Table 3.

Item Response Analysis of the Swedish version of the Dark Triad Dirty Dozen.

Item	a	b1	b2	b3	b4	b5	b6
Machiavellianism 1: Manipulate	2.33	−0.72	0.25	0.72	1.23	2.11	2.89
Machiavellianism 2: Deceit	1.46	−0.93	0.11	0.74	1.12	1.95	2.71
Machiavellianism 3: Flattery	1.61	−1.71	−0.85	−0.28	0.21	1.33	2.24
Machiavellianism 4: Exploit	2.29	−0.38	0.57	1.08	1.67	2.82	3.43
Narcissism 1: Admire	3.23	−1.21	−0.63	−0.21	0.34	1.13	1.93
Narcissism 2: Attend	2.62	−1.72	−1.13	−0.55	0.05	0.91	1.96
Narcissism 3: Prestige	2.05	−1.19	−0.44	0.13	0.71	1.56	2.45
Narcissism 4: Favors	1.32	−0.50	0.58	1.35	2.21	3.22	4.60
Psychopathy 1: Remorse	1.42	0.34	1.19	1.81	2.40	2.84	3.87
Psychopathy 2: Unconcerned	2.16	0.53	1.39	1.86	2.08	2.54	3.24
Psychopathy 3: Callous	2.81	0.11	0.80	1.25	1.74	2.21	2.71
Psychopathy 4: Cynical	1.58	−0.35	0.39	0.92	1.44	2.29	3.24

Note. b₁ to b₆ reports the item locations, reflecting the threshold level of the latent trait necessary to have at least a 50% probability of endorsing the next scale-step.