Apollo Apollo Apollo (Attic, Ionic, and Homeric Greek: , "Apollōn" ( ) is one of the most important and complex of the Olympian deities in classical Greek and Roman religion and Greek and Roman mythology. The national divinity of the Greeks, Apollo has been variously recognized as a god of music, truth and prophecy, healing, the sun and light, plague, poetry, and more. Apollo is the son of Zeus and Leto, and has a twin sister, the chaste huntress Artemis. Seen as the most beautiful god and the ideal of the "kouros" (a beardless, athletic youth), Apollo is considered to be
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