Temple of Artemis image carried through the streets and surrounded by maidens. In the Roman Imperial era, the emperor Commodus lent his name to the festival games, and might have sponsored them. From the Greek point of view, the Ephesian Artemis is a distinctive form of their goddess Artemis. In Greek cult and myth, Artemis is the twin of Apollo, a virgin huntress who supplanted the Titan Selene as goddess of the Moon. At Ephesus, a goddess whom the Greeks associated with Artemis was venerated in an archaic, pre-Hellenic cult image that was carved of wood (a "xoanon") and kept decorated with jewelry.
Equating the equating of tests administered to groups with similar abilities; for example, two tests administered to students in the same grade in two consecutive calendar years. Different tests are used to avoid practice effects. In terms of item response theory, equating is just a special case of the more general process of "scaling", applicable when more than one test is used. In practice, though, scaling is often implemented separately for different tests and then the scales subsequently equated. A distinction is often made between two methods of equating; "common person" and "common item" equating. Common person equating involves the administration