Skip to main content Accessibility help
  • Print publication year: 2020
  • Online publication date: May 2020

Chapter 2 - Dichotomous Tests


For a test to be useful, it must be informative; that is, it must (at least some of the time) give different results depending on what is going on. In Chapter 1, we said we would simplify (at least initially) what is going on into just two homogeneous alternatives, D+ and D−. In this chapter, we consider the simplest type of tests, dichotomous tests, which have only two possible results (T+ and T−).