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. Author manuscript; available in PMC: 2010 Sep 21.
Published in final edited form as: Pharmacol Biochem Behav. 2007 Nov 6;89(1):17–22. doi: 10.1016/j.pbb.2007.10.017

Fig. 2.

Fig. 2

Comparison of SD and F344 AMPH self-administering groups revealed a significant main effect of strain (F(1,7) =14.029; p =0.007) and a significant interaction between strains and days (p=0.001). Student Newman–Keuls posthoc analysis showed significantly more lever pressing for AMPH by SD than by F344 rats on days 4, 6, 7, and 8 (*p< 0.05). ICSA=intracranial self-administration, AMPH=amphetamine, NAcc=nucleus accumbens, SD=Sprague–Dawley, F344=Fischer 344.