For almost two decades, there has been growing interest in what design-based research (DBR) can contribute to both educational practice and theory. Since its introduction into the literature, this orientation to educational research has repeatedly been likened to aeronautical engineering as a way to clarify its nature and argue its potential. This…

Evaluation of an individual's progress in an academic or training program requires evaluation of his achievement of a collection of behavioral objectives. The nature of the terminal behavior often imposes a hierarchy on the enabling and entering behaviors that can be used to lend additional meaning to classification of the learner's performance,…