Best practices for repeated measures ANOVAs of ERP data: Reference, regional channels, and robust ANOVAs.
Analysis of variance (ANOVA) is a fundamental procedure for event-related potential (ERP) research and yet there is very little guidance for best practices. It is important for the field to develop evidence-based best practices: 1) to minimize the Type II error rate by maximizing statistical power, 2) to minimize the Type I error rate by reducing the latitude for varying procedures, and 3) to identify areas for further methodological improvements. While generic treatments of ANOVA methodology are available, ERP datasets have many unique characteristics that must be considered. In the present report, a novelty oddball dataset was utilized as a test case to determine whether three aspects of ANOVA procedures as applied to ERPs make a real-world difference: the effects of reference site, regional channels, and robust ANOVAs. Recommendations are provided for best practices in each of these areas.
Maryland Neuroimaging Center, University of Maryland, 8077 Greenmead, College Park, MD 20742, United States. Electronic address: jdien07@mac.com.
Joseph
J
Dien
D000704:Analysis of Variance; D003627:Data Interpretation, Statistical; D004569:Electroencephalography / Q000379:methods* / Q000706:statistics & numerical data; D005071:Evoked Potentials / Q000502:physiology*; D006801:Humans
ANOVA; ERP; Statistics