Abstract: A system and method of diagnosing the onset and monitoring the progression of cognitive impairment may incorporate administering one or more psychological tests and instructing a subject regarding rules for responding to the one or more tests without providing cultural cues such as may be introduced in language-based instruction techniques. Proper test responses may be simulated during an instruction phase preceding the testing phase. An apparatus, system, and method of testing cognitive function may be implemented in a computerized system.