Figure 2.
Learning curves regarding olfactory discrimination of a novel odorant for 9 minipigs. Mean percent correct responding on each 160-trial session. S+ was a 95% aqueous solution of ethanol, and S- was the water solvent. Horizontal reference line (y = 75) denotes criterion of success. To master the task, individuals should reach at least 75% correct responses in one 160-trial session.