A variant of the agent scenario, which does not include an anthropomorphic
realization, is that the computer employs a user model to guide an adaptive interface.
The system keeps track of user performance and adapts the interface to suit
the users' needs. For example, when users begin to make menu selections
rapidly, indicating proficiency, advanced menu items or a command-line interface
should appear. Automatic adaptations have been proposed for interface
features such as content of menus, order of menu items (see Section 7.5.2 for evidence
against the helpfulness of this strategy), type of feedback (graphic or tabular),
and content of help screens. Advocates point to video games that increase
the speed or number of dangers as users progress though stages of the game.
However, games are notably different from most work situations, where users
have goals and motivations to accomplish their tasks.