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Session 7. The mean +/− SEM total number of frequency modulated 50 kHz USV at low (−1SD), mean, and high (+1SD) levels of inescapable novelty response at the mean and 1SD above and below the mean of the H-USV test response (x-axis). The H-USV test’s prediction of treatment-induced FM USV depended on the IEN response. Higher IEN responders vocalized less, p<.01. This interaction was only observed after repeated administrations of the high dose of amphetamine and not the low dose, p<.05.
