ICC

ICC, or Intraclass Correlation Coefficient, is a statistic used to measure how closely related or consistent different measurements or ratings are when assessing the same thing. It helps determine whether repeated measures or different raters agree well, indicating reliability. For example, if multiple doctors measure blood pressure for the same patient, a high ICC means their readings are very similar, reflecting good consistency. Conversely, a low ICC suggests variability and less reliability in the measurements or assessments. ICC is commonly used in research to evaluate the dependability of tools, tests, or observations.