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. Author manuscript; available in PMC: 2015 Oct 13.
Published in final edited form as: J Abnorm Psychol. 2012 Mar 5;121(3):659–667. doi: 10.1037/a0027489

Table 1.

Participant Group Characteristics

PCL-R total PCL-R F1 PCL-R F2 Age Est. IQ
Psychopaths (n = 20) 31.7 (1.6) 11.4 (1.7) 17.0 (1.5) 32.5 (6.0) 101.6 (9.8)
Intermediate (n = 19) 25.3 (2.5) 9.1 (1.7) 14.0 (2.4) 28.5 (6.3) 102.8 (10.0)
Non-psychopaths (n = 25) 14.2 (3.4) 5.0 (3.0) 7.6 (2.7) 32.0 (7.1) 102.1 (11.8)

Note. Est. IQ = Estimated IQ based on the Shipley Institute of Living Scale (Zachary, 1986). For each group, means are presented with standard deviations in parentheses. The three participant groups did not significantly differ with respect to age (F = 2.2, p = .13) or estimated IQ (F = 0.06, p = .94).