Establishing derived reinforcers via stimulus equivalence.

If one of several stimuli in an equivalence class acquires a function, it transfers to all members of the respective class. Even though research has demonstrated this transfer across a variety of stimulus functions (e.g., discriminative), few studies have focused on the transfer of the reinforcing function. The current study extended previous literature by establishing derived reinforcers using conditional discrimination training with six neurotypical adults. We established three 4-member equivalence classes and then created a discriminative stimulus in one member by correlating it with reinforcement. We also expanded classes by adding a stimulus to each class and testing its function. During the transfer of function tests, five out of six participants chose the derived reinforcers more than the other stimuli. Three participants required remedial training or testing prior to demonstrating transfer of function. Results show that stimulus equivalence training is an effective and efficient paradigm to establish derived reinforcers.