From the point of view of the User, or from the point of view of a computer interfacing to them?

From the point of view of research who tries to get the context of current user's activity in a particular event.

The users motivation is informed by context, and the context is fedback from the motivation in such a way as to inform the context of the motivation. But motivation is tricky, it is not as simple as the model we call Will would seem to suggest. For one thing Libetts work seems to suggest that the motivation often comes before awareness is practical. I am a proponent of the Weak Attention model, where attention does not bow to will, so much as will is an illusion of unconscious processes, that feedback through awareness the impression of causality linked to the report, rather than to the unconscious response. Thus attention is not just the spotlight of concentration, but also the less obvious but no less important control that directs memory between processing stages within the mind, weakly linked to will.