Gail makes a good point.

On the WISC-V, for most children, I actually prefer it for documenting NVLD, over the WISC-IV, because it separates fluid reasoning from visual spatial abilities. Some learners with perceptual deficits have strong enough abstract thinking that their fluid reasoning scores drag their WISC-IV PRIs up, which clouds the NVLD picture at the index level.

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