So I googled the KOI, and found a paucity of research, with exactly one doctoral dissertation on it, in which the researchers found that there was a significant age effect on the KOI, and a low correspondence to the WISC-III. The age effect is relevant because the form covers a 4-year grade range. The researchers do not recommend the KOI as an adequate instrument for gifted screening, because of both false negatives and false positives.
http://ir.library.oregonstate.edu/x...VaughnNeelyElizabethI1994.pdf?sequence=1
