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. Author manuscript; available in PMC: 2011 Aug 1.
Published in final edited form as: Psychoneuroendocrinology. 2010 Feb 6;35(7):1063–1073. doi: 10.1016/j.psyneuen.2010.01.007

Figure 2.

Figure 2

Mean infusions received by rats self-administering DHT (top) and vehicle (bottom). Means ± SEM for each FR are shown, along with the overall average ± SEM (right). * Significantly different from DHT FR1 (p < 0.05). # Significantly different from WT (p < 0.05). ## Significantly from vehicle (p < 0.05). Note that rats self-administering DHT received a relatively constant number of infusions, while rats self-administering vehicle received fewer infusions as the FR requirement increased.