In two experiments, researchers examined the transformation of the nonarbitrary properties of sexual stimuli in accordance with multiple stimulus relations. First, simple discrimination and free-operant procedures were used to present small, medium, or large sexually explicit images. Contextual functions of "More than" and "Less than" were then established for two cues by using a relational pretraining procedure. Next, a linear-series conditional discrimination training design was used to train and test for the formation of three, three-member equivalence relations. Then, emergent relations of More than and Less than were tested among the stimuli. The nonarbitrary relations of More than ...