1. A

    Calculating SEM in test-retest study (ICC)

    Hi! I am involved in the writing of a thesis, where two raters are running a test-retest study to test the intra- and inter-rater reliability of a clinical test. Here the Standard Error of Measurement (SEM) needs to be reported, and the following formula should be used: SEM=SD x √(1-ICC). I...
  2. H

    Test-Retest Reliability Coefficient

    Hi Folks, Hopefully this is a relatively easy question. I collected data on a measure at two time points, and I would like to run a test-retest reliability check. Is a Pearson correlation coefficient the one to use, or are there other thoughts on this? Many thanks for your time!