Outliers in assessments are often treated as a nuisance for data analysis; however, they can also assist in quality assurance. Their frequency can suggest problems with form codes, scanning accuracy, ability of examinees to enter responses as they intend, or exposure of items.

A simple method for studying the kinetics of a chemical reaction is described and the significance of reaction orders in deducing reaction mechanisms is demonstrated. In this student laboratory experiment, oxidation of iodide by iron(III) ions in an acidic medium is transformed into a clock reaction. By means of the initial rates method, it is…

Purpose: This study characterized the development of speech sound production in prelingually deaf children with a minimum of 8 years of cochlear implant (CI) experience. Method: Twenty-seven pediatric CI recipients' spontaneous speech samples from annual evaluation sessions were phonemically transcribed. Accuracy for these speech samples was…

The average rate of change is a concept that has been misunderstood in the literature. This article attempts to clarify the concept and show unequivocally the mathematical definition and meaning of the average rate of change in longitudinal models. The slope from the straight-line change model has at times been interpreted as if it were always the…

Government agencies typically apply a general value of statistical life (VSL) estimate when performing cost-benefit analysis (CBA). However, theory suggests that college students attach a value to statistical lives that differs from society's VSL; therefore, CBA may lead to inefficient levels of risk reduction among students. A contingent…

Methods of sample size planning are developed from the accuracy in parameter approach in the multiple regression context in order to obtain a sufficiently narrow confidence interval for the population squared multiple correlation coefficient when regressors are random. Approximate and exact methods are developed that provide necessary sample size…

This study examines the range-of-affect hypothesis in a within-subject context using the weighting situation faced in quality of life (QOL) measurement. Data collected in Wu and Yao's (2006b) study were used (332 undergraduates at National Taiwan University). The mean age was 19.80 years (std = 1.98). They completed a QOL questionnaire and…

The purpose of the present study was to investigate the L2 use rate in EFL classrooms through introducing three task conditions in learning lexical items. Data were collected from a group of freshman university students (male and female) studying in Islamic Azad university of Sabzevar, Iran (N = 73). Based on their performance on a Michigan TOEFL…

During the past decade Georgia has received strong international support for education reform, and it represents an interesting case by which the effectiveness of particular interventions in the region can be assessed. Most attempts to analyse progress within the system have so far been concentrated on two aspects of formal education: private and…

The frequent use of student self-report surveys in higher education calls into question the possibility of social desirability having an unwanted influence on responses. This research explores the potential presence of social desirability bias with the National Survey of Student Engagement (NSSE), a widely used assessment of student behaviors.…

Background/Context: Educational policy makers have begun to recognize the challenges posed by teacher turnover. Schools and students pay a price when new teachers leave the profession after only 2 or 3 years, just when they have acquired valuable teaching experience. Persistent turnover also disrupts efforts to build a strong organizational…

In response to the increasing cost of college, colleges and universities are leveraging financial aid and academic support services to implement access and success programs intended to help financially disadvantaged students afford and persist through a baccalaureate degree program. This research is a study of the efficacy of one such program at a…

It is well-documented that students' prior knowledge, cultural background, and language proficiency play a role in how they read, interpret, and respond to writing tasks (Barkaoui, 2007; Connor & Kramer, 1995; Hinkel, 2002). Essays written by students from different language backgrounds often differ in their linguistic, stylistic, and…

Purpose: Online programs rely on the use of educational technology for knowledge sharing in academic virtual communities of practice (vCoPs). This poses the question as to which factors influence technology acceptance. Previous research has investigated the inter-relationship between educational technology acceptance (ETA) and the vCoP context…

Electronic learning (e-learning) portals can be defined as websites that store and present materials for online learning, training, performance assessment, and certification. Few, if any, studies have investigated the factors that might contribute to the integration or implementation of e-learning portals in universities. With the development of…