Why Percentile Ranks Tell You More Than Raw Scores
Drawing a parallel to the history of thermometry in medicine, Dr Buchanan notes that while clinicians once relied on “the hand on the forehead” to detect fever, modern practice demands the precision of a “measuring stick” to provide better therapy outcomes for mental health clinicians and their clients.
For behavioral health providers, percentile ranks in psychometrics offer an intuitive comparison against the general population; for instance, a score above the 90th percentile indicates a client is struggling significantly compared to 90% of the community.