“…A number of educators (e.g., Chiang, 1986;Lieber & Semmel, 1985;Romanczyk, 1986) have noted that research has not clearly validated the relative effectiveness of CAI as opposed to TA instruction. A few studies have begun to address this promise, but the claim is too broad to lend itself to precise empirical investigation (Clark, 1983), as instruction consists of multidimensional variables that are difficult to control.…”