title: Normative data for determining significance of test-retest differences on eight common neuropsychological instruments.
abstract: Clinicians and researchers who use neuropsychological tests to track functioning over time are in need of a method to correct for the effects of practice. Drawing from a large database of healthy, male subjects, we present data that can be used to calculate predicted retest scores for eight widely used neuropsychological instruments either via simple regression or reliable change index (RCI) methods. These methods are useful for individuals assessed across a wide time interval, 4-24 months. Limitations are discussed regarding the applicability of the data. Those with a need to factor out the effects of practice, test-retest reliability and other statistical confounds will find the information within this article useful.
authors.affiliation: Department of Psychiatry, UCLA School of Medicine, Los Angeles, CA 90024-1759, USA. ajlevine@mednet.ucla.edu
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Levine
authors.forename: Eric N
authors.initials: EN
authors.lastname: Miller
authors.forename: James T
authors.initials: JT
authors.lastname: Becker
authors.forename: Ola A
authors.initials: OA
authors.lastname: Selnes
authors.forename: Bruce A
authors.initials: BA
authors.lastname: Cohen
mesh_terms: D000328:Adult; D015331:Cohort Studies; D003627:Data Interpretation, Statistical; D003710:Demography; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008606:Mental Processes / Q000502:physiology*; D008875:Middle Aged; D015337:Multicenter Studies as Topic; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D011237:Predictive Value of Tests; D011594:Psychometrics; D012044:Regression Analysis; D015203:Reproducibility of Results; D013997:Time Factors; D014888:Wechsler Scales