ABSTRACT
In the last chapter we reported exploratory experiments designed to give a rough estimate of the speed variability among users and text-editing systems. In this chapter we engage in exploratory modeling to discover how well we can predict editing time with a simple model based on the assumption that all editing tasks require a constant amount of time. This model should be of service to our later studies in two ways. First, it should reveal something of the characteristic difficulty of the problem of modeling user behavior in text-editing. Second, it should serve as a baseline against which to compare more complex models.
