et al., 2005; Kiuru et al., 2010). The terms selection and influence have different denotations across studies. In this study, we will use them to refer to causal processes that are distinct from latent genetic and environmental correlations (Figure 1). We note that, while our use of the term “causal” is consistent with much of the literature, the “causal” processes described herein should be interpreted as theoretically causal; the nature of the data, we cannot formally ascribe causation. The implications of distinct mechanisms will be discussed.
