Previous work has shown strong covariation between mood and anxiety disorders, which is consistent with one common internalizing psychopathology factor. Our data are consistent with the notion that the personality trait of neuroticism accounts, at least in part, for variance common across internalizing disorders. One possibility for future research is that neuroticism is the sole general factor in anxiety and depression (that is, is common to all anxiety and mood disorders). However, other studies that have examined neuroticism and internalizing psychopathology have found associations smaller than was found in the current study. For example, Krueger et al. (2001) found that negative emotionality and internalization correlated .27 in men and .22 in women. In contrast to the current study, participants in Krueger et al. (2001) were middle aged, so it is possible that with older age, other factors beyond neuroticism become increasingly important in mood and anxiety disorders. Future studies might examine how other factors, in addition to neuroticism, may be common to mood and anxiety disorders. In addition, specific factors in different forms of psychopathology need further exploration. Research examining
