The Digit Span Forward subtest of the Wechsler Intelligence Scale for Children–Fourth Edition was administered as a measure of verbal storage WM. Digit Span is a commonly
administered measure of WM in children. In this task, the
participant must repeat a series of numbers that are presented orally by the examiner. In Digit Span
Forward, the child is asked to repeat orally presented numbers in the same order. Performance is measured
by the number of trials recalled correctly. Participants’ raw scores are converted to scaled scores
based on age norms from a large representative sample with a mean of 10 and a standard deviation of
3.