Effect of context switch on relative odor preference of crickets that received extended training and were not given water (A) or were given water until satiation (B) before being tested. (A) Relative preference for peppermint odor shown by two groups of crickets that received extended (four-trial × 3 d) training under illumination and that were tested under illumination (extended-same group) or in the dark (extended-different group). Relative preference for peppermint odor shown by another group that received both extended (four-trial × 3 d) unpaired training and testing under illumination (extended-unpaired group). None of the crickets were given water before the test was conducted. (B) Relative preference for peppermint odor shown by two groups that received extended training under illumination and were given water until satiation before the test, which was conducted under illumination (extended-same group) or in the dark (extended-different group). Relative preference for peppermint odor shown by another group that received extended unpaired training under illumination and water satiation before the test was conducted also under illumination (extended-unpaired group). The relative odor preferences are shown as PIs for the conditioned odor. The top trace in each figure indicates the schedule of the training and the test. Statistically significant differences are indicated by asterisks. M–W test, Holm's method, (NS) P > 0.05, (*) P < 0.05, (***) P < 0.001. The sample size is shown at each graph.