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. 2014 Mar 4;77(6):293–312. doi: 10.1080/15287394.2014.867210

FIGURE 2.

FIGURE 2.

Associations between performance on the Rey Auditory Verbal Learning Test (RAVLT) Trials 1–5: Sum of Learning & Memory and acute Hg exposure among boys. Scatter plots and simple linear regression fit lines of RAVLT Trials 1–5: Sum test scores by acute Hg exposure (ln[HgU + 1]) are plotted to distinguish boys with the COMT Group B haplotype Mut (ATCAmet-ATCAmet) (open circles, solid line) versus those with Not Group B haplotype status (closed circles, dashed line). The linear slope r2 values for Group B and Not Group B are .126 and 2.562E-4, respectively (p < .02). Thus, while acute Hg exposure explains 12.6% of the performance variation among boys with the Group B haplotype, Hg explains virtually no variation among those with Not Group B status.