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The preexposure effect scales with number of tastes in the preexposure session. Animals were preexposed to W, W, and N, or W, N, and C during three preexposure sessions. Strength of conditioning increased with the size of the preexposure array. X-axis represents aversion indices for each animal (CSTestConsumed mL/CSConditioningConsumed mL). Error bars represent SEM. (*) P < 0.05.
