Diagnostic assessment is currently an active research area in educational measurement. Literature related to diagnostic modeling has been in existence for several decades, but a great deal of research has been conducted within the last decade or so, especially within the last five years. The author summarizes the key components in the application…

Describing the types and uses of tests may seem to be an easy task, but it is not as straightforward as it may first appear. Tests vary on many different characteristics, are used in many different ways, cross the typical assessment categories, and in some cases are so unique as to from a category unto themselves. This chapter explores many…