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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: Behav Processes. 2011 Feb 24;87(1):18–24. doi: 10.1016/j.beproc.2011.02.006

Figure 4.

Figure 4

Proportion of responses on the typically more preferred alternative as a function of nicotine dose. The open triangles show the average proportion of responses on the short (1-s) lever for the delay group. The closed triangles show the average proportion of responses on the large (3-pellet) lever for the magnitude group. “C” and “V” indicate control (no injection) and vehicle (potassium phosphate) injection, respectively. Vertical lines represent standard errors of the mean. Note truncated y-axis.