Corrected scores were produced by using corrected age (i.e., chronological age subtracted by the number of weeks the child is preterm) when converting total raw scores to Scaled Scores for each subtest administered. For the subtests of Coding and Symbol Search, there are different items for children aged six to seven years and those aged eight to sixteen years. Therefore, it was not possible to produce corrected scores for these two subtests among those children who had a chronological age of eight years or older but a corrected age of seven years and eleven months or younger because of the differences in test items and hence the incompatibility of raw scores. For these children, chronological Scaled Scores were recorded as both not-corrected and corrected scores for these two subtests.