coefficient was 0.67 (confidence interval 95%, 0.53-0.77), analysis of the Bland-Altman plot and the curve on the survival-agreement plot (Luiz et al. method) demonstrates that the individual distances between the two methods exhibit excessive dispersion from a clinical viewpoint. TYM-based predictions of the mean z-score on psychometric tests differed substantially from real results in 30% of the subjects. Concordance of 95% can only be achieved by accepting absolute inter-instrument differences of up to 0.87 as identical values. Furthermore, the TYM underestimates cognitive performance for low values and overestimates it for high values.
  
  
  CONCLUSIONS
  The TYM is a cognitive screening test which should not be used to predict results on psychometric tests or to detect cognitive changes in clinical trials.
authors.affiliation: Centro Médico Orense, Madrid, España. Electronic address: jferreroarias@gmail.com.
authors.forename: J
authors.initials: J
authors.lastname: Ferrero-Arias
authors.affiliation: Centro Médico Orense, Madrid, España.
authors.forename: M A
authors.initials: MA
authors.lastname: Turrión-Rojo
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003072:Cognition Disorders / Q000150:complications / Q000175:diagnosis / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D008568:Memory / Q000502:physiology*; D008569:Memory Disorders / Q000175:diagnosis / Q000523:psychology; D008875:Middle Aged; D009483:Neuropsychological Tests / Q000592:standards*; D011594:Psychometrics; D012016:Reference Values
keywords: Alzheimer disease; Cognitive screening test; Demencia; Dementia; Deterioro cognitivo ligero; Enfermedad de Alzheimer; Mild cognitive impairment; Prueba cognitiva de cribado; Psicometría; Psychometrics; Test Your Memory