Growing up with multiple siblings might negatively affect language development. This study examined the associations between birth order, sibling characteristics and parent-reported vocabulary size in 6163 Norwegian 8- to 36-month-old children (51.4% female). Results confirmed that birth order was negatively associated with vocabulary, yet…

Background: Nocturnal Enuresis (NE) is one of the most prevalent childhood disorders and has significant negative psychosocial impact on the child and family. Objective: To assess the characteristics of children with NE and trends over a 15-year period. Methods: The study included 18,677 children [11,205 (60%) boys and 7,472 (40%) girls] referred…

We exploit the 1986, 1994, and 2001 waves of the Canadian general social surveys in order to estimate intergenerational correlations in education. The use of these specific data is important because of available information on the final educational attainment of survey respondents and both parents, as well as family size and birth order. OLS…

The relation between intelligence and birth order was shown in a recent publication [Bjerkedal, T., Kristensen, P., Skjeret, G. A. & Brevik, J. I. (2007). Intelligence test scores and birth order among young Norwegian men (conscripts) analyzed within and between families. "Intelligence," 35, 503-514] to be negative. Subjects in this…

The present paper reports the results of a within and between family analysis of the relation between birth order and intelligence. The material comprises more than a quarter of a million test scores for intellectual performance of Norwegian male conscripts recorded during 1984-2004. Conscripts, mostly 18-19 years of age, were born to women for…

Examined the relationship between reading achievement and birth order in 503 Greek children. Found that birth order was not related to vocabulary knowledge or reading comprehension at second grade, but total reading achievement and reading comprehension were higher for first- and second-born sixth graders than for later-born sixth graders. (KB)

This study examined the relationship between age-interval between siblings and children's creative abilities, as well as parental views on the creative abilities of 116 children (ages 9-12 years). The study found that larger age intervals resulted in greater creativity and that age intervals also interacted with birth order, family size, and age.…

Literature on the relationship between sibling structure and academic abilities and achievement since 1978 is reviewed. As the findings generally refute the confluence model of the influence of sibling structure, alternative interpretations are presented with implications for further research. (Author/BS)

Explores the relationship between numbers and sexes of siblings and perceived rearing practices. Uses the Parental Bonding Instrument to rate responses of 1,145 pregnant Japanese women. Determines participants with more older sisters felt their parents were less caring; participants with more brothers, specifically younger, saw their parents as…

Assessed delinquent and nondelinquent male adolescents (N=43) on locus of control and intellectual achievement responsibilty. Results supported a multidimensional model. There was no difference in expectancy of control for negative academic events between delinquents and nondelinquents. Birth order and delinquency were the most important…