
54
Chapter Three
A Little Intelligence or a Lot?
that the systems are much more difficult to implement, and they still may
not infer correctly. There is a "slippery slope" for all intelligent interfaces,
including PBD systems: once the system shows a little intelligence, people
may expect it to be able to infer as much as a human would, which is well
beyond the state of the art. It is still an open problem to balance the sophis-
tication of the system with the expectations of users.
3.4 Feedback
In user studies of the Eager system, users were reticent to let the system au-
tomate their tasks because it provided no feedback about ...