The change in PavCA during Acquisition predicted the Final PavCA Index in control rats. Individual data points are shown for control (purple, n = 7) and eNpHR rats (orange, n = 10) with their respective regression lines. Acquisition Index reflects (Δ PavCA Index between Sessions 3 and 1), and the Final Index reflects Session 6 PavCA Index. The Acquisition Index significantly predicted the Final PavCA Index in controls, but not in eNpHR rats. *p < 0.05.