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. 2008 Jul;90(1):61–80. doi: 10.1901/jeab.2008.90-61

Fig 8.

Fig 8

The average percentage of hue-sample IRTs > 1500 ms (+ 1 SEM) for each group in Experiment 2 in which the predicted emergent sample behavior would be like that observed on a DRL schedule (“drl”) or on a FR schedule (“fr”) assuming acquired equivalence or adventitious reinforcement. The Group SID data are divided according to whether these pigeons were trained with oddity (O) contingencies or with different (D) comparisons on the hue-sample trials in Experiment 1.