Do you mean you would do all three tests and use the two scores of the three that are closest to each other? With DD, she decided ahead of time that she would do arithmetic instead of digit span. Possibly because DD told her she likes math in school, or because of what the NAGC says. I thought that testers had to decide ahead of time which tests would be used in scoring.

Do you have any thoughts as to why there would be a big gap between Digit Span and Letter-Number Sequence for DS? It seems like practically the same test. I think after the skull fractures/brain injury his scores were 10 and 14, and then 6 months later 11 and 15 (or something along those lines), so there was the same gap both times he did it.