This article presents a technique that will help teachers, researchers, and other people who use the linear regression models, especially those in education and social sciences, to understand and interpret the residuals graphics better.

In order to estimate the likely effects on item difficulty when a calculator becomes available on the quantitative section of the Graduate Record Examinations® (GRE®-Q), 168 items (in six 28-item forms) were administered either with or without access to an on-screen four-function calculator. The forms were administered as a special research…

This brief presents the results of a study which found that a developmental mathematics program at a four-year institution is an effective mechanism for retaining students (Lesik, 2007). This study employed a regression-discontinuity model that researchers can use to establish a causal link between participation in a developmental program and…

We examined the possibility that teams composed primarily of individuals with personality characteristics conducive to team creativity (e.g., high extraversion, high openness to experience, low conscientiousness, high neuroticism, low agreeableness) would show synergistic increases in creativity when they experienced high levels of "team creative…

The aim of the study was to investigate the relationships between situational and contextual self-determined motivation and physical activity intensity as measured by heart rates during a ninth-grade students' physical education (PE) class. The participants of the study were 139 Finnish ninth-grade students (15-year-olds). The data were collected…

The education, recruitment, training, and retention of a quality child welfare workforce is critical to the successful implementation of public policy and programs for the nation's most vulnerable children. Yet, national information about child welfare workers has never been collected. The National Survey of Child and Adolescent Well-Being is a…

This study has been carried out to develop a tool to measure the level of anxiety of students studying in the 10th and 11th grades of high schools in Turkey. The scale has been created by the application of a pool of items consisting of 45 sentences based on student opinions and expert advice to 365 students and the branching of the results with…

This study examined the influence of socioeconomic (age, education, marital status, income, and health) and demographic variables and the quantity and quality of relationships with adult children, grandchildren, siblings and friends on life satisfaction of the elderly. Participants were 200 persons older than 60 years of age. Hierarchical…

The authors discuss a new method that combines the randomized response technique with item response theory. This method allows the researcher to obtain information at the individual person level without knowing the true responses. With this new method, it is possible to compare groups of individuals by means of analysis of variance or regression…

Recent research shows that, as students interpret the demands of the assessment tasks, they vary their approaches to learning in order to cope with the assessment tasks. Three research questions are central in the present paper: (1) Do students who participate in a constructivist learning environment change their perception of assessment demands…

Distance education plays an important role in broadening educational access and increasing higher educational opportunities. The success, however, for any distance education initiative relies on a critical and core resource, namely having participating faculty who provide quality instruction. This study uses survey design and diffusion of…

Objective: To examine the mediational significance of posttraumatic stress disorder (PTSD) and the development of eating disorder symptomatology following sexually traumatic experiences. Method: Seventy-one victims of sexual trauma and 25 control subjects completed interviews and questionnaires assessing eating disorder psychopathology and…

Our aim is to identify predictors of first-time ecstasy use in a prospective study among young people at risk. As part of the multidisciplinary Netherlands XTC Toxicity Study (NeXT), we monitored 188 subjects aged up to 18 years who were ecstasy-naive at baseline but seemed likely to start taking ecstasy in the near future. After an 11- to…

The primary purpose of this study is to determine whether different types of supervision problems such as leaving a child alone and leaving a child with an inadequate caregiver have different correlates and consequences for children. A case-comparison design was used to compare four types of supervision problems. Data were extracted from child…

Teacher practices are essential for supporting students in scientific inquiry practices, such as the construction of scientific explanations. In this study, we examine what instructional practices teachers engage in when they introduce scientific explanation and whether these practices influence students' ability to construct scientific…