Why is Digit Span placed so early in the subtest order?
To avoid interference effects between Digit Span and Letter–Number Sequencing, these subtests were widely separated in the order of administration. back to top| In the Letter–Number Sequencing subtest, the examinee is instructed to repeat the numbers in ascending order first, and then the letters in alphabetical order. For Items 3–10, why is credit awarded if the examinee repeats the letters first in order and then the numbers in order? There is a distinction between reordering and sequencing: Reordering involves placing the numbers as a group prior to the letters as a group, and sequencing involves placing the numbers in numerical order and the letters in alphabetical order—regardless of which grouping comes first. The reason for instructing examinees to reorder the numbers before the letters is to provide a structured way of approaching the task, which is especially helpful for examinees that are anxious or have difficulty structuring their own work. The WAIS–IV UK version of Letter–
