Understanding complex behavior: The transformation of stimulus functions

The transformation of stimulus functions is said to occur when the function s of one stimulus alter or transform the functions of another stimulus in a ccordance with the derived relation between the two, without additional tra ining. This effect has been demonstrated with a number of derived stimulus relations, behavioral functions, experimental preparations, and subject pop ulations. The present paper reviews much of the existing research on the tr ansformation of stimulus functions and outlines a number of important metho dological and conceptual issues that warrant further attention. We conclude by advocating the adoption of the generic terminology of relational frame theory to describe both the derived transformation of stimulus functions an d relational responding more generally.