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. 2016 Jul 6;125(2):230–237. doi: 10.1289/EHP258

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Postnatal Mn exposure causes dose and duration-dependent deficits in the selective attention task. Accurate responses (%) for (A) the early postnatal Mn groups and (B) the lifelong postnatal Mn groups, as a function of session block for each distraction condition (no distractor, odor distractor 1 second (s) or 2 s into the pre-cue delay interval) (n = 21–23/group). * and ** indicate p ≤ 0.05 and p ≤ 0.01 versus controls, respectively, and † and †† indicate significant difference (at p ≤ 0.05 and p ≤ 0.01, respectively) between the early 25 group in (A) and the lifelong 25 mg Mn/kg/day group in (B). The statistical model included all five treatment groups, but results are presented by exposure duration for clarity.