an examination of the factor structure of the psychopathy checklist

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Table of Contents Abstract ........................................................................................................................... ii Preface ........................................................................................................................... iii Table of Contents .......................................................................................................... iv List of Tables ................................................................................................................ vii List of Figures ............................................................................................................. viii Acknowledgements ....................................................................................................... ix Dedication ...................................................................................................................... xi 1 Introduction ......................................................................................................... 1 1.1 Why Study Psychopathy? .............................................................................. 2 1.2 Factor Structure of the PCL:YV ..................................................................... 6 1.3 Psychopathic Traits and Aggression ............................................................ 16 1.4 Goals of the Current Study .......................................................................... 26 1.4.1 Hypotheses ............................................................................................. 28 2 Method ............................................................................................................... 29 2.1 Sample ........................................................................................................ 29 2.2 Measures ..................................................................................................... 30 2.2.1 Psychopathy Checklist: Youth Version................................................... 30 2.2.2 Aggression Rating Form ........................................................................ 31 2.2.3 Instrumental-Reactive Coding Scheme .................................................. 32 2.2.4 Demographics, Offender History, and Offense Characteristics .............. 33 2.3 Procedure .................................................................................................... 33 iv
3 Results .............................................................................................................. 36 3.1 Coding Reliability .......................................................................................... 36 3.2 Descriptive Statistics ..................................................................................... 37 3.2.1 Offender Characteristics ........................................................................ 37 3.2.2 Victim Characteristics ............................................................................. 37 3.2.3 Index Offense Characteristics ................................................................ 38 3.3 Primary Analyses ........................................................................................... 41 3.3.1 PCL:YV Factor Structure ......................................................................... 41 3.3.2 ARF Factor Structure ............................................................................... 45 3.3.3 Principal Variables of Interest .................................................................. 45 3.3.3.1 Psychopathy ................................................................................ 45 3.3.3.2 Instrumentality.............................................................................. 46 3.3.4 Psychopathy and Instrumentality ............................................................. 48 3.3.4.1 PCL:YV Factor Model and its Association with Instrumental Aggression ............................................................................................... 51 3.4 Secondary Analyses ...................................................................................... 51 3.4.1 Analyses Based on Bootstrapped Data ................................................... 51 3.4.1.1 PCL:YV Factor Structure ............................................................. 52 3.4.1.2 ARF Factor Structure ................................................................... 53 3.4.1.3 PCL:YV Factor Model and its Association with Instrumental Aggression ............................................................................................... 53 3.4.2 Ethnicity ................................................................................................... 54 3.4.2.1 Psychopathy ................................................................................ 54 3.4.2.2 Instrumentality.............................................................................. 54 v
Page 1 and 2: AN EXAMINATION OF THE FACTOR STRUCT
Page 3: Preface Ethics approval for this re
Page 7 and 8: List of Tables Table 1 Confirmatory
Page 9 and 10: Acknowledgements I owe my deepest g
Page 11 and 12: To my family and friends, Thank you
Page 13 and 14: among female youth populations, the
Page 15 and 16: Third, it has been suggested that t
Page 17 and 18: only a small proportion of conduct-
Page 19 and 20: irresponsible, and antisocial tende
Page 21 and 22: A long line of research has demonst
Page 23 and 24: females. When a model is considered
Page 25 and 26: to do with whether the measure is w
Page 27 and 28: Understanding the factor structure
Page 29 and 30: (Leschied et al., 2001; Moretti, Ca
Page 31 and 32: psychopathic offenders were signifi
Page 33 and 34: instrumental aggression. However, w
Page 35 and 36: Given the relationships between the
Page 37 and 38: associated with self-report will be
Page 39 and 40: 1.4.1 Hypotheses The current thesis
Page 41 and 42: ecords, school records, medical rec
Page 43 and 44: 2.2.3 Instrumental-Reactive Coding
Page 45 and 46: eceiving services from YFPS. Althou
Page 47 and 48: 3 Results 3.1 Coding Reliability In
Page 49 and 50: This was followed by acquaintance v
Page 51 and 52: Figure 2. Percentage of cases by se
Page 53 and 54: index that adjusts for model comple
Page 55 and 56:
Item 1 Item 2 Item 4 Item 5 Item 6
Page 57 and 58:
(1-19), 38.7% scored in the moderat
Page 59 and 60:
offences, 28.6% were for revenge or
Page 61 and 62:
association between the dichotomous
Page 63 and 64:
from the original dataset. In other
Page 65 and 66:
in instrumental aggression was acco
Page 67 and 68:
etween the dichotomous psychopathy
Page 69 and 70:
psychopath based on a cut score of
Page 71 and 72:
the three-factor model was unable t
Page 73 and 74:
sample since violent offenders are
Page 75 and 76:
who also concluded that antisocial
Page 77 and 78:
they are less likely to use reactiv
Page 79 and 80:
more strongly related to instrument
Page 81 and 82:
Pickard, 2007; Barry, Pickard, & An
Page 83 and 84:
measure of psychopathy may be limit
Page 85 and 86:
Further, based on the relatively lo
Page 87 and 88:
score. Although this is a valid mea
Page 89 and 90:
Having access to a large sample, we
Page 91 and 92:
demonstrated, the utility of differ
Page 93 and 94:
malleable youth sample may facilita
Page 95 and 96:
Berkowitz, L. (1993). Aggression: I
Page 97 and 98:
Gender differences in mental health
Page 99 and 100:
Edens, J. F., Skeem, J. L., Cruise,
Page 101 and 102:
Frick, P. J., Cornell, A. H., Barry
Page 103 and 104:
Hare, R. D., & Neumann, C. S. (2006
Page 105 and 106:
Jones, S., Cauffman, E., Miller, J.
Page 107 and 108:
Lynam, D. R. (1996). Early identifi
Page 109 and 110:
Murrie, D. C., Cornell, D. G., Kapl
Page 111 and 112:
of the official and self-reported h
Page 113 and 114:
Salekin, R. T., Rogers, R., & Sewel
Page 115 and 116:
Stockdale, K. C., Olver, M. E., Won
Page 117 and 118:
Vitale, J. E., & Newman, J. P. (200
Page 119 and 120:
Xie, H., Cairns, R. B., & Cairns, B
Page 121 and 122:
Appendix B: Factor Models Table A1
Page 123 and 124:
112
Page 125 and 126:
Appendix E: Coding Scheme and Guide
Page 127 and 128:
PART A: OFFENCE CHARACTERISTICS AND
Page 129 and 130:
PART C: WOODWORTH & PORTER`S INSTRU
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