Wizard of Oz experiment

== English == === Etymology === Referring to a scene in which the Wizard of Oz hides behind a curtain to project an intimidating shadow image. === Noun === Wizard of Oz experiment (plural Wizard of Oz experiments) In the field of human-computer interaction, a research experiment in which subjects interact with a computer system that they believe to be autonomous, but which is actually being operated by an unseen human being.