an examination of the factor structure of the psychopathy checklist

index that adjusts for model complexity (e.g., the Tucker-Lewis Index; TLI). The p value
of the X 2 test should be nonsignificant indicating that the model adequately accounts for
the data. Similar to Kline (1998), Hu and Bentler (1999) have also demonstrated that the
CFI and the TLI are good measures of relative fit. The CFI and TLI are incremental fit
measures comparing the specified model with the worst case scenario, which is an
independence or null model; the TLI tends to be more adversely affected by the
estimation of additional parameters that do not improve model fit. In addition, the
RMSEA is the preferred index for gauging absolute goodness of fit, as well as model
misspecification (Hu & Bentler, 1999). A CFI and TLI ≥ .95 and RMSEA ≤ .06 indicate
excellent model fit, whereas a CFI and TLI ≥ .90 and RMSEA ≤ .10 indicate adequate
fit. Based on these authors’ recommendations, the chi-square, CFI, TLI, and RMSEA
were examined to determine the appropriateness of each model. In Table 1, CFA
results are presented for Hare’s (2003) two-factor model, Cooke and Michie’s (2001)
three-factor model, and Hare’s (2003) four-facet model. In Figure 3, correlations
between the three-factor model factors and PCL:YV items are displayed. See Appendix
A for a list of the PCL:YV items.
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