 KABC did not assess the Arousal-Attention, and Planning functions, as CAS did, until K-ABC II appeared in 2004.The latter provides two theoretical bases, one of them in Luria (1966) and by default, the 4 PASS processes) and the other in Cattell-Horn-Carroll model (CHC) which is essentially an elaboration of fluid and crystallized intelligence (McGrew 2005).Some may consider this a strength of KABC-II.