1. For a detailed discussion of the importance of cognitive structure in verbal learning, see: Ausubel, The Psychology of Meaningful Verbal Learning. New York; Grune and Stratton 1963.
2. Assimilation and accommodation which are Piagetian terms are explained in and , Piaget's Theory of Intellectual Development, Englewood Cliffs, N.J., Prentice-Hall 1969.
3. The effect of behavioral objectives on student achievement in college chemistry
4. A comparative study of the effect of behavioral objectives on class performance and retention in physical science
5. For example, see: Preparing Instructional Objectives, Palo Alto, California, Fearon Press, 1962.