5 Wizard of Oz (WOZ) simulation

Predictive:

System development: interactive behaviour with system is unknown

System is simulated by a person (or a team) - the Wizard

Interaction in the loop is computer controlled

System in the loop:

Replacement of parts of the loop with system components

Gradual reduction of the role of the Wizard

Final stage: No Wizard is needed any more.

`Ecological validity' - Turing in reverse?