We measured small intestinal permeability using a lactulose:mannitol sugar permeability test in a group of children with autism, with current or previous gastrointestinal complaints. Secondly, we examined whether children with autism had an abnormal glucagon-like peptide-2 (GLP-2) response to feeding. Results were compared with sibling controls…

Using data from 4,744 full, twin, half-, adopted, and stepsiblings in the Wisconsin Longitudinal Study, I examine psychological consequences of motherhood and fatherhood in midlife. My analysis includes between-family models that compare individuals across families and within-family models comparing siblings from the same family to account for…

The growing literature on sibling relationships throughout their lifespans is of great importance to those working in the child welfare system, and in adoption services in particular. Sibling bonds are important to all of us, but they are particularly vital to children from disorganized or dysfunctional families. These relationships assume even…

This dissertation focuses on the educational aspirations and expectations of a heterogeneous group of women who were enrolled in, or had graduated from, adult education and literacy programs in Boston, Massachusetts. The research questions guiding the inquiry are: (1) Why do educationally disadvantaged women value education--how are these values…

Using the National Education Longitudinal Study, this study explored various factors that predicted bachelor's degree attainment among rural youth attending a four-year institution. Results showed that Hispanic origin, family income, parental educational expectations, the rigor of the high school curriculum, timing and intensity of college…

Objective: The current study tests electroencephalogram (EEG) measures as a potential endophenotype for attention deficit/hyperactivity disorder (ADHD) by examining sibling and parent-offspring similarity, familial clustering with the disorder, and association with the dopamine receptor D4 (DRD4) candidate gene. Method: The sample consists of 531…

In this study, the author focuses on how Cowessess First Nation band members have constructed their identities over time, and the link between their identities and notions of kinship. Specifically, the author examines how Cowessess band members' continued adherence to principles of traditional law regulating kinship has undermined the imposition…

Parent-offspring conflict theory (POCT) has been underutilized in studies of human family dynamics. An implication of POCT is that the presence of siblings will increase conflict in biological parent-child dyads, and that half siblings will increase that conflict more than full siblings. Evidence consistent with this prediction was found in a…

Previous models of parental educational investments focus on the composition of the sibship (number, gender, ordering, and spacing) and on the social and institutional context in which investment decisions are made. Social-institutional models predict that parents in Japan are likely to underinvest in girls because of their transient status in the…

Family characteristics' links to literacy learning and their differences across macrosystems (economic and cultural contexts) were explored in multilevel analyses of the reading tests and questionnaire responses of 193,841 fifteen-year-olds across 41 countries. Students who had two parents, had higher family socioeconomic status (SES), were native…

Forty-five parents of children with autism, cerebral palsy, Down syndrome, and sickle cell disease participated in 8 focus groups. Parents discussed how they, the child with the disability, and the siblings addressed community perceptions about the child's disability. Themes evolving from the interviews included (a) support and lack of support,…

Parents providing long-term care for their children with impairments face myriad physical and emotional challenges. Researchers have examined coping strategies among parent caregivers in various contexts internationally. However, little research has focused on caregiving mothers of children with impairments in developing countries, and even less…

Aim: The aim of this study was to determine neuropsychological performance (possibly predictive of academic difficulties) and its relationship with cognitive development and maternal education in healthy preterm children of preschool age and age-matched comparison children born at term. Method : A total of 35 infants who were born at less than 33…

Objective: Negative priming (NP) is the slowed response to a stimulus that was previously ignored. Response times in NP task conditions were compared with the interference provided by congruent/incongruent stimuli in a Stroop condition in the same task in children diagnosed with attention-deficit hyperactivity disorder (ADHD), their unaffected…

This paper uses Norwegian data to estimate the effect of family size on IQ scores of men. Instrumental variables (IV) estimates using sex composition as an instrument show no significant negative effect of family size; however, IV estimates using twins imply that family size has a negative effect on IQ scores. Our results suggest that the effect…