“…The associations between depression and the dimensions of extraversion and neuroticism have been assessed in various studies in students [Clarke, 2004;Hepburn and Eysenck, 1989;McCleery and Goodwin, 2001;Saklofske et al, 1995;Williams, 1990], in family members of patients with depression [Duggan et al, 1995;Katz and McGuffin, 1987], in twins [Kendler et al, 1993b], in other nonclinical settings [Boyce et al, 1991;Christie and Venables, 1973;Farmer et al, 2002], and in clinical settings [Bech et al, 1986;Berlanga et al, 1999;Boyce and Parker, 1985;Coppen and Metcalfe, 1965;Cuijpers et al, 2005;Duggan et al, 1991;Garside et al, 1970;Julian et al, 1969;Kendell and DiScipio, 1968;Ranjith et al, 2005;Ulusahin and Ulug, 1997;Weissman et al, 1978] but rarely in the general population [Bienvenu et al, 2004;Cox et al, 2004]. In addition, researchers have investigated the dimensions of extraversion and neuroticism (with an abbreviated scale) in the general population in one study [Goodwin et al, 2002], and the dimension of neuroticism alone in twins [Fanous et al, 2002;Kendler et al, 1993aKendler et al, , 2002Kendler et al, , 2004Roberts and Kendler, 1999], in relatives of depressive patients [Sham et al, 2000], and in the general population [de Graaf et al, 2002;Henderson et al, 1998].…”