For efficiency, it was expected that learners in
the motivationally adaptive CAI would need
less time to finish their learning than those who
had to go through all the motivational strategies
in the motivationally saturated CAI. Also, it was
expected that the motivationally minimized CAI
would require less time to finish than the other
conditions because no motivation enhancement
strategies were provided. The analyses of efficiency
showed that the motivationally adaptive
and motivationally minimized conditions had
higher efficiency than the motivationally saturated
condition. These findings support the need
for providing motivational strategies adaptively
for efficiency. The excessive provision of motivational
strategies in the motivationally saturated
CAI resulted, as expected, in lower efficiency
than the motivationally minimized CAI, while
the motivationally adaptive CAI showed the
same efficiency with the motivationally minimized
CAI.