principles and methodology focus the CAI design process on supporting learners'
development of their mental schemas. Finally, we designed, developed and implemented
a prototype web based, multimedia training system in accordance with the proposed CAl
design principles. As a partial instantiation of the proposed principles and methodology,
this prototype C AI provides a proof-of-concept. The design and effectiveness of the
prototype CAI has been tested in a series of experiments. The corroborating evidence
from these studies indicates that the prototype C.AI is well-designed, usable, aid an
effective training tool. The demonstrated success of the prototype provides evidence of
the merits of the proposed principles and methodology.