An examination of reliable change methods for measuring cognitive change with the Cogstate Computerized Battery: Research and clinical implications
| Autor: | Dick Quan, Thomas M. Gates, Bruce J. Brew, Mark Bloch, Lucette A. Cysique, Jody Kamminga, Trina Vincent, Avindra Jayewardene |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Ordinal data Male 050103 clinical psychology Psychometrics Neuropsychological Tests Verbal learning Standard deviation 03 medical and health sciences 0302 clinical medicine Cognition Statistics Raw score Humans 0501 psychology and cognitive sciences Attention Reliability (statistics) Mathematics 05 social sciences Reproducibility of Results General Medicine Middle Aged Confidence interval Psychiatry and Mental health Clinical Psychology Neuropsychology and Physiological Psychology Cognition Disorders 030217 neurology & neurosurgery |
| Zdroj: | Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists. 36(4) |
| ISSN: | 1873-5843 |
| Popis: | Objective To compare the performance of four reliable change (RC) methods with respect to measuring cognitive change on the Cogstate Computerized Battery (CCB). Method We assessed cognitive change in 57 healthy, urban, well-educated males on the CCB at baseline and 6 months (Median age = 50, 65% university-educated). The study CCB version comprised seven measures covering attention, processing speed, verbal learning, and memory. Raw scores were z-score transformed using age-corrected Cogstate norms (CN) or the sample mean and standard deviation (internal standardization [IS]), and then averaged to create composite z-scores. Composite scores were entered into four RC formulae. RC was defined based on a 90% two-tailed confidence interval. Change scores were compared as continuous (z-scores) and ordinal variables (RC outcomes). Results CCB composite score reliability (rXY = .78–.79) was replicated in an age- and sex-matched Cogstate database sample of similar size. There was good overall agreement between the four RC methods (Bland–Altman Mdiff = .00; 95% limits of agreement with the mean—CN: z = ± .90; IS: z = ± .93), with each model adhering closely to the 10% rate of RC expected by chance alone (largest χ2 = .86, p = .99). Initial norming strategy (CN or IS) did not affect these outcomes. Conclusions Norming strategy and RC method choice did not significantly impact cognitive change predictions on CCB composite scores. A series of example case data are provided to practically demonstrate the steps involved in applying the longitudinal norms generated in this study. Research in more diverse normative samples is warranted. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|