Intraclass correlation and Cronbach's alpha are widely used to describe reliability of tests and measurements. Even with Gaussian data, exact distributions are known only for compound symmetric covariance (equal variances and equal correlations). Recently, large sample Gaussian approximations were derived for the distribution functions. New exact…

Research suggests component skill performance has a strong positive relationship with composite skill performance. This study examined the association between accuracy and fluency for the component-composite relationship within multiplication. One hundred and fifty-seven fifth-graders did one-minute assessments for single-digit, and multi-digit…

A simulation study was conducted to examine the effect of item parceling on confirmatory factor analysis parameter estimates and their standard errors at different levels of sample size, number of indicators per factor, size of factor structure/pattern coefficients, magnitude of interfactor correlations, and variations in item-level data…

Individual plans for people with intellectual disabilities were evaluated for quality and effectiveness in improving quality of life. Quality was assessed by rating whether goals were relevant, observable, age appropriate, necessary, timetabled, developmental, measurable, realistic, assigned to staff and improving at least one of O'Brien's five…

Efficiency scores are determined for Canadian universities using both data envelopment analysis and stochastic frontier methods for selected specifications. The outcomes are compared. There is considerable divergence in the efficiency scores and their rankings among methods and specifications. An analysis of rankings, however, reveals that the…

We examined the association of adolescent obesity with participation in sports among 5489 low-income, inner city public high school students. Among inner city youth 28.5% of males and 33.7% of females were overweight and 15.9% of boys and 16.4% of girls were obese. For both males and females, participation in an increasing number of athletic…

A large number (N 50 569) of 14-16 year old Finnish adolescents taking part in the School Health Promotion Study were surveyed for delinquent behaviour in relation to depression. The results indicate a robust association between delinquency and depression. Among girls risk for depression varied between 1.3 and 3.1 according to various antisocial…

The current study examined attachment style, strengths, and difficulties in institutionalized and non-institutionalized children with below-average intellectual abilities. Parents/caregivers and teachers of the children completed a brief measure of attachment style and the Strengths and Difficulties Questionnaire, which assesses the most important…

Objective: This study examined the relationship between ego development and psychological defenses to aggressive behavior in a group of psychiatrically hospitalized adolescents. Method: Subjects were 245 adolescents ages 12-16, who were assessed for aggressive behaviors, assaultive incidents, ego development and defenses. Results: Aggressive…

Background: Life events have consistently been found to be associated with behaviour problems and depression among individuals with intellectual disability (ID). However, prior findings have typically been based on correlational or retrospective analyses of case files. The current study attempted to replicate prior findings from life events with…

This article applies theoretical ideas in the literature on the household division of labor to the analysis of partners' political preferences. We regress men's and women's political party preferences on their own and their partners' characteristics using data from the 1991 British Household Panel Survey (N = 2,846). We find a symmetrical pattern…

This study investigated reciprocity in parent-adolescent interactions among 102 families from lower or higher socioeconomic status (SES) backgrounds. Negative behaviors between parents and adolescents were more reciprocal (strongly correlated) in higher SES than lower SES families, and this reciprocity correlated with higher family relationship…

We propose that stronger than usual correlations between abilities indicate which cognitive processes are impaired in autism. Study 1 compared partial correlations (controlling age) between intelligence and social cognition in children with autism (n = 18), mental retardation (MR; n = 34), or no psychological disorder (n = 37). Correlations were…

The effectiveness of the Tabu variable selection algorithm, to identify predictor variables related to a criterion variable, is compared with the stepwise variable selection method and the all possible regression approach. Considering results obtained from previous research, Tabu is more successful in identifying relevant variables than the…

The purpose of this work is to identify process measures of student interaction with a course management system (CMS). Logs maintained by Web servers capture aggregate user interactions with a Website. When combined with a login system and context from the course recorded in the CMS, more detailed measures of individual student interaction can be…