The inheritance of extraversion-introversion

doi:10.1016/0001-6918(56)90010-5

Acta Psychologica

Volume 12, 1956, Pages 95-110

https://doi.org/10.1016/0001-6918(56)90010-5 Get rights and content

Abstract

In this study an effort has been made to provide evidence for the existence of a factor of extraversion-introversion among children, similar to that found among adults, and to measure this factor. By and large, this attempt has been successful and the factorial analysis reported in this paper gives clear evidence of a strong factor of extraversion-introversion.

It was hypothesized that the concept of extraversion-introversion, as operationally defined in the writer's previous work, would be closely parallel to Rorschach's concept of extratensive-introvertive personality. The inclusion of a number of R scores in the factor analysis made it possible to test this hypothesis, and the results on the whole favoured acceptance of this theory.

Two further factors were isolated in the analysis, namely, one of intelligence and one of autonomic activity. These additional factors were found to be independent of each other and also to be independent of extraversion-introversion. Factor scores were calculated for all three factors for the members of the experimental populations.

As the major aim of the investigation was to study the effects of heredity on extraversion-introversion, the subjects of the investigation were 13 pairs of male identical twins, 13 pairs of female identical twins, 13 pairs of male fraternal twins and 13 pairs of female fraternal twins. By using standard methods of intra-class correlation for different types of twins, it was shown that all three factors, identical twins resembled each other significantly more closely than did fraternal twins. This was regarded as proof that heredity played an important part in the determination of intelligence, extraversion, and autonomic reactivity.

References (23)

Barron, F., An attempt to study the human movement response by constructing a measure of M-threshold. To...
D.B. Blewett
An experimental study of the inheritance of neuroticism and intelligence
D.B. Blewett
An experimental study of the inheritance of intelligence
J. ment. Sci.
(1954)
S.M. Cox
A factorial study of the Rorschach responses of normal and maladjusted boys
J. genet. Psychol.
(1951)
H.J. Eysenck
Dimensions of personality
(1947)
H.J. Eysenck
The scientific study of personality
(1952)
H.J. Eysenck
La rapidité du fonctionnement mental comme mesure de l'anomalie mentale
Rev. Psychol. Appl.
(1953)
H.J. Eysenck
The structure of human personality
(1953)
H.J. Eysenck
The psychology of politics
(1954)
H.J. Eysenck
A dynamic theory of anxiety and hysteria
J. ment. Sci.
(1955)

H.J. Eysenck et al.

The inheritance of neuroticism: an experimental study

J. ment. Sci.

(1951)

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The inheritance of extraversion-introversion

Abstract

An experimental study of the inheritance of neuroticism and intelligence

An experimental study of the inheritance of intelligence

J. ment. Sci.

A factorial study of the Rorschach responses of normal and maladjusted boys

J. genet. Psychol.

Dimensions of personality

The scientific study of personality

La rapidité du fonctionnement mental comme mesure de l'anomalie mentale

Rev. Psychol. Appl.

The structure of human personality

The psychology of politics

A dynamic theory of anxiety and hysteria

J. ment. Sci.

The inheritance of neuroticism: an experimental study

J. ment. Sci.