The Maudsley Personality Inventory (MPI) was administered individually to 18 adolescent offenders diagnosed clinically as schizoid personalities and to their matched controls. It was predicted and verified that schizoid offenders would score lower on Extraversion (E). An analysis of E items suggests that the lower E scores can be attributed to responses indicating avoidance of social interaction. An examination of the nature of the offence shows that schizoids tend to commit sexual offences while offender and victim are alone, whereas the controls tend to commit property offences while in a group of two or more.
References
1.
BartholomewA. A. (1959). Extraversion-introversion and neuroticism in first offenders and recidivists. Brit. J. Delinq., 10: 120.
2.
BartholomewA. A. (1963). Some comparative Australian data for the Maudsley Personality Inventory. Aust. J. Psychol., 15: 46.
3.
BlockJ. (1965). The Challenge of Response Sets: Unconfounding Meaning, Acquiescence, and Social Desirability in the MMPI. Appleton-Century-Crofts, New York.
4.
CattellR. B. (1965). The Scientific Analysis of personality. Penguin Books, London.
5.
EysenckH. J. (1959). Manual of the Maudsley Personality Inventory. University of London Press, London.
6.
EysenckH. J. (1967). The Biological Basis of Personality. Thomas, Springfield, Illinois.
7.
EysenckS. B. G. (1965). Manual of the Junior Eysenck Personality Inventory. University of of London Press, London.
8.
EysenckS. B. G.EysenckH. J. (1963). On the dual nature of extraversion. Brit. J. soc. clin. Psychol., 2: 46.
9.
FairbairnW. R. D. (1941). A revised psychopathology of the psychoses and psychoneuroses. Int. J. Psychoanal., 22: 250.
10.
FairbairnW. R. D. (1944). Endopsychic structure considered in the light of object-relationships. Int. J. Psychoanal., 25: 70.
11.
FairbairnW. R. D. (1952). Psychoanalytic Studies of the Personality. Tavistock Publications, London.
12.
FitchJ. H. (1962). Two personality variables and their distribution in a criminal population: an empirical study. Brit J. soc. clin. Psychol., 1: 161.
13.
Group for the Advancement of Psychiatry, (1966). Report No. 62: Psychopathological Disorders in Childhood: Theoretical Considerations and a Proposed Classification. G.A.P. Publications, New York.
14.
GuntripH. (1952). A study of Fairbairn's theory of schizoid reactions. Brit. J. med. Psychol., 25: 86.
15.
GuntripH. (1961a). Personality Structure and Human Interaction. Hogarth, London.
16.
GuntripH. (1961b) The schizoid problem, regression, and the struggle to preserve an ego. Brit. J. Psychol.34: 223.
17.
JacobsT.TeicherJ. D. (1967). Broken homes and social isolation in attempted suicides of adolescents. Int. J. soc. Psychiat., 13: 139.
18.
JenkinsR. L.GlickmanS. (1946). Common syndromes in child psychiatry. I. Deviant behaviour traits. II. The schizoid child: a statistical analysis. Amer J. Orthopsychiat., 16: 244.
19.
KassebaumG. E.CouchA. S.SlaterP. E. (1959). The factorial dimensions of the MMPI. J. consult. Psychol., 23: 226.
20.
KretschmerE. (1952). Physique and Character. An Investigation of the Nature of Constitution and of the Theory of Temperament. Translated from 2nd Edition by SprottW. J. H.. Kegan Paul, London.
21.
LaingR. D. (1965). The Divided Self. An Existential Study in Sanity and Madness. Penguin Books, London.
22.
LittleA. (1963). Professor Eysenck's theory of crime: an empirical test on adolescent offenders. Brit. J. Criminol., 4: 152.
23.
MegargeeE. I. (1966). Undercontrolled and over-controlled personality types in extreme antisocial aggression. Psychol. Monogr., Vol. 80, No. 3 (Whole No. 611).
24.
SiegelS. (1956). Nonparametric Statistics for the Behaviour Sciences. McGraw-Hill, New York.
