Abstract
Three groups of subjects received training in stimulus equivalence classes with a respondent-type training procedure. Stimulus contingency was positive for the first group, zero for the second, and negative for the third. Afterwards, all participants were tested with a matching-to-sample task for four baseline relations (A1-B1, A2-B2, C1-B1, and C2-B2), four symmetry relations (B1-A1, B2-A2, B1-C1, and C2-B2), and four combined symmetry and transitivity relations (A1-C1, A2-C2, C1-A1, and C2-A2). After this, they were retrained and retested twice. Explicit reinforcement was not programmed during the training or testing phases. The number of subjects who learned the baseline relations and showed the emergence of derived relations was higher in the positive contingency group than in the zero or negative contingency groups, although in all cases at least one retraining phase was required in order to reach the criteria. This finding contributes to the literature suggesting that stimulus pairing is the fundamental variable underlying emergent stimulus functions.
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Notes
Even though it is being assumed, in the present example, that subjects have named the stimuli, it is also suggested that this behavior of describing the relations among them functions as additional pairing trials since, as aforementioned, naming the stimuli (and verbal behavior in general) seems not to be essential for derived relations to emerge (Delgado et al., 2011; Tonneau & González, 2004, Experiment 4).
Due to time constraints, the experimental session could not last more than an hour.
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Acknowledgments
The present experiment was supported by an undergraduate grant from the Consejo Interuniversitario Nacional (CIN) and by the University of Buenos Aires (UBACyT-Code: 20020130100861BA). The authors would like to thank Dr. Mauricio Papini, Camila Cavalli, and Daniel Low for their useful comments on the manuscript.
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This study was funded by Consejo Interuniversitario Nacional (CIN) and University of Buenos Aires (UBACyT-Code: 20020130100861BA).
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Avellaneda, M., Menéndez, J., Santillán, M. et al. Equivalence Class Formation is Influenced by Stimulus Contingency. Psychol Rec 66, 477–487 (2016). https://doi.org/10.1007/s40732-016-0187-y
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DOI: https://doi.org/10.1007/s40732-016-0187-y