Figure 3.

Path diagram illustrating how exposure to PCB is included in the analysis. After a logarithmic transformation the observed PCB concentration is assumed to give an error prone reflection of the child's true expsoure represented by the latent variable η₈. The latent PCB and mercury exposures are assumed to be affected by the covariates and intake of whale meat. Furthermore, the two nerotoxicants are allowed to be correlated and hypothesized to affect the child's neurobehavioral functions. Notation: t(Whale) = log (Whale + 1).