ABSTRACT
Test takers give their responses to items on a response scale. This scale can be discrete or continuous. Examples of discrete scales are the dichotomous scale, which has two categories (e.g., correct or incorrect and yes or no), and the ordered polytomous scale that has more than two ordered categories (e.g., a five-point Likert scale). Examples of continuous response scales are a continuous line segment and time to complete a task.
