Figure 1.

Odorants used in the main experiments reported here. Unless otherwise noted, odorants were used at 100 ppm based on vapor pressure. In Experiment 1, animals were trained in the active-training task with the same set of odorants as were used for the non-task-related exposure in the home cage. Some animals were trained with ethyl esters and some with binary mixtures varying in concentration ratio. Results from the 2 odorant sets were combined for analyses.