 The CAS meets at least two challenges, first in terms of its factor-analytic purity (Naglieri & Das, 1997 Interpretive handbook), and second in extending its scope by supplementary tests, especially for assessment of Executive Functions.The validity of CAS comprising the 4 PASS constructs is adequately supported by several books and studies (Das, Naglieri, & Kirby, 1994; Das, Kar & Parilla, 1996; Das, 2009).The CAS Interpretive Handbook, (Naglieri and Das, 1997) reported information about the factor structure of the CAS providing evidence that the PASS four-factor solution was the best solution based on the convergence of factor-analytic results, clinical utility of the four separate scores, evidence of strategy use and theoretical interpretation of the subtests.