 Curiously enough, few if any of the existing assessment instruments for these areas have emphasized the necessity of factor analysis.Insofar as constructive criticism goes, supplementary tests are necessary for extending the application of CAS.To begin with existing tests, the Successive subtests should have a nonverbal measure, such as Luria's test that asks participants to continue a series "+++__ __+++__ __+++__ __...", or a motor response of tapping to dot sequences such as "... .. ... .. ... ... .. " as given in Das, Kirby & Jarman (1979).