Although content validity--how well each item of an instrument represents the construct being measured--is foundational in the development of an instrument, statistical validity is also important to the decisions that are made based on the instrument. The primary purpose of this study is to demonstrate how simulation studies can be used to assist…

Findings regarding formats and scoring formulas for multiple-choice test items with more than one correct response are presented. Strong cluing effects in the Type K format, increasing the correct score percentage and reducing test reliability, recommend using the Type X format. Alternative scoring methods are discussed. (Author/CM)

The author surveys literature and practice, primarily in Great Britain and the United States, about multiple-choice testing, comments on criticisms, and defends the state of the art. Varous item types, item writing, test instructions and scoring formulas, item analysis, and test construction are discussed. An extensive bibliography is appended.…