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Three-chambered testing apparatus for social interaction: mice from all groups except the Pb exposed group exhibited a normal preference to spend significantly more time with a novel stranger mouse rather than with a novel object. Data were analyzed with a 2-tailed paired t-test for each treatment group. The preference was statistically significant in all groups (0.002 < p < 0.04 range), but Pb treated group (p > 0.05). ∗ denotes statistical significance.
