Table 5.
PPI-SF Estimated Parameters From GRM
| Factor | Item | α | β1 | β2 | β3 | Factor | Item | α | β1 | β2 | β3 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Blame externalization | 1 | 2.63 (.17) | −1.60 (.13) | 2.27 (.15) | 4.49 (.23) | Coldheartedness | 1 | 1.09 (.11) | −.31 (.07) | 1.90 (.10) | 3.92 (.19) |
| 2 | 2.73 (.17) | −1.99 (.14) | 2.12 (.15) | 4.47 (.23) | 2 | 1.25 (.12) | .54 (.08) | 2.69 (.13) | 3.93 (.19) | ||
| 3 | 1.90 (.12) | −.55 (.09) | 2.13 (.12) | 3.69 (.17) | 3 | 1.20 (.11) | −.67 (.08) | 1.90 (.10) | 3.77 (.18) | ||
| 4 | 1.11 (.08) | −1.18 (.08) | 1.20 (.08) | 2.49 (.11) | 4 | 1.12 (.11) | .49 (.07) | 2.19 (.11) | 3.66 (.17) | ||
| 5 | 1.44 (.09) | −.47 (.08) | 1.25 (.09) | 2.49 (.11) | 5 | .45 (.07) | −.92 (.07) | .92 (.07) | 2.35 (.10) | ||
| 6 | 1.58 (.09) | −1.62 (.10) | 1.32 (.09) | 3.06 (.13) | 6 | 1.03 (.10) | −.92 (.08) | 1.26 (.08) | 3.16 (.14) | ||
| 7 | 1.32 (.08) | −2.20 (.10) | .53 (.08) | 2.21 (.10) | 7 | .52 (.08) | −2.27 (.10) | −1.00 (.07) | .48 (.06) | ||
| AIC = 19,278; BIC = 19,422; χ2 (16,286) = 8,144, p = 1.00 | AIC = 19,543; BIC = 19687; χ2 (16,304) = 7,838, p = 1.00 | ||||||||||
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| Social potency | 1 | 1.59 (.11) | −5.21 (.27) | −3.00 (.14) | .62 (.08) | Impulsive nonconformity | 1 | 1.04 (.10) | −.07 (.07) | 1.98 (.10) | 3.49 (.16) |
| 2 | 1.70 (.11) | −3.51 (.16) | −.99 (.09) | 1.66 (.10) | 2 | 1.19 (.10) | −1.11 (.08) | 1.32 (.09) | 2.95 (.14) | ||
| 3 | 1.64 (.11) | −3.23 (.15) | −.70 (.09) | 1.85 (.11) | 3 | 1.16 (.09) | −1.50 (.09) | .79 (.08) | 2.87 (.13) | ||
| 4 | 1.79 (.11) | −2.68 (.13) | −.77 (.09) | 1.49 (.10) | 4 | 1.36 (.11) | −1.52 (.10) | .76 (.08) | 2.79 (.13) | ||
| 5 | 1.90 (.12) | −3.19 (.15) | −1.26 (.10) | 1.18 (.10) | 5 | 1.26 (.12) | .59 (.08) | 1.89 (.11) | 3.29 (.16) | ||
| 6 | 1.27 (.09) | −3.34 (.14) | −1.05 (.08) | 1.46 (.09) | 6 | 1.13 (.11) | .47 (.07) | 1.52 (.09) | 2.45 (.12) | ||
| 7 | 1.10 (.08) | −2.55 (.11) | −.85 (.08) | 1.43 (.08) | 7 | .37 (.07) | −1.24 (.07) | .57 (.06) | 2.00 (.09) | ||
| AIC = 19,734; BIC = 19,878; χ 2 (16,291) = 7,339, p = 1.00 | AIC = 20,169; BIC = 20,313; χ 2 (16,291) = 10,264, p = 1.00 | ||||||||||
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| Machiavellian | 1 | 1.94 (.14) | −2.08 (.13) | 1.19 (.10) | 3.67 (.19) | Stress immunity | 1 | 1.89 (.11) | −1.97 (.11) | −.10 (.09) | 2.66 (.13) |
| 2 | 1.84 (.13) | −1.30 (.10) | 1.54 (.11) | 3.70 (.18) | 2 | 2.33 (.14) | −3.44 (.17) | −.78 (.11) | 2.65 (.15) | ||
| 3 | .88 (.08) | −1.51 (.08) | .72 (.07) | 2.83 (.12) | 3 | 2.16 (.13) | −4.22 (.20) | −1.36 (.11) | 2.10 (.13) | ||
| 4 | .68 (.07) | −2.08 (.09) | −.17 (.06) | 2.03 (.09) | 4 | 1.26 (.08) | −2.27 (.10) | −.38 (.07) | 1.85 (.09) | ||
| 5 | .99 (.09) | .11 (.07) | 1.89 (.09) | 3.37 (.15) | 5 | 1.47 (.09) | −3.41 (.15) | −1.40 (.09) | 1.42 (.09) | ||
| 6 | 1.08 (.08) | −1.31 (.08) | 1.21 (.08) | 2.70 (.12) | 6 | 1.07 (.07) | −2.02 (.09) | −.17 (.07) | 1.84 (.09) | ||
| 7 | 1.23 (.09) | −1.57 (.09) | .97 (.08) | 3.23 (.14) | 7 | 1.02 (.07) | −.96 (.07) | .85 (.07) | 2.88 (.12) | ||
| AIC = 20,255; BIC = 20,399; χ 2 (16,281) = 7,937, p = 1.00 | AIC = 20,422; BIC = 20,566; χ 2 (16,286) = 8,088, p = 1.00 | ||||||||||
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| Fearlessness | 1 | .93 (.07) | −.82 (.07) | .14 (.07) | 1.45 (.08) | ||||||
| 2 | 2.06 (.14) | −.65 (.10) | .82 (.10) | 2.74 (.15) | |||||||
| 3 | 1.52 (.10) | −.93 (.09) | .23 (.08) | 1.76 (.10) | |||||||
| 4 | 1.21 (.09) | −.01 (.07) | 1.16 (.08) | 2.57 (.12) | |||||||
| 5 | 1.47 (.10) | −1.33 (.09) | −.01 (.08) | 1.60 (.09) | |||||||
| 6 | 1.90 (.13) | −.61 (.09) | .61 (.09) | 1.82 (.11) | |||||||
| 7 | 1.09 (.08) | −1.01 (.08) | .73 (.07) | 2.57 (.11) | |||||||
| AIC = 21,691; BIC = 21,835; χ 2 (16,330) = 14,900, p = 1.00 | |||||||||||
Note. α = estimated slope parameters; β1, β2, and β3 = estimated category threshold parameters. Standard errors of the estimated parameters are presented in parentheses. Results for the carefree nonplanfulness subscale is not available as the subscale did not meet the unidimensional assumption for IRT analyses.