You may wish to remove references to your DC's real name from your post, as these are public fora.
I would echo beginning from the child to interpret scores.
As to the much lower PSI: there are many other explanations for lower PSI, besides ADHD or EF, especially in very young children. In some cases, they are unaccustomed to timed tests, or have age-appropriate fine motor development (that gates pencil-and-paper processing speed performance), or are especially conscientious and reflective workers (probably not this one, since the examiner notes careless errors). There may be other concerns that affect PSI, such as visual tracking or acuity (sometimes you'll also see some effects in Block Design, one of the VSI subtests--though not always). Just a few items from a long list of possible factors.
