The Preschool Preposition Test (PPT) is a receptive language test which examines the comprehension of verbal directions using spatial prepositions or prepositional phrases, together with manipulative objects. The 23 items ask the child to place a ball in back of or into another object, and so on. The test is designed for 3 to 5-year old children…

An elementary survey of item characteristic curve theory, centered around the problems of individualized (tailored) testing, is presented. Following the introduction, discussions are provided of the following: Test Theory for Itemized Tests; The Guttman Scale; Item Characteristic Curve Theory; An Alternative Model; Specialization, Application, and…