Students earn points for each question they answer correctly, but do not lose points for skipping or incorrectly answering a question. When the test is graded, a child is first given a raw score, which provides the number of questions answered correctly out of the total number of questions (e.g., 46/60). Once the raw score is calculated, it is then converted to a School Ability Index (SAI) score. The SAI score is determined by comparing the raw scores of other children in the same age group. It is a normalized score, with an average of 100, a standard deviation of 16, and a maximum score of 150. This SAI score is then used to find which percentile a student falls into. Students who score about two standard deviations above the mean (a score of 132) generally fall into the top 2-3%, or the 97th-98th percentile.
