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Table 2 Mean Scores on Measures of Psychopathic Traits and Emotional Reactivity to Unpleasant Pictures by HIA-CP Group Designation

From: Revisiting Lynam's notion of the "fledgling psychopath": are HIA-CP children truly psychopathic-like?

 

non-HIA-CP

HIA-only

CP-only

HIA-CP

t-values

Variable

M

(SD)

M

(SD)

M

(SD)

M

(SD)

Cont. 1

Cont. 2

Cont. 3

Psychopathy (Total)

8.40

(4.49)

10.42

(4.13)

12.12

(5.30)

15.50

(6.95)

6.72***

3.88***

2.22†

   Narcissism

2.24

(1.97)

2.30

(1.65)

3.18

(1.59)

4.20

(2.91)

4.32***

3.37**

1.56

   Impulsivity

3.64

(1.82)

4.85

(1.68)

4.76

(1.75)

6.20

(2.19)

6.15***

2.62*

2.39*

   Callous-Unemotional

3.00

(2.56)

3.87

(2.64)

4.27

(3.03)

5.53

(3.79)

3.88***

2..08†

1.35

Arousal to Unpleasant Pictures (IAPS)

5.66

(2.28)

4.87

(2.56)

3.88

(2.63)

4.74

(2.78)

1.95

< 1

1.28

  1. Note. Total, Narcissism, and Impulsivity score come from parental report of the Antisocial Process Screening Device (APSD). Callous-Unemotional is a composite of items from parent reports of the APSD callous-unemotional traits scale and the Strength and Difficulties Questionnaire (SDQ) prosocial behavior scale. HIA (Hyperactivity) and CP (Conduct Problems) come from teacher report on the SDQ. IAPS = International Affective Pictures System. Cont. 1 = contrast comparing mean non-HIA-CP to HIA-CP; Cont. 2 = contrast comparing mean HIA-only to HIA-CP; Cont. 3 = contrast comparing mean CP-only to HIA-CP. Type I error was maintained at α = .05 for all pairwise comparisons using Dunnett's procedure. t- values are based on 486 (APSD), 456 (Callous-Unemotional), and 599 (IAPS) degrees of freedom.
  2. * p < .05; ** p < .01; *** p < .001; † 1-tailed test, p < .05.
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Child and Adolescent Psychiatry and Mental Health

ISSN: 1753-2000