Fig. 3.

a The amount of time spent in the initial ‘preferred’ context before and after 14 days of conditioning. Frogs receiving AMPH paired with the non-preferred context showed decreased time spent in the preferred context following conditioning. Control animals did not. b The strength of conditioned preference. The change in the amount of time spent in the non-preferred side following conditioning, relative to baseline. ∗ p < 0.05, ∗∗ p < 0.01.