The problem with which this investigation was concerned was to determine whether or not age difference was related to aggressiveness scores of first-born children.

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 214-218). Available also in a digital version from Dissertation Abstracts.

Thesis (M.S.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--University of Texas at Austin, 2000. / Vita. Includes bibliographical references (leaves 158-176). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Alabama at Birmingham, 2009. / Title from PDF title page (viewed Sept. 1, 2009). Additional advisors: Lois Christensen, Kay Emfinger, Grace Jepkemboi, Deborah Strevy. Includes bibliographical references (p. 98-102).

Birth order may represent one of the most influential environmental factors that directly impacts personality development and even life outcomes. The present study sought to expand upon the existing literature by examining the motivational and dispositional differences between first born and second born individuals. Research indicates that first born children show significantly higher levels of academic achievement and lifelong attainment due to experiencing higher parental expectations as well as increased financial support. As a result, the second born child is likely to compare him/herself with the first born sibling and develop a greater level of competitiveness. Additionally, this desire to surpass the first born may lead to the development of extrinsically motivated goals. Few research endeavors to date have explored the specific motivational disposition of the second born child with no future siblings. By engaging in this research, a better understanding of the complex interaction between siblings can be ascertained as well as a deeper appreciation for how the familial environment impacts development. Such information can be applied to the educational setting to develop programs more rewarding and salient to second-born individuals, thus increasing their level of academic achievement. Seventy-two male and female participants took part in the present experiment. Research validated scales were used to assess overall competitiveness in addition to intrinsic and extrinsic motivation. A paired-t test was used to evaluate the data and compare the differences between the two groups. Although the results do not support the hypotheses, there were a number of limitations that may have served to restrict the scope of the data. The theoretical implications of the results and suggestions for future research will be discussed.

No description available.

No description available.

This study investigated firstborns' adjustment and responsiveness to a new sibling and parents' responsiveness to their firstborn before and after the second child's birth. Parental responsiveness was also examined in the context of predicting firstborns' adjustment and responsiveness to the sibling. Fifty families with firstborn daughters (26-55 mo) were visited at home 6-10 weeks before and 5-6 weeks after the sibling's birth. After the sibling's birth, young firstborns were more distressed than old firstborns; however, prenatal distress was the best predictor of postnatal distress. Old and young firstborns showed different patterns of responsiveness to brothers and sisters. In terms of parental responsiveness, firstborns perceived mothers as more responsive after the birth than before, while their perceptions of fathers remained unchanged. Mothers gave less support after the birth, particularly to old firstborns. Although fathers' support remained unchanged postnatally, fathers gave the least support to old firstborns with brothers. Time spent by mothers with firstborns decreased from before to after the birth, while fathers' time increased. Continuity was found for parental support but not for parental involvement, especially by fathers. Parental support was associated with low postnatal distress while parental caregiving was related to high postnatal distress. Prenatal maternal responsiveness and postnatal paternal responsiveness predicted postnatal distress. Firstborns' perceptions of parental responsiveness were generally associated with firstborns' responsiveness to the sibling. The results were discussed in terms of family-systems theory and stress-coping theory.

No description available.