USING THE SIMULTANEOUS PROTOCOL TO STUDY EQUIVALENCE CLASS FORMATION: THE FACILITATING EFFECTS OF NODAL NUMBER AND SIZE OF PREVIOUSLY ESTABLISHED EQUIVALENCE CLASSES

Abstract

The emergence of equivalence classes in college students is unlikely when all baseline relations are trained concurrently and all probes for emergent relations are then introduced concurrently (the simultaneous protocol). This experiment showed how the number of nodes and the size of previously established equivalence classes enhanced the emergence of new equivalence classes under the simultaneous protocol. First, one‐node three‐, five‐, or seven‐member classes or three‐node five‐ or seven‐member classes were established with college students. A sixth group received no pretraining. Then, the simultaneous protocol was used to establish new three‐node five‐member equivalence classes with all students. The speed and variability with which the baseline relations were established in the simultaneous protocol were inverse functions of number of nodes in the previously established classes, but not of their size. The percentage of subjects who showed the emergence of new equivalence classes under the simultaneous protocol was a direct function of number of nodes and size of pretrained classes. The additional time spent for pretraining greatly reduced the total training time needed to produce individuals who showed the emergence of classes under the simultaneous protocol. The total time saved was a direct function of number of nodes and number of stimuli in the pretrained classes.

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