Participants completed the EPQ-R-N, the Big-Five Mini-Markers Neuroticism scale (Big 5-N; Saucier, 1994), the broadband neuroticism scale from the International Personality Item Pool (IPIP-N; http://ipip.ori.org/newNEOKey.htm, extracted 12/11/07), and the Behavioral Inhibition System scale (BIS; Carver & White, 1994). To better measure the general neuroticism factor and to eliminate redundancy, we dropped 25 of the 60 original items from the IPIP-N. The revision to the IPIP-N was based on a confirmatory factory analysis guided by Goldberg’s (1999) facets. We retained or dropped items on the basis of factor loadings and item content. We dropped items with low factor loadings until omegahierarchical (ωh) began to decrease, and a final structural equation model indicated ωh was .81 (McDonald 1985, 1999; Uliaszek et al., in press; Zinbarg, Revelle, Yovel, & Li, 2005; Zinbarg, Yovel, Revelle, & McDonald, 2006). Coefficient ωh is the proportion of scale score variance accounted for by a general factor. For each neuroticism scale, Cronbach’s alpha ranged from .75 to .93. The EPQ-R-N has three lower-order facets; analyses of our screening data indicated that coefficient ωh is .68 for the EPQ-R-N (Mor et al., 2008).
