In this article, the author believes that a visual image of the number system is helpful to everyone, especially children, in understanding what is, after all, an abstract idea. The simplest model is the number line, a row of equally spaced numbers, starting at zero. This illustrates the continuous progression of the natural numbers, moving to the…

The status of English as a lingua franca (ELF) has become an increasingly popular discourse in Applied Linguistics and current ELT. It has been suggested that native speakers and their Englishes have become relatively unimportant in international communication and that research interests should now fall on non-native speakers and their use of…

An urban school district was able to improve its students' reading achievement substantially by implementing a variety of literary coaching models. The six literary coaching process strategies used by schools are discussed.

Although some of the literature on teaching qualitative research methods courses has included students' experiences during courses, these experiences have not been made a primary focus of study and examined systematically. To gain a fuller understanding of students' experiences during a graduate-level qualitative methods course, 13 reflective…

In this paper a model is offered that allows for the construction of a theoretical explanation on the basis of data accumulated in the field for the purpose of constructing a meaningful description. In this endeavour a distinction is proposed between two methods of theoretical analysis: first-order analysis and second-order analysis. First-order…

Letters and words are better identified when there are fewer available choices. How do readers use choice-set restrictions? By analyzing new experimental data and previously reported data, the author shows that Bayes theorem-based models overestimate readers' use of choice-set restrictions. This result is discordant with choice-similarity models…

Describes a developmental model for providing technical assistance and teacher training. Highlights how model builds a trusting relationship with the teacher; shapes effective practices; provides conceptual labels and explains reasons for effective practices; generalizes effective practices to other parts of the program; and facilitates dialogue…

In Part I of this paper, we described a model that was used as a framework for reviewing studies of psychoeducational interventions intended to influence illness- and treatment-related behaviors and attitudes in pediatric cancer patients. In Part II, we distinguish between interventions that attempt to influence patients' behaviors just by…

This study examined the stability of the 7-item Social Physique Anxiety Scale (SPAS-7) using a test-retest method. Collegiate, undergraduate (N = 201) students completed two administrations of the SPAS-7, with a 14-day separation between the administrations. The scale was administered either at the beginning or end of the physical activity class.…

The effectiveness of children's services is often limited by a series of problems that also impede meaningful evaluation. This article describes and assesses research strategies to enhance the evaluability of a programme for disaffected young people, arguing that they have the potential to improve services more widely. It explores methods for…

Unlike their monotone counterparts, nonparametric unfolding response models, which assume the item response function is unimodal, have seen little attention in the psychometric literature. This paper studies the nonparametric behavior of unfolding models by building on the work of Post (1992). The paper provides rigorous justification for a class…

The implications of history and philosophy of chemistry are explored in the context of chemical models. Models and modeling provide the context through which epistemological aspects of chemistry can be promoted. In this work, the development of ideas and models about acids and bases (with emphasis on the Arrhenius, the Bronsted-Lowry, and the…

The regression trunk approach (RTA) is an integration of regression trees and multiple linear regression analysis. In this paper RTA is used to discover treatment covariate interactions, in the regression of one continuous variable on a treatment variable with "multiple" covariates. The performance of RTA is compared to the classical…

The sampling distributions of five popular measures of association with and without two bias adjusting methods were examined for the single factor fixed-effects multivariate analysis of variance model. The number of groups, sample sizes, number of outcomes, and the strength of association were manipulated. The results indicate that all five…

Objective: Children involved in motor vehicle crash (MVC) events might experience angular accelerations similar to those experienced by children with inflicted traumatic brain injury (iTBI). This is a pilot study to determine whether the progression of signs and symptoms and radiographic findings of MVC brain injury (mvcTBI) in children of the age…