The use of the concept of abstraction has been disseminated within the conditioning theory, predominantly permeated by operational categories, which has allowed it to be considered equivalent to the concepts of categorization and concept formation. Consequently, the taxonomies of levels of abstraction are formulated based on morphological criteria. In the present paper, the characteristics of these uses are described, some shortcomings are identified around their definition based on operational and morphological categories, and an alternative definition of abstract behavior and a taxonomy of complexity levels from a perspective interbehavioral is proposed.