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Mean (+/− SEM) discrimination scores for the negative patterning (Neg Patt) task in Group Patterning and the biconditional (Bicon) task in Group Biconditional over 8-session blocks in Experiment 1. The discrimination score reflects a difference in elevation scores (see Figure 1) on reinforced and non-reinforced trials. Larger numbers indicate greater levels of conditioned responding on reinforced than non-reinforced trials.
