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Research suggests that the relational completion procedure (RCP) is effective for studying derived relations of same and opposite. Previously, procedural parameters, such as the presence or absence of a confirmatory response requirement, were found to have a facilitative effect on the number of training trials to criterion and overall arbitrary test pass rate (i.e., yield). These experiments report on the manipulation of additional potentially important parameters-the presence or absence of selection-based feedback, 4 vs. 8 trial types and of a linked nonarbitrary and arbitrary training phase-across both the RCP and matching-to-sample (MTS) protocols with either 3 or 5 comparisons. During selection-based feedback, after the production of the confirmatory response, the sample, contextual cue, and selected comparison were presented along with corrective feedback. During the linked nonarbitrary-arbitrary phase, in the presence of the sample stimulus and the same and opposite contextual cues, respectively, selections of a nonarbitrary comparison stimulus at either end of a specified physical dimension were reinforced. Findings indicated a trend for improved performance with the inclusion of selection-based feedback and the linked nonarbitrary-arbitrary phase. There was a significant difference in yield between the RCP and MTS conditions (84% vs. 56%, respectively). The implications of the findings for contemporary research on derived relational responding are discussed.
Key words: derived relational responding, matching-to-sample, relational completion procedure, relational frames, same, opposite, adult humans
Research on derived stimulus relations has grown exponentially over the past few decades (e.g., Dymond & Critchfield, 2001; Dymond, May, Munnelly, & Hoon, 2010; Rehfeldt, 2011). In 1991, Steele and Hayes reported the first demonstration of contextually controlled derived stimulus relations of sameness and opposition. Nowadays, the procedures described by Steele and Hayes (1991) to train and test contextually controlled derived stimulus relations continue to be used in numerous studies. These procedures involve two sequential phases. First, to study multiple stimulus relations such as same and opposite, it is necessary to establish contextual functions for two cues using nonarbitrary stimuli related along formal (i.e., physical) dimensions. In the nonarbitrary relational training phase, a contextual cue, a sample, and two or more comparison stimuli are presented on each trial. If the cue designated OPPOSITE1 is presented, choosing a comparison stimulus that is furthest removed from the sample along a specified physical dimension is...