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Summary Of Birth Order Theory

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This study was conducted to support Alfred Alder’s birth order theory in regards to personality characteristics. The hypothesis that first born children are more responsible, successful, and obedient than their younger siblings, while last born children are more manipulative, outgoing and rebellious were supported by these results. These findings are similar to Paulhus, Trapnell, & Chen (1999) study, results of the study indicated firstborns were nominated by their siblings as most conscientious as well as most achieving and later born children were more frequently nominated as most liberal, agreeable, and rebellious. Another study supporting the hypothesis is a study conducted by Zweigenhaft and Von Ammon (2000). In the study it was hypothesized that later born children were more rebellious then firstborns. To do this they examined the birth order of a group of U.S. college students who had been arrested for engaging in civil disobedience in a labor dispute. Later born children were more likely than firstborns to have been arrested. This provides evidence that later born children are more likely than firstborns to be rebellious. …show more content…

This can be a result of not having enough sample items for middle born characteristics on the survey that distinguished them from the last born characteristics. Also, when calculating the Cronbach alpha score for middle born traits, the level of internal consistency was under the recommend score. The score could have been improved if the Cronbach alpha sample item “peacemaker” was deleted from the survey. An additional problem with the study, in regards with the sample size. It was not large enough to be considered a representative of the population. Also, the participants gender was uneven, thirteen male students and twenty-seven female students. This is considered to be to be bias to the the female

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