In a previous publication, we argued why the behavioral psychology theory Relational Frame Theory (RFT) might be interesting for AGI researchers. This paper explores details of RFT in NARS. More specifically, we investigate different response patterns, such as equivalence, opposition, and comparison in NARS. An additional core feature of RFT is transformation of stimulus function which explains how arbitrary symbols can acquire various functions depending on the relational networks in operation. We demonstrate how NARS handles this process. Finally, future applied and basic research opportunities are discussed.