“…Analogous to the developmental progression of the BD liability, behavioral inhibition, specifically when it is characterized by poor autonomic regulation (Marshall & Stevenson-Hinde, 1998), typically appears during early childhood in individuals who will later develop anxiety (Hirshfeld-Becker et al, 2007;McDermott, et al, 2009), and anxiety may be an earlier expression of the common NE liability than depression. Anxiety is more likely than depression to onset during childhood, depression in child and adolescent samples is most often comorbid with anxiety (Anderson, Williams, McGee, & Silva, 1987;Angold, Costello, & Erkanli, 1999;Fleming, Offord, & Boyle, 1989), and the onset of anxiety tends to precede the onset of depression (Hettema, Kuhn et al, 2006;Kessler et al, 2005;Woodward & Fergusson, 2001).…”