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Number of correct trials for Brian during preexperimental training to establish manding for more–less with D1 and D2, more–less relations with A1 and A2; A-B, B-C, and test trials for derived baseline more–less mands with C1 and C2 (top); reverse B-C and test trials for derived reverse more–less mands with C2 and C1, B-C, and test trials for a return to baseline derived more–less mands with C1 and C2 (bottom).
