Abstract

The present paper explores some of the characteristics and implications of the approach to scientific theories and theoretical concepts that developed under the auspices of mediational S—O—R neobehaviorism during the middle of the present century. Of special interest is the evaluation of scientific theories and theoretical concepts, notably "hypothetical constructs" and "intervening variables," in terms of realism, instrumentalism, and pragmatism. The paper argues that many contemporary behavioral theorists who embrace the aforementioned approach often fail to understand the verbal processes by which scientific verbal behavior develops. The result is an unfortunate confusion of epistemological principles that does not adequately distinguish among realism, instrumentalism, and pragmatism