Birth Order,Sex of Subject and Sex of Sibling as Factors in Extraversion and Neuroticism in Two-Child Families

Abstract

Using the Eysenck Personality Inventory, Extraversion and Neuroticism scores were obtained for 120 college students from two-child families. When the effects of birth order and sex of S were examined, a significant interaction occurred for Extraversion, with firstborn males and second-born females reporting higher scores. Higher Neuroticism scores occurred for Ss with opposite-sexed siblings than for those with the same-sexed sibling. Results suggest that Extraversion and Neuroticism are influenced by position in the two-child family.

References

Adler

The education of children. Chicago: Gateway, 1970.

Barthell

C. N.

Affiliation, birth order, and extraversion-introversion. Dissertation Abstracts International, 1971, 31–7B, 4324–4325.

Eysenck

Manual for the Eysenck Personality Inventory. San Diego: Educational & Industrial Testing Service, 1968.

Hall

E. D.

Barger

Attitudinal structures of older and younger siblings. Journal of Individual Psychology, 1964, 20, 59–68.

Koch

H. L.

Some personality correlates of sex, sibling position, sex of sibling among five- and six-year-olds. Genetic Psychology Monographs, 1955, 52, 3–50.

Lessing

Oberlander

Birth order and personality adjustment as evaluated by the California Test of Personality and the IPAT Children's Personality Questionnaire. Psychological Reports, 1972, 31, 23–27.