Verbal or nonverbal QR and knowledge?

It is certainly worth asking about the extended norms. Note that the publisher estimates that only about 11-15 children in each year of age across the entire USA will obtain additional information by using the extended IQ. Also, not every examiner owns the sold-separately interpretive manual that contains the extended norms, so he/she may not be able to compute it for you.

...pronounced like the long vowel and first letter of the alphabet...