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This study investigated the relationship between maladaptive behavior, defined as referral to counseling, and the Adlerian construct of birth order. The birth order variables examined were ordinal position, sex of subject, family density, family size, socio-economic status, intactness of family, age of mother, and sex of sibling. The subjects in this study were 217 school-aged children with academic and/or behavior problems who were referred to an interdisciplinary guidance center. The subjects were assigned to counseling or no-counseling groups on the basis of an interdisciplinary evaluation and staffing, which included an extensive battery of academic and psychological tests.

The present study was concerned with investigating children's generalized locus of control of reinforcement and its possible relationship to the demographic variables of birth order and family size. The sample consisted of 93 school children in Grades 6, 7, and 8. The analysis of data was by a 2 x 3 factorial design. Results indicated no significant differences in the generalized locus of control orientations of first-born, intermediate-born, and youngest children. Results also indicated that children of these different birth order positions from small families and from large families did not differ significantly in their generalized locus of control orientation. A correlational study of the data showed that the children's locus of control orientations were unrelated to sex differences.

The aim of this study was to establish whether a relation between confidence in judgments and decisions is affected when individuals are made aware of their birth order position. Students from The University of Arizona were recruited and asked to give upper- and lower-bound ranges for a guess before and after a subtle birth order reminder. Participants also completed The General Decision Making Style questionnaire to determine whether any style correlated with birth order position. It was discovered that no statistically significant relationship was found between reminder of birth order position and confidence in decisions made. The General Decision Making Style Questionnaire indicated a significant relationship between age and the intuitive style.

Birth-order and sibling differences in the subjective perception of personality traits were studied in 170 children and adults. Based on Adlerian psychology theory, it was hypothesized that siblings see themselves as different on various personality traits, that the psychological position a child identifies with does not always correspond with birth-order, and that perceived traits are more closely related to psychological position than to birth-order. The 170 subjects studied included 30 families with either three boys or three girls and 40 families with either two boys or two girls. All were between the ages of 11 and 25. Additional variables explored in this study were sex of child, socioeconomic level of family, and family size. A semantic differential scale and a modification of an Adlerian family constellation form were used to examine the differences among siblings in their perception of traits and their association with both birth-order and psychological position. A subsample was retested after two weeks. Repeated scores occurred within (+OR-) one unit 73 to 80% of the time. The majority of children studied felt different from their siblings and in most cases identified from 10% to 30% of the traits where differences were perceived as large. As hypothesized, psychological position was not always the same as birth-order especially for second and third children. Of the 30 middle children, 15 felt squeezed, 6 felt like psychological eldest and 3 felt like strivers. For third-born children, 14 felt like youngest, and 10 felt like they had gone ahead of the second child. Most of the first-born children (80%) were also psychologically first. Significant differences among psychological positions and perceived traits were found among sibling comparisons. Socioeconomic level and sex were found to influence the relation of birth-order and psychological position to self and sibling perception on various traits, but only to a limited extent.

Having a child with autism not only has devastating consequences for the individual child, but it also profoundly influences the entire family, including siblings. Researchers have explored the impact of having an ASD sibling on the typically-developing brother/sister; these studies have yielded inconsistent results, with some children benefitting from the experience while others encounter negative outcomes. The present study examined the role of birth order on ASD children’s typically-developing siblings’ outcome. It was predicted that typically-developing siblings born prior to their ASD sibling would have fewer behavioral difficulties and would do better academically compared to typically-developing siblings born after their ASD sibling. Typically-developing siblings born after their ASD sibling, by contrast, were expected to have more behavioral difficulties and do more poorly in school. Results demonstrated that none of the Strengths and Difficulties Questionnaire subscales approached statistical or practical significance in siblings who were younger vs. older than their ASD child. However, compared to a normative sample, typically-developing siblings of the ASD children were found to score significantly higher on all the SDQ measures including total difficulties. In addition, it was found that the more years separating the ASD sibling from the typically-developing sibling, the more conduct problems the typically-developing sibling displayed. These findings suggest that typically-developing siblings may benefit from some kind of intervention. For example, creating in-home interventions or services that target typically-developing siblings which may include helping them find positive ways to interact with their ASD sibling, may provide some extra support for these children.

Broad societal and cultural changes since the 1970s have provided incentives for young people to postpone parenthood. The greater access to and longer pursuit of higher education, the greater involvement of women in the labour market, and changes in family behaviour have contributed to a long-term increase in age at parenthood. The spread of effective contraception and wider access to abortion have also played a part, helping women and couples better plan the timing of births. Using data from the Human Fertility Database, we document a rise in fertility rates among women aged 40 and older in low-fertility countries of Europe, East Asia, North America, and Australia.

<p>En majoritet bland ledare i olika organisationer har en bakgrund som storasyskon eller ensambarn (Hudson, 1990). Denna studie genomfördes för att få svar på om personer med ledaransvar skiljer sig åt gällande syskonplats och locus of control jämfört med de personer som inte har ledaransvar. Ledare och medarbetare på en statlig myndighet svarade på en enkät gällande plats i syskonskara, erfarenhet av ledarskap och locus of control. Resultatet visade att sistfödda i detta urval hade en högre grad av intern locus of control än förstfödda vilket kan tyda på en annan typ av sistfödd på denna myndighet. Urvalet var dock bristfälligt (N = 48) och slutsats kunde inte dras utan att riskera ett felaktigt resultat.</p>

En majoritet bland ledare i olika organisationer har en bakgrund som storasyskon eller ensambarn (Hudson, 1990). Denna studie genomfördes för att få svar på om personer med ledaransvar skiljer sig åt gällande syskonplats och locus of control jämfört med de personer som inte har ledaransvar. Ledare och medarbetare på en statlig myndighet svarade på en enkät gällande plats i syskonskara, erfarenhet av ledarskap och locus of control. Resultatet visade att sistfödda i detta urval hade en högre grad av intern locus of control än förstfödda vilket kan tyda på en annan typ av sistfödd på denna myndighet. Urvalet var dock bristfälligt (N = 48) och slutsats kunde inte dras utan att riskera ett felaktigt resultat.