Previous studies have shown that our neuroticism scales have adequate psychometric properties. Caruso, Witkiewitz, Belcourt-Dittloff, and Gottlieb (2001) found that coefficient alpha for the EPQ-R-N ranged from .69 to .97 (median=.83) across 69 samples. Muris, Rassin, Franken, and Leemreis (2007) and Ross, Millis, Bonebright, and Bailey (2002) both found the BIS to have adequate reliability (alpha>=.73). The BIS had convergent validity with our other measures of neuroticism (r’s ranged from .47-.59 in our study). Saucier (1994) reported adequate reliability for the Big 5-N scale (alpha=.78), as well as convergent validity with Goldberg’s (1992) neuroticism scale. The neuroticism scales of the IPIP had adequate reliability (alphas ranged from .77 to .88), and convergent validity with the NEO (validity coefficients ranged from .72 to .80; see http://ipip.ori.org/newBroadbandTable2.htm, extracted 12/11/2007).
