 Developed and published in 1997 by J.P. Das, PhD of the University of Alberta and Jack Naglieri, PhD, then at Ohio State University, the CAS has its theoretical bases both in the neuropsychology of Luria as well as in cognitive psychology.CAS is based on the planning, attention-arousal, simultaneous and successive (PASS) cognitive processing theory (or the PASS Theory of Intelligence), a modern theory within the information-processing framework (Das, Naglieri & Kirby, 1994).Roots of CAS are in Luria's (1973) organization of cognitive functions in the brain as well as in cognitive psychology of Baddeley, Estes, Posner and other contemporary psychologists.