rmcorrShiny: A web and standalone application for repeated measures correlation

We describe a web and standalone Shiny app for calculating the common,linear within-individual association for repeated assessments of paired measureswith multiple individuals: repeated measures correlation (rmcorr). This tool makesrmcorr more widely accessible, providing a graphical interface for performing andvisualizing the output of analysis with rmcorr. In contrast to rmcorr, most widelyused correlation techniques assume paired data are independent. Incorrectly an-alyzing repeated measures data as independent will likely produce misleading re-sults. Using aggregation or separate models to address the issue of independencemay obscure meaningful patterns and will also tend to reduce statistical power.rmcorrShiny (repeated measures correlation Shiny) provides a simple and acces-sible solution for computing the repeated measures correlation. It is available at:https://lmarusich.shinyapps.io/shiny_rmcorr/.