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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Neurotoxicol Teratol. 2009 Jan 21;31(3):149–158. doi: 10.1016/j.ntt.2008.12.006

Fig. 1.

Fig. 1

Ratio of reinforced:non-reinforced responses as a function of exposure group. Data are collapsed across cohort, sex, and testing block. *Significant difference from the control group (p<0.05), +Significant difference from the 1.5 ppm MeHg group and the 4.5 ppm MeHg group (p<0.05), ∞Significant difference from the 1.0 mg/kg PCB + 1.5 ppm MeHg group (p=0.15) with marginally significant difference from 3.0 mg/kg PCB + 4.5 ppm MeHg group (p=0.053), #Significant difference from the 1.0 mg/kg PCB + 1.5 ppm MeHg group and the 3.0 mg/kg PCB + 4.5 ppm MeHg group (p<0.01).